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# Test the firewall module.
import ./make-test-python.nix ( { pkgs, nftables, ... } : {
name = "firewall" + pkgs.lib.optionalString nftables "-nftables";
meta = with pkgs.lib.maintainers; {
maintainers = [ eelco ];
};
nodes =
{ walled =
{ ... }:
{ networking.firewall.enable = true;
networking.firewall.logRefusedPackets = true;
networking.nftables.enable = nftables;
services.httpd.enable = true;
services.httpd.adminAddr = "foo@example.org";
};
# Dummy configuration to check whether firewall.service will be honored
# during system activation. This only needs to be different to the
# original walled configuration so that there is a change in the service
# file.
walled2 =
{ ... }:
{ networking.firewall.enable = true;
networking.firewall.rejectPackets = true;
networking.nftables.enable = nftables;
};
attacker =
{ ... }:
{ services.httpd.enable = true;
services.httpd.adminAddr = "foo@example.org";
networking.firewall.enable = false;
};
};
testScript = { nodes, ... }: let
newSystem = nodes.walled2.config.system.build.toplevel;
unit = if nftables then "nftables" else "firewall";
in ''
start_all()
walled.wait_for_unit("${unit}")
walled.wait_for_unit("httpd")
attacker.wait_for_unit("network.target")
# Local connections should still work.
walled.succeed("curl -v http://localhost/ >&2")
# Connections to the firewalled machine should fail, but ping should succeed.
attacker.fail("curl --fail --connect-timeout 2 http://walled/ >&2")
attacker.succeed("ping -c 1 walled >&2")
# Outgoing connections/pings should still work.
walled.succeed("curl -v http://attacker/ >&2")
walled.succeed("ping -c 1 attacker >&2")
# If we stop the firewall, then connections should succeed.
walled.stop_job("${unit}")
attacker.succeed("curl -v http://walled/ >&2")
# Check whether activation of a new configuration reloads the firewall.
walled.succeed(
"${newSystem}/bin/switch-to-configuration test 2>&1 | grep -qF ${unit}.service"
)
'';
})
|
