fail2ban(1) on Linux
The text 406f3036a8a5, as Arch Linux 2026-11-01, Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
a set of server and client programs to limit brute force authentication attempts.