Fail2ban: self-service modification of SSH ports and prevention of SSH brute force cracking

Introduction to Fail2ban <br />This is a script that uses iptables and the open source program fail2ban to perform simple anti-exploitation on servers. SSH defense rules are provided by default.

Fail2ban function <br />Self-service modification of SSH port to customize the maximum time for banning IP (in hours)
Customize the number of SSH connection attempts to prevent brute force cracking with one click

Fail2ban supported systems
Centos 6/7 (x86/x64)
Ubuntu 14.04 (x86/x64)
Ubuntu 16.10 (x86/x64)
Debian 7 (x86/x64)
Debian 8 (x86/x64)

The following operations are all performed under SSH, as root user.
Installation of Fail2ban

 wget --no-check-certificate https://zhujiwiki.com/wp-content/uploads/2018/07/fail2ban.sh && bash fail2ban.sh 2>&1 | tee fail2ban.log

Uninstalling Fail2ban

 wget --no-check-certificate https://zhujiwiki.com/wp-content/uploads/2018/07/unfail2ban.sh && bash unfail2ban.sh

Precautions
After the installation is complete, please restart the SSH service and reconnect the SSH session. <br />If SSH cannot connect, please check whether the SSH port has been modified. Please fill in the correct port after the modification to connect.

via: https://github.com/FunctionClub/Fail2ban