Extend and customize Drupal functionality with contributed modules.
If a module doesn't quite do what you want it to do, if you find a bug or have a suggestion, then join forces and help the module maintainer. Or, share your own by starting a new module.
A CAPTCHA is a challenge-response test most often placed within web forms to determine whether the user is human. The purpose of CAPTCHA is to block form submissions by spambots, which are automated scripts that post spam content everywhere they can. The CAPTCHA module provides this feature to virtually any user facing web form on a Drupal site.
We do this our spare time, which is unfortunately almost nonexistent at the moment due to real life obligations. To give the CAPTCHA module the required level of maintenance, an extra co-maintainer would be welcome. If you're interested in helping with this very popular module, please contact me or open an issue in the CAPTCHA module issue tracker.
The Masquerade module allows site administrators (or anyone with enough permissions) to switch users and surf the site as that user (no password required). That person can switch back to their own user account at any time.
This is helpful for site developers when trying to determine what a client, logged in as themselves, might see when logged into the site.
The Login Destination module allows you to customize the destination that a user is redirected to after logging in, registering to the site (7.x), using a one-time login link or logging out (7.x). The destination can be an internal page or an external URL. It is possible to specify certain conditions like referring pages or user roles and make the destination depend upon them. You may use PHP snippets to provide custom conditions and destinations. It is also possible to keep users on the currently visited page after logging in or out.
The ACL module, short for Access Control Lists, is an API for other modules to create lists of users and give them access to nodes. It has no UI of its own and will not do anything by itself; install this module only if some other module tells you to.
We're aware of the following modules using ACL (let us know if you know of others):
Content Access (optionally uses ACL to provide by-user access control)
The Override Node Options module allows permissions to be set to each field within the Authoring information and Publishing options field sets on the node form. It also allows selected field sets to be set as collapsed and / or collapsible.
Download, unpack and place in sites/all/modules/
Adjust access control in admin/user/permissions
Adjust Fieldset options in admin/settings/override_node_options
Note: Autocomplete "Authored by" field only works if user has "Access user profiles" permission.
The Lightweight Directory Access Protocol (LDAP) project provides integration with LDAP for authentication, user provisioning, authorization, feeds, and views. It also provides apis and building blocks (query and server configuration storage) for other modules.
By default, Drupal allows only users with "administrer menu permission" to add, modify or delete menu items.
In case you want for instance to let certain users manage primary links or secondary links but not navigation menu, this module provides this functionality.
This module provides a way to enforce restrictions on user passwords by defining password policies.
A password policy can be defined with a set of constraints which must be met before a user password change will be accepted. Each constraint has a parameter allowing for the minimum number of valid conditions which must be met before the constraint is satisfied.
Nodeaccess is a Drupal access control module which provides view, edit and delete access to nodes. Users with the 'grant node permissions' permission will have a grant tab on node pages which allows them to grant access to that node by user or role. Administrators can set default access controls per content type, and also define which roles are available to grant permissions to on the node grants tab.
The upshot is, this module allows you to do things like 'node 123 can be viewed by authenticated users and edited by admin users and joeuser'. As an added bonus, update and delete permissions are separated, so you can make sure users with edit permissions cannot accidentally delete pages.
The previous maintainer (chadcf) had released a dev version of nodeaccess for D7. Over the following months a number of bugs/issues were reported and as of May 7th, 2013, all bug reports in the issue queue have been addressed (where possible) and with that, version 7.x-1.0 has been released as a stable/recommended release for Drupal 7.
Spambot protects the user registration form from spammers and spambots by verifying registration attempts against the Stop Forum Spam (www.stopforumspam.com) online database. It also adds some useful features to help deal with spam accounts.
This module works well for sites which require user registration before posting is allowed (which is most forums).
The purpose of Spamicide is to prevent spam submission to any form on your Drupal web site. Spamicide adds an input field to each form then hides it with css, when spam bots fill in the field the form is discarded. The field, and matching .css file, are named in such a way as to not let on that it is a spam defeating device, and can be set by admins to almost anything they like(machine readable please). If logging is set, the log will show if and when a particular form has been compromised, and the admin can change the form's field name (and corresponding .css file) to something else.
Secure Login module enables the user login and other forms to be submitted securely via HTTPS, thus preventing passwords and other private user data from being transmitted in clear text. Secure Login module locks down not just the user/login page but also any page containing the user login block (or other forms that you configure to be secured).
The CAPTCHA Pack module contains several CAPTCHA types for use with the CAPTCHA module. The CAPTCHA Pack module is meant to provide lightweight, yet effective alternatives for the traditional image CAPTCHA, which is undesirable in certain situation (e.g. bandwidth restrictions, cpu restrictions, accessibility constraints, etc).
Fostering a relationship of trust with your visitors is essential when you aim to collect personal information and provide a service with which they feel secure. With this familiar little feature added to your installation you will portray the message of making every effort to address your users' security concerns and put them at ease. It shows that you stop at nothing to go the extra mile and allow them the peace of mind, to access your site with confidence from anywhere in the world knowing that you have taken every precaution to ensure their identity is safe.
Did you know that the default Drupal behaviour is to remember your session for the extent of 3 weeks and 2 days. This entails that if a user abandons a workstation, closes the browser window, experiences a power failure or any other unforeseen circumstance where they refrain from logging out, that their session will stay active on the server. When, at a later stage, they or anyone else for that matter, returns to your site using the same browser within the session cookie lifetime they will automatically be logged in without being prompted for authentication credentials. Can you imagine the colossal risk this places on users accessing your service from public terminals or shared workstations, with no means to their disposal of securing themselves against this threat.