Merge pull request #82801 from Izorkin/fail2ban

nixos/fail2ban: add warning if work fail2ban without firewall

nixos/modules/services/security/fail2ban.nix

···
 
   config = mkIf cfg.enable {
 
+    warnings = mkIf (config.networking.firewall.enable == false || config.networking.nftables.enable == false) [
+      "fail2ban can not be used without a firewall"
+    ];
+
     environment.systemPackages = [ cfg.package ];
 
     environment.etc = {