sudo grep -E '^(bantime|findtime|maxretry)' /etc/fail2ban/jail.local

jail.local is the override file where local fail2ban settings belong (jail.conf holds the shipped defaults). This grep pulls the three tuning knobs — bantime (ban duration), findtime (counting window), maxretry (failure threshold) — so you can see the effective policy at a glance. Values here override the defaults in jail.conf.