How Fail2Ban Can Secure Your SmartVPS & Stack Server for SSH Login Protection

Fail2Ban is an application which bans IP addresses from logging into your Linux SmartVPS or Linux Stack Server after too many failed login attempts. Since legitimate logins usually take no more than 3 tries to happen (and with SSH keys, no more than 1), a server being spammed with unsuccessful logins indicates malicious attempts to access your Linode.

Fail2Ban can monitor a variety of protocols including SSH, HTTP, and SMTP. By default, Fail2Ban monitors SSH only, and is a helpful security deterrent for any server since the SSH daemon is usually configured to run constantly and listen for connections from any remote IP address.

For complete instructions on installing and configuring Fail2Ban, see theĀ guide:

  1. Secure SSH with Fail2Ban
  2. How to protect SSH with fail2ban
  3. Preventing Brute Force Attacks With Fail2ban On Debian Etch
  4. How To Protect SSH with Fail2Ban on Ubuntu 14.04
  5. HowTo : Install and Configure Fail2ban on CentOS/Ubuntu