When enabled, only IPs in the Exclusive Allow IP List (see the following sections of this documentation about configuring it) will be allowed to access the administrator area of the site. All other attempts to access the administrator pages will be redirected to the site's home page. Be careful when using this feature! If you haven't added your own IP to the Exclusive Allow IP List you will get locked out of your administrator area!

Please look into the Exclusive Allow IP List documentation section for more information.

	Important
	IPs added to the Administrator Exclusive Allow IP List are fully vetted as far as Admin Tools is concerned. This means that no security measure will be applied against them. Please place only very well trusted IPs in this list! If an attack is launched from this IP, it will not be blocked by Admin Tools!

When enabled, if the visitor's IP is in the IP Disallow List (see the following sections of this documentation about configuring it) they will immediately get a 403 Forbidden error message upon trying to access your site.

Normally, you can access your site's administrator area using a URL similar to http://www.example.com/administrator. Potential hackers already know that and will try to access your site's administrator area the same way. From that point they can try to brute force their way in (guess your username and password) or simply use the fact that an administrator area exists to deduce that your site is running Joomla! and attack it. By entering a word here, you are required to include it as a URL parameter in order to access your administrator area. For instance, if you enter the word test here you will only be able to access your site's administrator area with a URL similar to http://www.example.com/administrator?test . All other attempts to access the administrator area will be redirected to the site's home page. If you do not wish to use this feature, leave this field blank.

The secret URL parameter must start with a letter. If it starts with a number, you will immediately get a "Illegal variable _files or _env or _get or _post or _cookie or _server or _session or globals passed to script" error when trying to access your site's administrator back-end. It should also contain only lowercase and uppercase ASCII characters and numbers (a-z, A-Z, 0-9), dashes and underscores in order to ensure the widest compatibility with all possible browser and server combinations.

Any other characters you use (such as: punctuation; special characters; Latin letters with accents or diacritics; Greek, Cyrillic, Chinese, Japanese and other ethnic script characters)will have to be URL-encoded. This makes it difficult and tricky to use, hence our recommendation not to use it.

Moreover note that some extended Unicode characters such as certain Traditional Chinese characters and Emoji cannot be used. They will be either rejected by the server or trigger a server protection which will lock you out from your site at the hosting level (you'll have to contact your host to unblock you).

Finally note that on most servers this is case sensitive, i.e. abc, ABC and Abc are three different secret words.

Tip

Some servers do not work with http://www.example.com/administrator?test due to their configuration. You may want to try using http://www.example.com/administrator/?test (add a slash right before the question mark) or http://www.example.com/administrator/index.php?test (add /index.php right before the question mark). One of them is bound to work on your server. Unfortunately, there is no way to know which ones will work on your server except for trying them out. The first one (http://www.example.com/administrator?test) works on 95% of servers and that's what we recommend trying out first.

Please be aware of some pitfalls with this feature:

As noted above, when your login session expires and you try to access an administrator page you will get redirected to the site's frontend and a Blocked Request will be logged against your IP with the reason “Admin Query String”. If that happens enough times — for example because your browser is trying to silently access administrator pages without your interaction such as when you have multiple background tabs open or because of its Frequently Visited / Top Sites / similar feature — you might have your own IP temporarily blocked, preventing you from accessing your site.

When this option is set to a value other than Disabled, Admin Tools will set a secure browser cookie when you log into your site's administrator. If this cookie is present and valid Admin Tools will allow you access to Joomla's administrator login page even if the URL does not include the Administrator Secret URL Parameter — like, for example, when your session expires. This allows you to log back into your site's administrator without a Blocked Request being logged for your IP address therefore without risking getting blocked off your site.

The cookie is removed from your browser and made invalid in the database when you a. log out of the site's backend (see caveat below); b. when you change the user's password (if Joomla's Remember Me plugin is published); and c. when a possible attack against this feature is detected.

Caveat: if you have enabled Linked Sessions on your site the cookie will be removed when you log out from either the backend of the frontend of your site. That's how Joomla works, it's not an Admin Tools bug. Joomla's Linked Sessions feature issues a logout on both the frontend and backend application in such a way that the backend application cannot discern whether it's a real backend logout or a Linked Sessions logout.

There are four settings for this option:

We recommend setting this feature to “Enabled, notify when used” or “Enabled” on most sites. The “Enabled, remind to use the full URL” is normally only necessary as a default, to remind Super Users that this feature exists and how to control it.

If you want to customise the message displayed when this is set to “Enabled, notify when used” and the first part of the message displayed when this is set to “Enabled, remind to use the full URL” you can do a language override for the language key PLG_ADMINTOOLS_MSG_ADMINPW_COOKIE .

If you would like to customise the second half of the messages printed to regular backend users and Super Users when this is set to “Enabled, remind to use the full URL” you can do a language override for the language keys PLG_ADMINTOOLS_MSG_ADMINPW_COOKIE_NONSUPERUSER and PLG_ADMINTOOLS_MSG_ADMINPW_COOKIE_SUPERUSER respectively.

The cookies for this feature are stored in Joomla's #__user_keys database table, along with Joomla's Remember Me secure cookie settings and possibly other third party extensions' secure cookie settings, as per Joomla's best practices for implementing any feature requiring the use of secure cookies. Joomla's Remember Me may remove ALL cookie settings for a user when the user logs out, their password changes or it detects a possible attack — this includes the secure cookie settings for Admin Tools itself. Third party extensions may remove secure cookie settings for a user under other circumstances as well. Before assuming this feature does not work please make sure that neither Joomla's Remember Me nor a third party extension are removing records from that table.

When enabled, Admin Tools will prevent back-end users from trying to disable (unpublish) the plugin. This means that you will also be unable to unpublish the plugin until you disable this option!

By default, Joomla! allows users with back-end access to log in to the site any time of the day. On smaller sites which have only a handful, or even just one, administrators on the same zone this means that someone can try to log in with a stolen username / password while you are fast asleep and unable to respond to the unexpected login. This where the Away Schedule comes into play. If a user with back-end login privileges tries to log in to the front- or back-end of your sute between the "from" and "to" hour of the day they will be denied login. Moreover, if someone tries to access the administrator login page during that time they will be redirected to the front-end of the site – even if the have used the correct Administrator secret URL parameter.

Please note that this feature does not affect your regular users logging in to the front-end of your site. It only prevents users belonging to a group with the Admin Login privilege. You can check which groups have that privilege by clicking on the System, Global Configuration menu of your site and visiting the Permissions tab.

The From and To time has to to be entered in 24-hour format with trailing zeros, e.g. 09:15 for a quarter past 9 a.m. and 21:30 for half past 9 p.m. The time is entered in your server's timezone which may be different than the timezone you live in. For your convenience, the server's time at the time of the page load (in 24 hour format) is shown to you right below the Away Schedule.

When enabled, Admin Tools will try to detect common SQL injection attacks against your site and block them.

But what is a SQLi attack? A few Joomla extension developers are hobbyists, without experience and / or security training; or mistakes do happen, as Joomla itself has found out the hard way. One of the common mistakes they do is to make assumptions about the nature or the content of user-submitted data, interpolating them into database queries as-is. Database queries are also called SQL queries (SQL, pronounced "sequel", is the shorthand for Structured Query Language, the programming language the database queries are written in). An attacker can exploit this mistake by sending data which have the effect of terminating the developer's database query and starting a new one which either dumps privileged data -such as usernames and passwords- or modifies data into the database - such as adding a new Super User under the control of the attacker. This class of attacks is called an SQL Injection, or SQLi for short, since the attacker "injects" his own code into a SQL query running on the site.

Many hackers will try to access your site using a browser configured to send malicious PHP code in its user agent string (a small piece of text used to describe the browser to your server). The idea is that buggy log processing software will parse it and allow the hacker to gain control of your website. When enabled, this feature allows Admin Tools to detect such attacks and block the request.

Some hackers will try to force a vulnerable extension into loading PHP code directly from their server. This is done by passing an http(s):// or ftp:// URL in their request, pointing to their malicious site. When this option is enabled, Admin Tools will look for such cases, try to fetch the remote URL and scan its contents. If it is found to contain PHP code, it will block the request.

Important

If your site starts throwing white pages when submitting a URL in your site's front-end, please disable this option. The white page means that your server is not susceptible to this kind of attack and doesn't properly advertise this to Admin Tools when requested. In this case, Admin Tools crashes while trying to scan the contents of the remote location, causing the white page error. Disabling this option in such a case poses no security risk.

Some hackers will try to read the files of your site using the php:// wrapper and some advanced PHP filters. When this option is enabled, Admin Tools will block every request that contains the php:// string.

Some hackers try to trick vulnerable components into loading arbitrary files. Depending on the vulnerable component, the file will either be output verbatim or parsed as a PHP file. This allows attackers to disclose sensitive information about your site or run malicious code uploaded to your site through another vulnerable vector, e.g. an unfiltered upload of executable PHP code. When this option is enabled, Admin Tools will search the request parameters for anything which looks like a file path. If one is found, it will be scanned. If it is found to contain PHP code, the request will be rejected.

	Important
	This feature does NOT prevent dumping of non-PHP files, e.g. the /etc/passwd file of Linux servers.

Prevents malicious input data which can be used to trick PHP's internal session handler into executing arbitrary code when it's restoring the user session.

The PHP session unserializer has a major bug which makes it misinterpret stored session data if they contain specific character combinations, overwriting the legitimate session data with the attacker-defined contents. Combined with some other features of PHP this can lead to the execution of arbitrary PHP code. In short, attackers can send malicious data in one page load and get arbitrary code to execute in the next page load. This feature of Admin Tools detects and blocks this kind of malicious data. CAUTION: It may block some legitimate requests as well.

Warning

This attack vector is NOT unique to Joomla!. It is a low level PHP bug / vulnerability which was fixed only in PHP 5.5.4 and later versions. Furthermore, default PHP settings even in newer versions of PHP use the old, vulnerable setting, putting all sites using session data at risk! We VERY STRONGLY recommend that all our clients use PHP 5.5.4 or later and edit their php.ini to modify this line: session.serialize_handler = php to session.serialize_handler = php_serialize This is the ONLY guaranteed way to fix this low level PHP vulnerability across all possible attack vectors, including those yet undiscovered.

When enabled, all requests containing at least one word in the Bad Words list (configured separately, see the next sessions) will be blocked. By default the Bad Words list is empty; you have to configure it to match your site's needs. One good idea is to include pharmaceutical, luxury watches and shoes brand names, as this makes up the majority of comment and contact spam received on web sites.

Joomla's powerful frontend display comes, to a large extent, from being to configure its components and modules per menu item. Each menu item has a numeric ID, called “Itemid” in Joomla parlance. In fact, the Itemid is always present in the request parameters. When you have ‘Search Engine Friendly URLs’ turned off you can see it in the request. When it's enabled, Joomla automatically populates it from the URL query, i.e. the path in the URL you are using to access a page on your site (but in this case it can also be overridden in the URL). This is such a basic concept that Joomla's core code make the assumption that the Itemid is always a positive integer.

If someone makes a request with an Itemid which is not a positive integer, for example something like https://www.example.com/foobar?Itemid=123/ (note the slash after the number 123, it's part of the Itemid value!), Joomla will throw an error and a PHP exception email will be sent to you if you've configured this feature in Admin Tools. In most cases it's due to a search engine having cached an invalid URL like the one above. In some cases it might be a malicious probe with a technique called fuzzing, i.e. sending random data in known URL parameters to see if the site breaks in a way that can be exploited by an attacker. While Joomla itself will merely throw an exception, it is possible that system plugins executing before Joomla's router kicks in read the invalid Itemid and behave unexpectedly.

The ItemidShield deals with these requests in one of the following ways:

Joomla! has a number of query string parameters with a special meaning. These parameters cannot be used by extensions for any other purpose. Therefore, these parameters have a well-defined expected format. This feature checks whether these parameters follow this format. If not, the request is blocked.

Discrepancies between the expected format and the value in the HTTP request usually happen because of one of two reasons. The first reason is an attacker is trying to test your site for Reflected Cross-Site Scripting (Reflected XSS). In this case, the attacker tries to pass malicious JavaScript code, hoping that your template will output the malicious code verbatim in the output, making it executable. This can then be used to create maliciously crafted links which can lead to admins or users of your site getting hacked. The other reason is that there is a simple coding mistake in an extension, usually one which happens either under unexpected circumstances, or one which went by undetected because Joomla! “cleans” the content of core parameter query strings before using them. In the latter case, please contact the developer of the affected extension – NOT the developers of Admin Tools! – to address the problem in their code.

How this feature works

Admin Tools checks the value of the following query string parameters to ensure they are either unset, or their value follows the expected core Joomla! filter format for each one of them. This Admin Tools feature DOES NOT inspect the contents of each value, i.e. it does not try to make inferences about their meaning and validity, with the sole exception of the type parameter when format=feed (see below). The checks take place twice: in the onAfterInitialise and onAfterRoute events. The former runs as early as possible, checking the values coming into the application from the request (checking the $_REQUEST, $_GET, and $_POST PHP superglobals, as parsed by Joomla!). The latter checks the same values after Joomla! has performed SEF URL routing. Therefore, it makes sure that neither the request contains tainted data, nor that a rogue database entry or plugin corrupted the values of core variables.

The meaning of the filters listed above is exactly what Joomla! defines them to be, namely:

This is a list of fully qualified domain names your site can be accessed on, one domain per line. DO NOT enter http:// or https:// in front, do NOT enter the / after the domain name or the path that follows it. This is a domain name, not a URL. For example: example.com. You do not need to enter the www/non-www versions of the domain names or domain names which resolve to the localhost IP address (127.0.0.1 for IPv4 or ::1 for IPv6). If an attacker tries to access your site with an HTTP Host header that does not match these domain names (or their www/non-www versions) they will receive an HTTP 400 Bad Request error message.

This feature mitigates a class of attacks called “HTTP Host spoofing” which affects a stark minority of servers, mostly servers which were set up by someone who doesn't understand web server security enough or at all. On those servers you can send an HTTP Host header which confuses the server into believing that this is the domain name it's running on. So, even though you are accessing a site on www.example.com you can send it a Host: www.evil.hack HTTP header and now all URLs generated by the server will use the www.evil.hack domain name. This is used in phishing attacks to misdirect a submitted form with login credentials to a server under the attacker's control even though the browser's address bar shows a legitimate domain name.

If you are on an affected server you are VERY STRONGLY recommended to use this feature INSTEAD OF setting the $live_site URL in configuration.php, the latter being the traditional but incorrect way of mitigating such an issue. Setting the $live_site URL limits your site to exactly one domain name (remember that example.com and www.example.com are two different domain names!) and protocol (HTTP vs HTTPS). Therefore using $live_site is extremely limiting and can cause your site to stop working if you try to enable/disable HTTPS everywhere in Joomla's Global Configuration, enable/disable www to non-www redirections etc. Moreover, the $live_site URL in configuration.php does NOT protect against all host spoofing attacks. What Admin Tools does will indeed protect all requests handled by Joomla against such attacks without causing any of the adverse effects of Joomla's recommended course of action.

When this option is enabled, Admin Tools will connect to the Have I Been Pwned database and check if the hash of the current password is known. If a match is found, the user will be blocked from using an insecure password.

Wait, are you sharing my password? Is that service secure?

First of all, we do not share your password. We're only sending a fraction (only first 5 chars) of the hash of your password. This method is called k-anonymity and it's a very secure way to share sensitive data without compromising its privacy. Your password CAN NOT be derived from this partial information. If you want to read the whole details of this implementation, you can take a look at this page.

Regarding the external service, it is powered by two well known figures: Troy Hunt (a security research) and CloudFlare (leader in Content Deliver System services). The service is so important for the security of computer systems that even the United States of America Federal Bureau of Investigation (FBI) contributes to it.

Most likely you want to enable this feature only for specific groups: Admin Tools will check for well-known passwords only users belonging to those groups (default is Super Users)

Joomla allows all users who do not have the Super User permission to request a self-service password reset. This is typically through the “Forgot your password?” feature in the frontend login module and the frontend users component, both of which go through the frontend users component to send an email to the user to help them reset their password.

In some cases it is prudent to disallow this feature for certain types of users. For example, you may have user groups which do not have the Super User permission but can be critical to the operation of your site such as people doing end user support, handle personal or privileged information, control content publication workflows etc. A successful account takeover could have far-reaching implications for the operation of your site and/or business.

This feature allows you to disable the self-service password reset feature for users belonging in specific user groups.

Please note that this feature DOES NOT control whether users with Super User permissions are allowed to reset their password! Joomla itself automatically disallows self-service password resets for these users and this cannot be changed (it's a hard-coded check no third party plugin can change). This means that Super Users cannot reset their own password using the Forgot Your Password feature; this has to be done either by logging in and editing their user profile OR by having their user profile edited by another user with sufficient permissions to edit user profiles. This is a built-in Joomla feature, not under the control of Admin Tools.

Finally, please note that this feature only applies to self-service password resets sent by Joomla's frontend com_users component. It DOES NOT prevent third party software implementing its own password reset feature from allowing these users to reset their passwords.

Choose the user groups which will be prevented from using Joomla's self-service password reset. Only visible and applicable when the “Disable password reset for specific User Groups” option is enabled.

Only users which are directly assigned a user group will be disallowed to reset their password. That is to say, you cannot just select the Public group and expect nobody to be able to use this feature; the restriction is NOT applied to child user groups.

Also note that you do not need to select the Super Users group or any other group which grants the Super User permission. Joomla itself automatically disallows self-service password resets for these users and this cannot be changed (it's a hard-coded check no third party plugin can change). This means that Super Users cannot reset their own password using the Forgot Your Password feature; this has to be done either by logging in and editing their user profile OR by having their user profile edited by another user with sufficient permissions to edit user profiles. This is a built-in Joomla feature, not under the control of Admin Tools.

When enabled, Admin Tools will prevent editing a user which belongs to or is added to one of the user groups set in the option below. This restriction applies to the backend, frontend, and API applications and cannot be overridden even by Super Users.

If you do not select specific user groups, Admin Tools will apply this restriction to all users who can log into the site's backend.

The idea behind this feature is that it provides an additional protection against privilege escalation, and cross-site scripting attacks. For example, a malicious user may exploit a vulnerability in your browser, browser extension, or email programme to trick you into visiting a URL while logged into your site as a privileged user so that a known user account is granted privileged access to your site (e.g. Super User), or a new user account with privileged access is created. With this protection in place this will be impossible.

	Important
	If you want to make any changes to a user account protected by this feature you need to temporarily disable this feature first.

Choose the user groups which will be protected by the “Disable editing user properties” feature.

If you do not select specific user groups, Admin Tools will automatically determine which user groups have backend login privileges and protect them.

If your site has user groups which have elevated privileges in the frontend or backend of the site such as e-commerce store managers, forum moderator, support ticket system user agents etc we recommend that you select these user groups in addition to the standard privileged backend user groups (for most sites that would be Manager, Administrator, and Super Users).

This feature allows to prevent creating or editing users from the frontend of the site, as long as this users belong to or are added to one or more user groups selected in the option below. The default (when no group is selected) is to prevent editing or creating users which belong or are added to any group which has backend access privileges.

The idea behind this feature is that you should not be able to create a new user with administrative backend login privileges from the public frontend, as this creates an opportunity for privilege escalation. That is to say, if an attacker finds a vulnerability which allows them to surreptitiously create new user accounts which belong in one or more privileged user groups (e.g. Administrator, Super User, etc), or add an existing user account to privileged user groups they would be able to convert a standard, unprivileged account into something much more powerful with detrimental impact to the security of your site.

This feature addresses some of the most notorious zero day attacks in Joomla! which took place between 2015 and 2016 and we recommend having it turned on at all times. If you need to disable it we strongly recommend rethinking whatever leads you to disable this setting because it's creating a gaping security hole on your site.

Select the user groups the Disable creating / editing users from the frontend feature above applies to.

If you make no selection, Admin Tools will automatically determine which user groups have backend login privileges and apply this feature to these user groups.

If your site has user groups which have elevated privileges in the frontend of the site such as e-commerce store managers, forum moderator, support ticket system user agents etc we recommend that you select these user groups in addition to the standard privileged backend user groups (for most sites that would be Manager, Administrator, and Super Users).

When this is enabled and someone tries to change the Global Configuration of Joomla!, either from the back-end or the front-end, you will either be notified or they will get blocked (depending on your settings below). This feature is designed to protect you against sly hackers or malicious administrators who subtly change your site's configuration for nefarious purposes, e.g. by elevating the global privileges of user groups.

When this is enabled and someone tries to change the configuration of any core Joomla! or third party component (what you see when you click Options in a component's toolbar) from the back-end of your site you will either be notified or they will get blocked (depending on your settings below). This feature is designed to protect you against sly hackers or malicious administrators who subtly change your components' configuration for nefarious purposes, e.g. by elevating the privileges of user groups with regards to a particular component.

This option works in conjunction with the two above. You define what do you want to do when either global or component configuration is enabled and a change is detected in the configuration.

Critical files commonly modified by hackers (index.php, administrator/index.php and the index.php, error.php and component.php of all templates installed on the site) will be monitored for changes on every page load. If a change is detected, an email will be sent to the email addresses configured in Email this address on blocked request. This usually lets you get an ahead warning in case of a successful hacking attempt.

Admin Tools checks these files every time your site loads a page. The size of the file, the file's last modification date, the MD5 checksum of the file's contents and the SHA-1 checksum of the file's contents are calculated by PHP and compared against the information stored in the database table #__admintools_storage (where #__ is the common table name prefix of your site, as defined in your site's configuration.php file), in the row with the key criticalfiles. If any of this information has changed since the last request to your site, Admin Tools considers the file changed and triggers an email to you about changed files. Every time a change is detected the aforementioned information for each file is updated in the #__admintools_storage database table. This way you will not get any further e-mails about the changed file unless it changes once again.

It is possible for an external application or process to modify these files, then restore them back to their previous state — including the last modified date. If a request to your site takes place while any of these files is in a modified state you will receive an email. This may be perceived as a “false positive” because by the time you check your site again the change has been reverted. This is NOT a false positive, something really DID change. Admin Tools deliberately sends you an email because this is something which can also happen during a legitimate attack: the attacker modifies one of these files to gain access to your site, then covers up their tracks by restoring the file to its previous state.

It is also possible that you will receive an email if someone or something modifies the #__admintools_storage database table row. In this case the contents of the database table may not reflect the files currently on the server's filesystem. As a result, Admin Tools perceives the files as changed. For example, this may happen if the host automatically rolled back the state of your database or when you restore a database-only backup / SQL dump of your database.

Finally, you will most likely receive this kind of email after updating the Joomla version on your site, after updating your site's template, and after updating the Global Configuration of your site — even if this happens automatically without your interaction. In both cases some of the critical files have changed. When you update Joomla its index.php files are changed. When you update your template its index.php, error.php and component.php files are changed. When you save your site's Global Configuration —or a third party extension or external software updates your site's Global Configuration— the configuration.php file is changed. These are expected changes. If they happen without your knowledge you should track down what is causing them and decide whether it's acceptable behaviour or not.

Monitor the following files (one per line) for changes. If a change is detected, an email will be sent to the email addresses configured in Email this address on blocked request.

The file paths must be entered relative to the site's root, without a leading forward slash.

Admin Tools will keep track of the user accounts with Super User access. If a new Super User is added outside of Joomla's Users page, an email will be sent to the email addresses configured in Email this address on blocked request. Moreover, the detected new Super User accounts will be automatically blocked. The idea is that these Super Users are most likely create as the result of a hack or rogue code.

Please note that users created or added by other Super Users in the backend of the site using Joomla's Users page will NOT be blocked by this feature. If you wish to disable this please use the Disable editing backend users' properties feature.

When enabled, Admin Tools will disable the Joomla! Two Factor Authentication configuration for a user when they are resetting their password.

Joomla! allows every user of the site to enable Two Factor Authentication (TFA) for their user account. In case the user misplace their TFA device or is otherwise unable to use TFA they are given emergency one time passwords. However, many people forget to note them down or do not understand how to use them. Every time they cannot use TFA they have to contact an administrator of the site to disable TFA on their account. Even worse, when the user is an Administrator themselves they have no way to disable TFA without renaming files – and knowing which files to rename. This is where this Admin Tools feature comes in handy.

The workflow is the following: The locked out user starts by using the "Forgot your password?" link in Joomla! to request a password reset. The receive an email with instructions. They follow the link which takes them back to the site where they enter their username and the password reset authorisation code found in the email. Now they enter their new password. When the password changes, the "Disable Joomla!'s Two-Factor Authentication on password reset" feature of Admin Tools kicks in and disables Two Factor Authentication on this user's account. The user can now log in to the site using just their username and password.

	Important
	Please remember that this ONLY applies to the two factor authentication feature built in Joomla! itself. If you are using third party Two Factor Authentication solutions such as Akeeba LoginGuard this option will have NO effect on them.

We recommend AGAINST using this option because it can degrade the security of your user accounts. If an attacker gains control of the email account of a privileged user of your site, e.g. an Administrator or Super User, they will be able to reset their password AND disable their Two Factor Authentication at the same time. This will allow them to log into and take over your site. We strongly advise you to use a different Two Factor Authentication solution, e.g. Akeeba LoginGuard, with one or more fallback authentication methods. Alternatively, set up and use WebAuthn for logging into your site which bypasses the Two Factor Authentication and is far more secure than using a username, password and Two Factor Authentication code to log into your site.

When enabled, it will not be possible for Super Administrators to log in to your site's front-end. This is a security precaution against password brute forcing. One common method is an attacker trying to login to the front-end of your site as a Super Administrator, trying different password until he finds the correct one. When this option is enabled, he will not be able to log in as a Super Administrator in the front-end of the site, crippling this brute forcing method of determining the Super Administrator password.

When enabled, failed login attempts of any kind of user (even simple registered users) count as a reason to block the request and are being logged in Admin Tools' Blocked Requests Log. There is a very useful implication to that. Since they count as security blocked requests they count towards the limit you set up in the automatic IP blocking. Therefore, after a number of failed login attempts, the user's IP will be automatically blocked for the duration you have set up.

By default, when a failed login is treated as a blocked request no other information is logged except the IP address of the failed login. This is very unhelpful if a user gets blocked and they can't figure out what is their IP address. Enabling this option will also log the username they used for the failed login. The downside is that your Blocked Requests Log now contains the usernames of all failed logins which can be a privacy issue if the log file is leaked to an attacker or other unauthorised person due to a vulnerability in a third party extension or by a mistake by one of the administrators of the site.

Please note that Admin Tools WILL NOT log passwords for failed logins and we WILL NOT consider any feature request to implement this kind of option. If were to log failed logins' passwords we'd be essentially storing a password the user may be using on a different service OR a slight variation of their real password in plain text in the database. This can be a major security concern.

Admin Tools can optionally deactivate existing user accounts when there are multiple failed attempts to log in using their username, protecting user accounts from brute force attacks. In here you can specify the number of failed logins and the time period these have to occur before the user is deactivated, e.g. 3 failed logins in 1 minute.

In order for this feature to work you must have enabled the Treat failed logins as a reason for blocking the request option above and NOT include Login failure in the Do not log these reasons option in the Logging And Reporting area of this configuration page.

The behaviour of this feature depends on the user registration setup of your site, as defined in Users, User Manager, Options in your site's back-end. When Allow User Registration is set to No this Admin Tools feature does not do anything at all! When Allow User Registration is set to Yes there are three possible behaviours depending on the setting of the New User Account Activation option:

Display a message in browser console to warn the user to avoid running any command inside it. This can lead to hacking yourself (a.k.a. Self XSS attacks) and steal your account data.

Admin Tools can block user registration based on the email domain they are using (listed in the field below):

Enter one domain per line. Having no non-empty lines disables this feature.

Should this feature be enabled at all?

For performance reasons, this feature only runs periodically, checking which backend user accounts are inactive and disabling / forcing a password reset on them. Here you can define how often it will run. The default is 60 minutes which means that it will run at most once every 60 minutes. Other useful values are 1440 (at most once a day) and 10080 (at most once a week).

Which user groups this feature should apply to? We recommend choosing at the very least the Administrator and Super User groups. If you have other user groups with backend login we recommend you add them as well.

If you do not specify any groups, or choose the "Show All Groups" option, Admin Tools will consider users from all user groups which have the Admin Login privilege, as set up in the Global Configuration of your site.

Even though you can select user groups without backend access they are NOT taken into account. The user groups list is rendered by Joomla! and it does not provide a way to remove user groups which lack backend access.

Users who have not logged into the site for at least this many days will be blocked or forced to reset their password. The default is 90 days (three months). Reasonable values are between 30 and 365 days. If you set this to 0 or leave this blank the feature will effectively be disabled.

What should Admin Tools do with the user accounts which have not logged in for a long time?

Block means that the user will be completely blocked from accessing the site. This is implemented by setting the Block User to Yes. The blocked users cannot unblock themselves. A Super User will have to do that by editing the user from the Joomla backend Users, Manage menu item.

Force Password Reset is the recommended and selected by default method. In this case the user account is allowed to log in but they will have to immediately reset their password and log back in before they can do anything on the site. The password reset takes place through Joomla's built in password reset method. It is NOT handled by Admin Tools.

Any users you select here are not going to be prevented from logging into the site. We recommend that you add the site owner here. Moreover, if you are building a site for a client, you should add your user account as well. This will let you log into the site to provide technical assistant should your client require it.

It is worth noting that if Login prevention method is set to Block and Protected Users is empty Admin Tools will NOT block ANY Super Users, even if they haven't logged in for a time period longer than the specified maximum number of days. This is a precaution against losing all access to the site by accident (if all Super Users get blocked then nobody is left to unblock you). If you have a site with multiple Super Users and use the Block method you MUST specify at least one Protected User for Admin Tools to provide a sensible level of protection against forgotten user accounts.

All Joomla! installations set the meta generator tag, a piece of HTML in the header of all pages, to advertise the fact that your site is running on Joomla!. This information is cached by search engines and is exploited by attackers to deduce that your site is running Joomla! when looking for potential targets. Enabling this option allows to set up a custom generator tag.

Enter the custom content of the generator meta tag. This will be applied on all frontend HTML pages generated by Joomla.

One of the lesser known Joomla! features are its system templates. The value of the tmpl keyword tells Joomla which .php file in the template's folder it will use to render the page. For example, ?tmpl=component tells Joomla to use the component.php file which renders only the component output, without any modules, menus or other embellishments on the page. Of and by itself this feature is not dangerous. However, hackers have realized that this feature is being abused by badly architectured plugins and components beyond the intended purpose in Joomla itself. This badly constructed third party software expects non-standard values in the tmpl keyword to do something specific, e.g. handle AJAX requests, update a shopping cart etc. The downside is that depending on how this is implemented it may open a security hole, e.g. if the code parsing the tmpl keyword in a third party extension gets confused by certain types of data and executes arbitrary code or does something unintended. For this reason Admin Tools has the Block tmpl=foo system template switch feature which will block any request that does not have one of the expected tmpl keywords for your site.

The list of tmpl keywords which should be allowed of your site, as a comma separated list. At the very least you MUST include system and component, otherwise Joomla! will not work properly. Default value: component,system,raw,koowa,cartupdate

The component, system and raw keywords are defined and used by Joomla itself. tmpl=component tells Joomla to only show the component output, without any modules, menus or other embellishments – however, the template's CSS files are loaded. tmpl=raw has a similar effect to tmpl=component, without loading the template's CSS files at all. tmpl=system is used for displaying error pages. Your site will NOT work properly if you remove any of these keywords from the list of allowed tmpl keywords.

Note

The koowa keyword is only required when you run components based on Nooku Framework a.k.a. Koowa, for example DOCman. According to the Koowa developers' email we received on January 2015 there are two reasons for the use of the koowa keyword: The modals which contain full page JavaScript "applications", like the multi file uploader, was breaking on some templates out there because they do weird stuff in their JavaScript. No matter the precautions taken by Koowa there is at least one template out there removing the JavaScript files from the page output because they "looked like JavaScript". Frontend edit forms. The Koowa developers also had a lot of problems by using tmpl=component or the normal template in frontend forms. Templates re-define Bootstrap rules, use Bootstrap 3, add weird JavaScript to "enhance" the page that has no job in the component output and so on. So, basically, they added the custom "koowa" tmpl keyword to work around restrictions imposed by templates. The correct solution would be using tmpl=raw&format=raw but they decided otherwise. Therefore we include this keyword by default. If you are not using any extension powered by Koowa you are advised to remove that keyword from your site.

Note

The cartupdate keyword is currently only used by VirtueMart. For some strange reason its developer does not want to use format=raw for cart updates even though this is the recommended, tried and tested way to do this since Joomla! 1.5. Having had the past experience of trying to discuss best practices with him to no avail we decided to add this keyword by default without even contacting him to propose an alternative. If you are not using VirtueMart please remove this keyword from your site.

Another Joomla! hidden feature is the ability to switch between installed templates by passing a special URL parameter called "template". Enabling this option will turn off this hidden Joomla! feature.

Enabling this option partially overrides the previous option (the blocking of template=foo in the URL). If the template= URL query parameter specifies the name of a template which exists in your template directory, then it will be allowed without the request being blocked.

	Important
	If you are using the "Send this page by email" icon in your articles and/or multiple templates on your site, you MUST enable this option.

You MUST enable this option if you want your site visitors to be able to use Joomla!'s com_mailto component, i.e. the "Send this page by email" icon in your articles.

Moreover, you must use it on sites which are using more than one template at the same time. What we mean by that is that you can go to Joomla!'s back-end, go to Extensions, Templates and assign any of the installed templates to any number of menu items. When you do that, several components need to append template=yourDefaultTemplateName to the URL. This would cause your site to block the request. By enabling this option you prevent these requests from being accidentally blocked.

Whether the 404 Shield feature should be enabled or not.

This feature 404 will block irregular "Page not found" requests which typically indicate that your site is being targeted by an automatic vulnerability scanner or hacking tool. For example, someone trying to access the folder wp-admin on your Joomla site is irregular since that folder is the administration area of WordPress. Since your site is running Joomla it means that the request to your site was very likely malicious, e.g. an automated tool (bot) trying to guess your access credentials by trying various common combinations of usernames and passwords. In this light, the request has to be blocked.

The default list of URLs to be blocked by 404Shield consists of known WordPress-only paths. That's because we know that these URLs cannot be found on a Joomla site and are typically used by automated hacking tools, therefore minimising the possibility of false positives. You can always add more if you want to.

Turns the entire feature on and off

Enter your HTTP:BL key. You can sign up for Project Honeypot and get your key at http://www.projecthoneypot.org/httpbl_configure.php.

Project Honeypot uses a logarithmic "threat rating" to rank the possibility of a specific IP being a spammer. This options defines the minimum threat level an IP must have before it's blocked. A value of 25 means that this IP has submitted 100 spam messages on Project Honeypot's spam catching honeypots and is usually a safe indication that it belongs to a spammer. Do note that the rating is logarithmic. A value of 50 means 1,000 spam messages and a value of 75 means one million spam messages. Do not set it to values over 50, as you will most likely never block any spammer at all.

Project Honeypot reports when was the last time this IP was caught sending spam messages. The older this is (the higher the age is), the less likely is that this IP is still used by a spammer. You can chose here what will be the maximum reported age that will be blocked. The default value of 30 means that IPs which have submitted a spam message in the last 30 days will be blocked.

Sometimes Project Honeypot is not sure if an IP belongs to a spammer or it's a hapless chap who clicked on the wrong link. In this case the IP is marked as "suspicious". The default behaviour is to not block these IPs. However, if you are receiving a lot of spam it's a good idea to enable this feature and block even "suspicious" IPs. Ultimately, some unfortunate users will be inadvertently blocked, so use this option with caution!

Enter the IP addresses or address blocks which should never be automatically blocked.

Malicious URLs from these domain names WILL be blocked but a. this will not be logged and b. their IP address will not be automatically blocked by the "Auto-ban Repeat Offenders" feature below.

The purpose of this feature is similar to the Allowed Domains feature below, when you don't have a common domain name, just IP addresses. It makes sense to use this feature for the IP addresses of search engine bots, known external servers accessing your site (e.g. payment service providers sending callbacks to your site, site scanners, CloudFlare, Sucuri, etc).

Important

Do NOT add the IP of a blocked user to the Never Block These IPs list when you unblock a user. The vast majority of IP addresses are dynamically assigned by the user's Internet Service Provider and will change in a matter of minutes to weeks (typically: in a few hours). This has two knock-on effects for you: Your user will still get blocked once their IP address changes. Therefore, you have not solved the problem you set out to solve. You have an IP address which is allowed access to your site without getting automatically blocked. However this IP address is no longer under the control of a person you trust, creating a small hole in your site's defences. Always try to address the reason a user was blocked instead of putting their IP address in the Never Block These IPs list.

You can enter IPv4 and IPv6 addresses in the following formats:

You may enter a dynamic IP domain name prefixed by the at-sign (for IPv4) or hash-sign (for IPv6). This only applies if you are using a dynamic IP address domain provider (e.g. DynDNS). For example, if you are using DynDNS and your dynamic IP address domain name is example.dyndns.info and resolves to an IPv4 address you can enter @example.dyndns.info to always allow your dynamic IPv4 address. Conversely, if your dynamic hostname resolves to an IPv6 address you can enter #example.dyndns.info to always allow your dynamic IPv4 address. Be careful to enter the correct domain name or you may have a delay of up to 30" processing blocked requests.

	Tip
	If you are using the Exclusive Allow IP List feature to allow access to the administrator section of your site only to specific IPs, these IPs are automatically added to the safe list of IPs which should never be automatically blocked. You do not have to enter them here.

The default list of IP addresses lists the known good IP addresses of the search bot of the DuckDuckGo search engine: 20.191.45.212, 23.21.227.69, 40.88.21.235, 50.16.241.113, 50.16.241.114, 50.16.241.117, 50.16.247.234, 52.5.190.19, 52.204.97.54, 54.197.234.188, 54.208.100.253, 54.208.102.37, 107.21.1.8 The source of that list of IP addresses is the official DuckDuckBot documentation at https://help.duckduckgo.com/duckduckgo-help-pages/results/duckduckbot/

If the IP address of the visitor whose request would be blocked resolves to a domain name ending in what you enter here they will not be blocked. Effectively, these domain names have a free pass on your site.

Warning

Malicious URLs from these domain names WILL be blocked but a. this will not be logged and b. their IP address will not be automatically blocked by the "Auto-ban Repeat Offenders" feature below. This is done to protect your site against reflected search engine attacks. Let us explain this. Some hackers try to exploit search engines' eagerness to scan URLs, crafting malicious URLs to your site and putting them on their own sites. Search engines will see them and try to visit them on your site. You are explicitly allowing these search engines as you don't want to lock them out of your site. If the malicious URL wasn't blocked just because the request comes from a seemingly innocent source your site would be instantly hacked. That's why the malicious URLs are still blocked, just not logged or cause IP addresses to be automatically banned.

The default list of domain names is .crawl.baidu.com, .crawl.baidu.jp, .google.com, .googlebot.com, .search.msn.com, .crawl.yahoo.net, .yandex.ru, .yandex.net, .yandex.com which allows the search engine indexers for Baidu, Google, Bing, Yahoo and Yandex.

The source of this information is the following official documentation URLs of various search engines:

When requests from an IP address are blocked a certain number of times within a specified time period, as defined by the next three options, the IP address will be temporarily from accessing the site.

This feature is meant to be used as an additional defence against bots attacking your site. You should keep the Block After time period relatively short (in the range of a few seconds to a few minutes) and the number of detected attacks relative high. Otherwise a number of false positives or more innocuous block reasons such as trating failed logins as a block reason could result in your or your visitors' IP addresses being blocked.

For the same reason you should keep the block time relatively short, between a few minutes to an hour. Otherwise a legitimate visitor blocked accidentally due to false positives will be unable to access your site in a practical amount of time, losing you that site visitor possibly forever.

When requests from an IP address are blocked at least this many times within the period of time defined by the next two options it will be temporarily blocked from accessing the site. For example, if you set it to 3 attacks in 1 hour, Admin Tools will disallow access from an IP address which got at least 3 of its requests blocked within the last hour.

The number of blocked requests defined above must occur within this many seconds, minutes, hours or days. You enter the number here; you choose the unit of time measurement in the option below.

The unit of time measurement for the “Time period” setting above. Choose one of seconds, minutes, days or hours.

How long the block will last. For example, setting it to 1 day will block all access from this IP address for a whole day. Enter the number in this field, select the unit of time measurement in the next field.

The unit of time measurement for the “Block duration” setting above. Choose one of seconds, minutes, days or hours.

If an IP triggers this many auto-bans it will be permanently banned (added to the IP Disallow List) if they are about to be auto-banned again. Make sure that you turn on the IP Disallow List feature by setting Disallow site access to IPs in the IP Disallow List to Yes, otherwise the permanent adding to the IP Disallow List will have no effect.

When the previous option is enabled, after how many auto-bans an IP will be permanently banned (added to the IP Disallow List).

Admin Tools can optionally send you an email when an IP is automatically banned, to the email address entered in this field. This will allow you, for example, to determine if some IP is being regularly blocked, in which case it may be a good idea to place it in the permanent IP black list. Leave this field empty (default) to disable this feature.

Allows you to show a specific message to blocked IP addresses. You may want to explain to the user that his IP was blocked because suspicious activity was detected as originating from his IP address.

You can use the special text [IP] in all capital letters, without spaces between the brackets and IP, to display the user's IP in the message. This may be useful if someone gets accidentally blocked and asks you to help them.

Whenever an unhandled PHP exception is raised (ie an error on a database query), Admin Tools will send an email containing all the details (time, file and line raising the exception) for later debugging.

When enabled, the IP new users signed up from will be stored as User Notes.

Important

This feature is guaranteed to work only when a user registers to your site using the front-end user registration form provided by Joomla!. Users created through the back-end will not have their IP saved as a User Note because it makes no sense to do so (it's an administrator registering the user account on their behalf). Third party components creating new user accounts may also not trigger the plugin event.

It is suggested to keep this option enabled. When enabled, all potential security issues —blocked by Admin Tools— will be logged in the database and made available under the Blocked Requests Log tool. This is required for the automatic IP blocking feature to work.

Please note that turning off this feature will also disable the debug log file, even if the option below is set to Yes.

	Important
	When this option is turned off the automatic IP blocking of repeat offenders, automatic adding of IPs to the IP Disallow List and most email notification features will be deactivated.

Blocked requests due to these blocking reasons will not be logged. As a result, IPs getting their requests repeatedly blocked because of this reason will not be automatically banned from your site. Moreover, as there is no log, it will be impossible to tell why someone is being blocked from accessing your site when they trigger one of those reasons.

For a list of what each reason means please consult the list of WAF log reasons. You can start typing or click on on the field to show the list of reasons.

The default setting is empty

It is suggested to keep this option disabled unless you are troubleshooting.

When enabled, Admin Tools will create a file named admintools_blocked.php in your site's administrator/logs directory (or wherever you have configured your logs directory to be). This contains all the information sent in the request that Admin Tools blocked. This may include sensitive information such as usernames, passwords and personally identifiable information. For this reason you must only enable this feature for a limited amount of time when troubleshooting. We may ask you to do this, and send us a copy of the log file, if you ask us for support.

The file has an extension of .php and begins with a PHP die() statement to prevent direct web access if your log directory is accidentally left web accessible. An attacker may try to access the file but all they will get is a blank page.

When you disable that option, the existing log files will be removed once you visit Admin Tools' Control Panel page again.

Do note that your logs directory MUST be writable for the log file to be generated.

Some servers use automated file scanners which will mistakenly flag Admin Tools' log file as a security threat. Because of that they might issue an automated warning to you that your site is hacked, rename / delete the file or prevent web access to your site (put it offline). This is a mistake and does not reflect the truth. Our log file does have an executable extension (.php) and does contain the signatures of hacking attempts (the hacking attempts it stopped from hacking your site!) BUT the hacking attempts signature themselves are NOT executable. In fact, the only reason this is a .php file is so that we can put a PHP die() statement at the top of the file to prevent it from being executable over the web. This information is also printed at the top of the file, in its header. If your host is giving you grief about the log file please show them this documentation page or ask them to actually review the file and read its header. If they still insist that they have to block your site please go to a different host that understands how PHP works and, by extent, is a much safer choice. In the meantime, just disable the Keep a debug log file option.

Admin Tools will provide you with a link to look up the owner of an IP address in the emails it sends you, as well as the Blocked Requests Log and Auto IP Blocking Administrator pages. By default, it uses the ip-lookup.net service. This option allows you to use a different IP lookup service if you so wish.

As of Admin Tools 7, the IP lookup service MUST use HTTPS since you are sending it IP addresses. Doing so over plain HTTP may carry privacy and/or security risks.

Enter the URL of the IP lookup service you want to use in this text box. The {ip} part of the URL will be replaced with the IP address to look up. For example, the default URL (for ip-lookup.net) is http://ip-lookup.net/index.php?ip={ip}

Enter one or more email addresses (separated by commas) which will get notified whenever a request is blocked on your site. For example [email protected] for one recipient only or [email protected], [email protected], [email protected] for multiple recipients. The email addresses need not be in the same domain name and don't even need to be users of the site itself. Any email address will do.

A "blocked request" is anything which triggers the Web Application Firewall and causes it to block an incoming request to serve a page. This is useful to get an ahead warning in the event of a bot trying to perform a series of attacks on your site.

The contents of the e-mails can be configured using the Email Templates feature in the Web Application Firewall page.

Blocked requests caused by these blocking reasons will not result in an email being sent to the email address specified in "Email this address on blocked request".

For a list of what each reason means please consult the list of WAF log reasons. You can start typing or click on on the field to show the list of reasons.

The default setting is empty

Enter an email address which will get notified whenever someone successfully logs in to your site's administrator back-end. If you do not wish to use this feature, leave this field blank. If you enter an email address, every time someone logs in to the administrator area an email will be sent out to this email address stating the username and site name. If you want to send a notification to multiple email addresses separate them with commas, e.g. [email protected], [email protected]. The email addresses do not need to be in the same domain and they don't even have to be linked to users of your site.

This allows you to get instant notification of unexpected administrator area logins which are a tell-tale sign of a hacked site. In that unlikely event, immediately log in to your site's back-end area, go to Extensions, Admin Tools and click on the Emergency Off-Line Mode button. This will cut off the attacker's access to the entirety of your site and gives you ample time to upgrade your site and its extensions, as well as change the password (and maybe the username) of the compromised Super Administrator account. For maximum security, after taking your site back on-line, log out, clear your browser's cookies and cache and log in again.

The contents of the e-mails can be configured using the Email Templates feature in the Web Application Firewall page.

Enter an email address which will get notified whenever someone tries to log in to your site's administrator back-end but is denied access. If you do not wish to use this feature, leave this field blank. If you enter an email address, every time someone unsuccessfully tries to log in to the administrator area an email will be sent out to this email address stating the username and site name. If you want to send a notification to multiple email addresses separate them with commas, e.g. [email protected], [email protected]. The email addresses do not need to be in the same domain and they don't even have to be linked to users of your site.

This allows you to get instant notification of unexpected administrator area login attempts which are a tell-tale sign of a hacked site. In that unlikely event, immediately log in to your site's back-end area, go to Extensions, Admin Tools and click on the Emergency Off-Line Mode button. This will cut off the attacker's access to the entirety of your site and gives you ample time to upgrade your site and its extensions, as well as change the password (and maybe the username) of a potentially compromised Super Administrator account. For maximum security, after taking your site back on-line, log out, clear your browser's cookies and cache and log in again.

The contents of the e-mails can be configured using the Email Templates feature in the Web Application Firewall page.

By default, Admin Tools uses a generic message ("We detected that your latest request may have been part of suspicious activity and has been blocked. If you believe you are getting this message in error please let us know through our site's contact form.") when a request is blocked. Considering that this may not be exactly the kind of message you want your visitors to see, we allow you to customise it. Just type in the message to be shown to site visitors when a request is blocked.

By default, the Custom Message will be shown using Joomla!'s standard error message page. This is not always desirable, as that page lacks proper styling and admittedly looks very cheesy. When this option is enabled, however, Admin Tools will use a customisable HTML template.

The default HTML template file is located in the components/com_admintools/tmpl/Block/default.php file. DO NOT MODIFY THIS FILE DIRECTLY! It will be overwritten on each upgrade. Instead, you will have to do a template override. For more information regarding template overrides, please consult Joomla!'s documentation wiki page.

Some Admin Tools administrative functions have the potential to make your site behave in a way you didn't expect or even lock you out of your site. This can happen because of a misunderstanding of what a security feature does, a misconfiguration or –more rarely– a browser or server mangling the configuration you are submitting to Admin Tools. We understand that this leads to frustration and occasional panic as you have no idea what happened and how to fix it.

For this reason Admin Tools will automatically send you an email with troubleshooting instructions every time you take any administrative action which might result in getting locked out of your site or your site not working properly. These actions include applying the initial configuration with the Quick Setup Wizard, changing the Web Application Firewall configuration, applying administrator password protection or saving a new .htaccess, web.config or NginX configuration file through the relevant Admin Tools features.

The email explains what change took place and includes links to our troubleshooter documentation which can help you get your site back to a working state. Moreover, it has a reminder about getting support from us if all else fails.

The email is sent only to the email address recorded on the user account logged into Joomla who initiated this change. It is not sent to other Super Users, Administrators or, in general, any other email address. Also note that if you have set Receive system email to No in your Joomla! user profile you will not receive this email.

This option can be used to turn off this feature for all administrator users with access to Admin Tools, regardless of their Receive system email status. We recommend leaving this option enabled unless you are absolutely sure you know what you're doing and you're confident you can find your way to the troubleshooter documentation on your own.