The sshlockout table provides a list of IP addresses that have been blacklisted due to repeated SSH login failures, such as those using dictionary or other brute force attacks.
If an attacker attempts to SSH into the pfSense firewall and fails 15 attempts at guessing a username and password, the attacker's IP address will be added to this table. Any subsequent SSH attempts from this IP address will be blocked by pfSense.
- Entries that exist in this table, that are equal to or older than 3600 seconds, will be expired every hour.
- No checks are made to distinguish between local IP addresses, local networks or prior good logins.