networking.firewall.backend

Underlying implementation for the firewall service.

Type

one of "iptables", "nftables", "firewalld"

Default

if config.services.firewalld.enable then
  "firewalld"
else if config.networking.nftables.enable then
  "nftables"
else
  "iptables"

Declared

<nixpkgs/nixos/modules/services/networking/firewall.nix>