This is a small tutorial on how to prevent brute force attacks to the SMTP server container included into Postal Server using Fail2ban. As logs are sent to stdout, it is necessary to write them to a ...

Fail2Ban scans log files like /var/log/auth.log and bans IP addresses conducting too many failed login attempts. It does this by updating system firewall rules to reject new connections from those IP ...

The fail2ban tool in Linux monitors system logs for signs of attacks, putting offending systems into what is called “jail”, and modifying firewall settings. It shows what systems are in jail at any ...