#!/usr/sbin/nft -f
# vim: ft=nftables

# SPDX-FileCopyrightText: 2022 unman <unman@thirdeyesecurity.org>
# SPDX-FileCopyrightText: 2023 1cho1ce <https://github.com/1cho1ce>
# SPDX-FileCopyrightText: 2023 Benjamin Grande M. S. <ben.grande.b@gmail.com>
#
# SPDX-License-Identifier: GPL-3.0-or-later

add chain ip  qubes output { type filter hook output priority 0; policy accept; }
add chain ip6 qubes output { type filter hook output priority 0; policy accept; }

## Stop leaks between downstream (vif+) and upstream (eth0)
#chain ip  qubes forward { policy drop; }
#chain ip  qubes input   { policy drop; }
#chain ip  qubes output  { policy drop; }
#chain ip6 qubes forward { policy drop; }
#chain ip6 qubes input   { policy drop; }
#chain ip6 qubes output  { policy drop; }

insert rule ip  qubes custom-forward oifgroup 1 drop
insert rule ip  qubes custom-forward iifgroup 1 drop
insert rule ip6 qubes custom-forward oifgroup 1 drop
insert rule ip6 qubes custom-forward iifgroup 1 drop

## Accept forward traffic between dowstream vif+ (group 2) and VPN (group 9)
#insert rule ip  qubes custom-forward iifgroup 2 oifgroup 9 accept
#insert rule ip  qubes custom-forward iifgroup 9 oifgroup 2 accept
#insert rule ip6 qubes custom-forward iifgroup 2 oifgroup 9 accept
#insert rule ip6 qubes custom-forward iifgroup 9 oifgroup 2 accept

## Drop ICMP
insert rule ip  qubes custom-input      meta l4proto icmp drop
insert rule ip6 qubes custom-input      meta l4proto icmp drop
insert rule ip  qubes output oifgroup 1 meta l4proto icmp drop
insert rule ip6 qubes output oifgroup 1 meta l4proto icmp drop

## Allow traffic from the "qvpn" group to the uplink interface (eth0);
## Our VPN client will run with group "qvpn".
#insert rule ip  qubes output oifname "lo"            accept
#insert rule ip  qubes output oifgroup 1 skgid "qvpn" accept
#insert rule ip6 qubes output oifname "lo"            accept
#insert rule ip6 qubes output oifgroup 1 skgid "qvpn" accept