{ # Enable SSH services = { openssh = { enable = true; settings = { PermitRootLogin = "no"; PrintLastLog = "no"; PasswordAuthentication = false; }; }; # Block nefarious SSH connections fail2ban = { enable = true; maxretry = 5; bantime = "5m"; ignoreIP = [ "10.0.0.0/24" ]; }; }; }