depot/nixos/tests/firewall.nix
Luke Granger-Brown 57725ef3ec Squashed 'third_party/nixpkgs/' content from commit 76612b17c0ce
git-subtree-dir: third_party/nixpkgs
git-subtree-split: 76612b17c0ce71689921ca12d9ffdc9c23ce40b2
2024-11-10 23:59:47 +00:00

85 lines
2.8 KiB
Nix

# Test the firewall module.
import ./make-test-python.nix ( { pkgs, nftables, ... } : {
name = "firewall" + pkgs.lib.optionalString nftables "-nftables";
meta = with pkgs.lib.maintainers; {
maintainers = [ rvfg garyguo ];
};
nodes =
{ walled =
{ ... }:
{ networking.firewall = {
enable = true;
logRefusedPackets = true;
# Syntax smoke test, not actually verified otherwise
allowedTCPPorts = [ 25 993 8005 ];
allowedTCPPortRanges = [
{ from = 980; to = 1000; }
{ from = 990; to = 1010; }
{ from = 8000; to = 8010; }
];
interfaces.eth0 = {
allowedTCPPorts = [ 10003 ];
allowedTCPPortRanges = [ { from = 10000; to = 10005; } ];
};
interfaces.eth3 = {
allowedUDPPorts = [ 10003 ];
allowedUDPPortRanges = [ { from = 10000; to = 10005; } ];
};
};
networking.nftables.enable = nftables;
services.httpd.enable = true;
services.httpd.adminAddr = "foo@example.org";
specialisation.different-config.configuration = {
networking.firewall.rejectPackets = true;
};
};
attacker =
{ ... }:
{ services.httpd.enable = true;
services.httpd.adminAddr = "foo@example.org";
networking.firewall.enable = false;
};
};
testScript = { nodes, ... }: let
unit = if nftables then "nftables" else "firewall";
in ''
start_all()
walled.wait_for_unit("${unit}")
walled.wait_for_unit("httpd")
attacker.wait_for_unit("network.target")
# Local connections should still work.
walled.succeed("curl -v http://localhost/ >&2")
# Connections to the firewalled machine should fail, but ping should succeed.
attacker.fail("curl --fail --connect-timeout 2 http://walled/ >&2")
attacker.succeed("ping -c 1 walled >&2")
# Outgoing connections/pings should still work.
walled.succeed("curl -v http://attacker/ >&2")
walled.succeed("ping -c 1 attacker >&2")
# Open tcp port 80 at runtime
walled.succeed("nixos-firewall-tool open tcp 80")
attacker.succeed("curl -v http://walled/ >&2")
# Reset the firewall
walled.succeed("nixos-firewall-tool reset")
attacker.fail("curl --fail --connect-timeout 2 http://walled/ >&2")
# If we stop the firewall, then connections should succeed.
walled.stop_job("${unit}")
attacker.succeed("curl -v http://walled/ >&2")
# Check whether activation of a new configuration reloads the firewall.
walled.succeed(
"/run/booted-system/specialisation/different-config/bin/switch-to-configuration test 2>&1 | grep -qF ${unit}.service"
)
'';
})