There are many reasons why you might want to block a user from your website. They could be trying to gain access to passwords, sending spam, or harassing users on a forum or comments section of your site. One way to stop them is to block their IP address. It is not fool proof, as some people may have dynamic IPs or use a fake IP address. Still, it may be a good temporary solution.
cPanel provides a tool that makes blocking IP addresses very easy. To use it, do the following:
- Login to cPanel
- In the security section, click “IP Deny Manager”
- Type the IP address into the box
- Click “Add”
That IP address will stay banned as long as you have it on your list, so you should make sure that it is one that you actually want to ban. You can also ban entire ranges of IP addresses like the following:
11.12. (implies everything in 11.12.*.* will be blocked)
In addition to IP addresses, you can also ban fully qualified domain names (FQDN). Whenever you want to unban an IP address or domain, simply click the “x” button next to the address under the “Remove” header.
As stated above, the effectiveness of an IP ban largely depends on the stability of the address. If you are sure the user will continue to have that IP address, the ban will be effective. Otherwise, it may only be a temporary solution to a problem that necessitates more creative security measures.