<\/span><\/h2>\n\n\n\nYou should set up a Firewall to prevent any unauthorized connections to\/from your server. Almost all Linux distributions either come with firewall software built in, or they can easily be added after the fact. You could use one of the built in utilities (such as UFW on Ubuntu), or you can install a firewall.<\/p>\n\n\n\n
CSF, also known as ConfigServer Security & Firewall, is a free and web-based firewall tool that can be used to protect your server from different kinds of attacks. It checks for login authentication failures on your SSH server, Mail server, FTP server, cPanel, DirectAdmin, and Webmin and can block them immediately. CSF is also able to detect many attacks, such as port scan, SYN floods, and login brute force attacks on many services.<\/p>\n\n\n\n