Dealing with a problem user
From Joomla! Documentation
The best method of dealing with a problem user is not to delete the account. It is better to simply block them from logging in. This is true for a few different reasons:
- First, it is temporary, so it can be used to suspend rather than ban.
- Second, if you are requiring your users to authenticate via email and you are not allowing duplicate email addresses, it will make it slightly more difficult for them to simply recreate their account or create a new account.
- From the Main Administrator Screen (http://www.example.com/administrator), click User Manager.
- Locate the problem user using the filter. The easiest way to do this if you have a large number of users is to type part of their name, user name, or email address in the search box and click Go.
- Select the user by placing a checkmark next to their name.
- At the top right of the screen, click Edit.
- On the lefthand side of the screen, towards the bottom, select the Yes radio button next to Block User.
- At the top right of the screen, click Save.
- Visually verify the user is blocked by looking for both the Successfully saved User message at the top of the screen, as well as the icon with the white X in a red circle under the Enabled column.
Blocking By IP Address
While there are some extensions that will allow for blocking by IP address, Joomla! does not include this functionality by default. Additionally, please note that as discussed in the Security and Performance FAQs, this method is not recommended because it is less effective for the following reasons:
- First, because the problem user may not actually be the owner of the IP address.
- Second, because most IP addresses are non-static, so they will change periodically. For example, if the person is using a wireless laptop, and simply moves to a different wireless router, they will end up with a new IP address.