fail2ban-client

Control fail2ban

medium risk

interactive breakdown — edit the command and press Explain
$ 
⚠ Risks & cautions
What it does

Queries and manages jails and banned IPs.

Common flags
FlagMeaning
statusOverall status
set <jail> unbanipUnban an IP
set <jail> banipBan an IP
reloadReload configuration
Examples
fail2ban-client status sshdShow banned IPs · explain & risk-check →
fail2ban-client set sshd unbanip 203.0.113.9Unban an address · explain & risk-check →
Related
ufw iptables journalctl
Open the full explainer →More in Users, Permissions & Security

Reference text is hand-written and may be incomplete — check man fail2ban-client for your version. Test destructive commands on a non-production system first.