Manual:Preventing access/it

Per aiuto nella personalizzazione dei permessi utente, vedi Manuale:Permessi utente . Questa pagina contiene esempi utili per restringere l'accesso.

Per informazioni su come modificare LocalSettings.php, consulta Manual:LocalSettings.php .

Semplice wiki privato

Per il frequente caso d'uso di un "wiki privato, per sé stessi e per altri utenti approvati", c'è bisogno di:

Restringere la visualizzazione
Restringere la modifica
Restringere la creazione di account

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Consulta gli avvertimenti della sezione in basso; questo è un semplice codice per un "uso generico", e potrebbe non corrispondere ai tuoi requisiti.

# Disable reading by anonymous users
$wgGroupPermissions['*']['read'] = false;

# Disable anonymous editing
$wgGroupPermissions['*']['edit'] = false;

# Prevent new user registrations except by sysops
$wgGroupPermissions['*']['createaccount'] = false;

A seconda di quali estensioni hai installato, potresti aver bisogno di autorizzare altre pagine. Per esempio se stai usando l'estensione Extension:ConfirmAccount , potresti voler autorizzare la pagina Special:RequestAccount. Se la lingua dei contenuti del tuo wiki non è l'Inglese, potresti aver bisogno di usare il nome tradotto della pagina speciale in questione.

Restringere la creazione di account

Per restringere la creazione di account, hai bisogno di modificare LocalSettings.php nel percorso alla radice della tua installazione MediaWiki.

# Prevent new user registrations except by sysops
$wgGroupPermissions['*']['createaccount'] = false;

Puoi usare l'estensione ConfirmAccount se desideri configurare una coda di conferma degli account. (In caso contrario puoi comunque procedere come segue.)

Le nuove utenze saranno comunque creabili dagli amministratori, nelle seguenti modalità:

Go to Special:Userlogin, quando si è autenticati come amministratori.
Clicca sul link "Crea un account" per accedere al modulo di creazione account.
Inserisci un nome utente e un indirizzo email, e clicca sul pulsante "tramite email". Note you need $wgEnableEmail=true or else the sysop must pick a password and send it to the user.

The account will be created with a random password which is then emailed to the given address (as with the "forgot password" feature).

The user will be requested to change password at first login; when they do this, the email address will also be marked as confirmed.

When you click the "create account" button instead, you have to manually send the user their password. If you've set $wgMinimalPasswordLength=0 (default configuration up to version 1.15) and you've left the password field blank, the user will be emailed an email address confirmation request but will be unable to access Special:Confirmemail to perform the confirmation. Instead, the user will get an error (unless you've added it to $wgWhitelistRead ); the user will be able to login with a blank password and then confirm email, but their password will not have been reset (it will have to be reset manually).

It may be appropriate to edit the text displayed when a non-user attempts to log in. This can be done at MediaWiki:Nosuchuser, when logged in as a sysop. Use plain text without any special formatting, as the formatting is ignored and the text is literally rendered. (Might have changed, see bug 12952).

You may also modify the contents of the email sent to new users by editing the page MediaWiki:Createaccount-text.

To prevent even sysops from creating accounts:

# Prevent new user registrations by anyone
$wgGroupPermissions['*']['createaccount'] = false;
$wgGroupPermissions['sysop']['createaccount'] = false;

To add a message on top of the login form, modify MediaWiki:Loginprompt.

Restrict editing

Restrict editing of all pages

Users will still be able to read pages with these modifications, and they can view the source by using Special:Export/Article name or other methods. See also bug 1859.

See Help:User rights and Manual:$wgGroupPermissions . If you use Extension:AbuseFilter , any wiki admin can also put various restrictions in place.

Some examples of how to protect all pages from editing (not reading) by certain classes of users:

Restrict anonymous editing

Requires that a user be registered before they can edit.

$wgGroupPermissions['*']['edit'] = false;

Restrict editing by all non-sysop users

Requires that a user be a member of the administrators (sysop) usergroup.

$wgGroupPermissions['*']['edit'] = false;
$wgGroupPermissions['user']['edit'] = false;
$wgGroupPermissions['sysop']['edit'] = true;

Restrict editing by absolutely everyone

$wgGroupPermissions['*']['edit'] = false;
$wgGroupPermissions['user']['edit'] = false;
$wgGroupPermissions['sysop']['edit'] = false;

Restrict editing of an entire namespace

Versione MediaWiki:

<translate> ≥</translate> 1.10

Starting from MediaWiki version 1.10, it is possible to protect entire namespaces using the $wgNamespaceProtection variable. Examples:

# Only allow autoconfirmed users to edit Project namespace
$wgNamespaceProtection[NS_PROJECT] = array( 'autoconfirmed' );

# Don't allow anyone to edit non-talk pages until they've confirmed their
# email address (assuming we have no custom namespaces and allow edits
# from non-emailconfirmed users to start with)
# Note for 1.13: emailconfirmed group and right were removed from default
# setup, if you want to use it, you'll have to re-enable it manually
$wgNamespaceProtection[NS_MAIN]     = $wgNamespaceProtection[NS_USER]  =
$wgNamespaceProtection[NS_PROJECT]  = $wgNamespaceProtection[NS_IMAGE] =
$wgNamespaceProtection[NS_TEMPLATE] = $wgNamespaceProtection[NS_HELP]  =
$wgNamespaceProtection[NS_CATEGORY] = array( 'emailconfirmed' );

# Only allow sysops to edit "Policy" namespace
$wgGroupPermissions['sysop']['editpolicy'] = true;
$wgNamespaceProtection[NS_POLICY] = array( 'editpolicy' );

Note that in the last case it's assumed that a custom namespace exists and that NS_POLICY is a defined constant equal to the namespace number. See Manual:Using custom namespaces and Manual:Namespace constants for a list of MediaWiki's core namespaces.

Restrict editing of certain specific pages

Use the Protect feature. By default, any sysop can protect pages so only other sysops can edit them. In 1.9 and higher, by default they can also protect pages so only "autoconfirmed" users (with accounts older than a configured period) can edit them. This does not require editing configuration files.

If you want to restrict editing to groups with specific permissions, edit $wgRestrictionLevels . To prevent actions other than edit and move, use $wgRestrictionTypes .

Restrict editing of all but a few pages

To impose a blanket restriction on editing for all pages, but allow a few (such as sandboxes, join request pages, etc.) to be more generously editable, you can use the EditSubpages extension. This may not fit too often, but you could also use the Restrict editing of certain specific pages method mentioned above, with all name spaces protected, and only a special one editable by everyone which has all the pages you want editable.

Restrict editing for certain IP address ranges

Schools and other institutions may want to block all edits not from a few specified IP address ranges. To do so, see Manuale:Blocco e sblocco . The only way to do this at present without modifying the code is to go to Special:Blockip and systematically rangeblock every one of the address ranges that you don't want to be able to edit. This will work for all future versions of MediaWiki. It will not work on a per-namespace basis.

Restrict editing by a particular user

Use the user blocking functionality to deprive a user of all edit access. MediaWiki does not include a possibility to give rights to separate users directly; instead rights are always given to a user group. There is no way in the core software to change permissions of particular users in order to restrict or allow editing particular pages, except by changing their usergroup.

Restrict creating of all pages

Revoking the edit right already prevents affected users from creating new pages and talk pages.

# Anonymous users can't create pages
$wgGroupPermissions['*']['createpage'] = false;

# Only users with accounts four days old or older can create pages
# Requires MW 1.6 or higher.
$wgGroupPermissions['*'            ]['createpage'] = false;
$wgGroupPermissions['user'         ]['createpage'] = false;
$wgGroupPermissions['autoconfirmed']['createpage'] = true;

Restrict creating pages in certain namespaces

There are separate rights for creating talk pages (createtalk) and creating non-talk pages (createpage). If you need per-namespace control finer than that, it is not possible in core MediaWiki, and requires an extension such as Extension:Lockdown .

Restrict access to uploaded files

→ Manual:Image authorization , img_auth.php , Manual:User rights (read)

If you have enabled the ability to upload files, these will be served directly by the underlying web server. As a result, account-based access to the file is unrestricted by default.

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Example for access restriction to uploaded files in the server configuration

If sensitive files are uploaded to an internet-accessible wiki, you may wish to add restrictions on where these can be accessed from. On Apache, if your local network were 10.1.2.*, you could restrict serving files to local addresses with:

  <Location /mediawiki/images>
    Order deny,allow
    Allow from 10.1.2.3
    Deny from all
  </Location>

Restrict viewing

Restrict viewing of all pages

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If you want anonymous users to be unable to view the wiki markup/code, you should not allow them to edit any page (see #Restrict editing of all pages above). If they can edit any page, they can use template inclusion to view even pages they can't edit. This may be possible to avoid by using $wgNonincludableNamespaces

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This method allows any visitor to view the wiki after creating an account. You may wish to combine it with #Restrict account creation above.

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Uploaded images will still be viewable to anyone who knows the image directory's name. Either point $wgUploadPath to the img_auth.php script and follow the instructions in Manual:Image authorization, or use some external method to protect images, like .htaccess.

File:OOjs UI icon notice-destructive.svg <translate> Warning:</translate> Wiki pages like MediaWiki:Common.css and MediaWiki:Gadget-foo.css may be part of a public ResourceLoader module, and thus can have their source code exposed through load.php. Turn off $wgUseSiteJs and $wgUseSiteCss to disable this functionality.

If anonymous users can't view your page, neither can search engines. Your site will not be indexed on Google.

Add this line to your LocalSettings.php file:

# Disable reading by anonymous users
$wgGroupPermissions['*']['read'] = false;

# But allow them to read e.g., these pages:
$wgWhitelistRead = [ "Main Page", "Help:Contents" ];

The $wgWhitelistRead setting allows users to view the main page. If page names have more than one word, use a space " " between them, not an underscore "_".

In addition to the main page of such a private site, you could give access to the Recentchanges page (if you think that its content isn't private) for feed readers by adding Special:Recentchanges to $wgWhitelistRead .

If you need to protect even the sidebar, main page, or login screen for any reason, it's recommended that you use higher-level authentication such as .htpasswd or equivalent.

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<translate> MediaWiki from 1.32 to 1.35.4, 1.36.2, 1.37.0 contain a security issue that allow unprivileged editing of arbitrary page and arbitrary JavaScript execution.</translate> <translate> If you are using one of these versions and can not upgrade to a newer version, please see <tvar name=1>2021-12 security release/FAQ</tvar> for a workaround.</translate>

Although Special:Listusers won't be available, it can be determined if a username is correct from Userlogin errors. You may want to give a common text for MediaWiki:wrongpassword and MediaWiki:nosuchusershort.

Restrict viewing of certain specific pages

To prevent anyone but sysops from viewing a page, it can simply be deleted . To prevent even sysops from viewing it, it can be removed more permanently using Manual:RevisionDelete . To completely destroy the text of the page, it can be manually removed from the database. In any case, the page cannot be edited while in this state, and for most purposes no longer exists.

To have a page act normally for some users but be invisible to others, as is possible for instance in most forum software, is a very different matter. MediaWiki is designed for two basic access modes:

Everyone can view every single page on the wiki (with the possible exception of a few special pages).

This is the mode used by Wikipedia and its sister projects.

Anonymous users can only view the Main Page and login page, and cannot edit any page.

This is basically the same as the above, in terms of technical implementation (just an extra check for every page view), which is why it exists. This is the mode of operation used by certain private wikis such as those used by various Wikimedia committees.

If you intend to have different view permissions than that, MediaWiki is not designed for your usage. (See T3924.) Data is not necessarily clearly delineated by namespace, page name, or other criteria, and there are a lot of leaks you'll have to plug if you want to make it so (see Security issues with authorization extensions for a sample). Other wiki software may be more suitable for your purpose. You have been warned. If you must use MediaWiki, there are three basic possibilities:

Set your wiki up private and whitelist specific pages that will be public with $wgWhitelistRead in the LocalSetting.php file.

See the section above.

Set up separate wikis with a shared user database , configure one as viewable and one as unviewable (see above), and make interwiki links between them.

Install a third-party hack or extension.

You will have to reapply it every time you upgrade the software, and it may not be updated immediately when new security fixes or upgrades of MediaWiki are released. Third-party hacks are, of course, not supported by MediaWiki developers, and if you're having problems you shouldn't ask on MediaWiki-l, #mediawiki, or other official support channels. A number of hacks are listed in Category:Page specific user rights extensions . Read about Security issues with authorization extensions if you plan to use one of those.

Restricting exporting

It is not possible to export the contents of a page that cannot be read since r19935.

Removing the Login link from all pages

One can remove the login/create account link from the upper right corner of all pages, as users can still go to Special:SpecialPages > Special:UserLogin to login. In LocalSettings.php use (tested with MediaWiki 1.16)

function NoLoginLinkOnMainPage( &$personal_urls ){
    unset( $personal_urls['login'] );
    unset( $personal_urls['anonlogin'] );
    return true;
}
$wgHooks['PersonalUrls'][]='NoLoginLinkOnMainPage';

Removing accounts

If you want to completely remove access to a user, e.g. on a simple private wiki, it's not possible to simply delete the account (unless no edits have been made ); you can block it, but the user will still be able to read pages. However, using User Merge and Delete extension you can merge the account in another one and delete the former; the original account will then "disappear". If you want to preserve history readability (i.e., to have edits from the user to be still shown under their name), you can create a new account e.g. with username "OriginalUserName (deactivated)" and then merge "OriginalUserName" into the former, or even use Renameuser extension to rename "OriginalUserName" into "AnotherUserName", then create an account under "OriginalUserName" and merge "AnotherUserName" into it: in this manner, "OriginalUserName" will be completely "usurped" (if you've set a non-null password).

Since MediaWiki 1.16.0, it is possible to set $wgBlockDisablesLogin to true to prevent access and reading to blocked users.

Other restrictions

You may want to have pages editable only by their creator, or ban viewing of history, or any of a number of other things. None of these features are available in an unhacked version of MediaWiki. If you need more fine-grained permissions, see the #See also section for links to other wiki packages that are designed for this, as well as hacks that attempt to contort MediaWiki into something it's not designed to be but may work anyway.