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How to unban an IP in Fail2Ban
bash
sudo fail2ban-client status
sudo fail2ban-client status sshd
sudo fail2ban-client set sshd unbanip <ip_address>
# other jails: postfix, dovecot, yunohost, vaultwarden, kanboard, ntfy, httpsh, recidive, ...Fail2Ban reference lists the 13 jails.