Fail2Ban
linux security
An intrusion prevention framework that protects computer servers from brute-force attacks by monitoring log files and banning IPs with too many failed attempts.
intrusion preventionbrute forceautomation
Legal & Ethical Use
- Server protection
- Brute force prevention
- Log monitoring
- Automated blocking
Installation
bash
$
sudo apt install fail2banBasic Commands
bash
$
sudo systemctl start fail2banStart fail2ban service
bash
$
sudo fail2ban-client statusCheck status
bash
$
sudo fail2ban-client status sshdCheck SSH jail status
bash
$
sudo fail2ban-client set sshd unbanip IPUnban an IP address
Advantages
- Automated protection
- Highly configurable
- Log-based detection
- Active community
Limitations
- Can block legitimate users
- Configuration needed
- Regex complexity