nixos/nat: substitute iptables for compat under nftables #85462
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(Migrated from #84949 due to a wonderful demonstration of PEBKAC)
Motivation for this change
Currently, NAT will not work if you have nftables enabled (and therefore default firewall disabled (and therefore ip_tables unloaded/blacklisted)). This allows those using nftables to enable nat and have it work with minimal code change, thanks to the good work of those who created iptables-nftables-compat.
Debugging why my containers had no network access was a pain, this change fixed my issue, I'm using it right now.
Things done
sandbox
innix.conf
on non-NixOS linux)nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
./result/bin/
)nix path-info -S
before and after)