dotfiles/nixos/systems/omen/firewall.nix
magic_rb 5847433546
Allow for use of both ethernet adapters
Signed-off-by: magic_rb <magic_rb@redalder.org>
2024-05-14 23:19:27 +02:00

242 lines
8.8 KiB
Nix

{
secret,
inputs',
pkgs,
lib,
...
}: {
networking.notnft.postStop = ''
if systemctl status podman ; then
${lib.getExe' pkgs.podman "podman"} network reload -a
fi
'';
networking.notnft.postStart = ''
if systemctl status podman ; then
${lib.getExe' pkgs.podman "podman"} network reload -a
fi
'';
networking.notnft.rules = let
notnft = inputs'.notnft.lib.${pkgs.stdenv.system};
logRule = with notnft.dsl;
with payload;
prefix: [
(log {
prefix = "${prefix} dropped: ";
flags = f: [f.all];
})
];
traceChain = with notnft.dsl;
with payload;
add chain
[(mangle meta.nftrace 1)];
in
with notnft.dsl;
with payload;
ruleset {
filter = add table {family = f: f.inet;} {
trace = traceChain;
### lo
input-lo =
add chain
[accept];
output-lo =
add chain
[accept];
###
### wlan0
input-wlan0 =
add chain
[(is.eq ip.protocol (f: f.tcp)) (is.eq th.dport "8080") accept]
[(is.eq ip.protocol (f: f.udp)) (is.eq th.dport "20111") accept]
[(is.eq ip.protocol (f: f.tcp)) (is.eq th.dport "27036") accept]
[(is.eq ip.protocol (f: f.udp)) (is.eq th.dport (set [27031 27032 27033 27034 27035 27036])) accept];
output-wlan0 =
add chain
[(is.ne ip.daddr (secret.network.ips.blowhole.ip or "")) (is.eq ip.protocol (f: with f; set [tcp udp])) (is.eq th.dport 53) drop]
[accept];
###
### wlan0
input-eth0 =
add chain;
output-eth0 =
add chain
[(is.ne ip.daddr (secret.network.ips.blowhole.ip or "")) (is.eq ip.protocol (f: with f; set [tcp udp])) (is.eq th.dport 53) drop]
[accept];
###
### wg0
input-wg0 =
add chain
# accept syncthing sharing
[(is.eq ip.protocol (f: f.udp)) (is.eq th.sport "22000") (is.eq th.dport "22000") accept]
[(is.eq ip.protocol (f: f.tcp)) (is.eq th.dport "22000") accept]
[(is.eq ip.protocol (f: f.icmp)) accept];
output-wg0 =
add chain
# TCP, UDP 53 to blowhole
[(is.eq ip.protocol (f: with f; set [udp tcp])) (is.eq th.dport 53) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.blowhole.ip or "")) accept]
# TCP 22, 80, 4646, 8200, 8500, 2049 to blowhole
[(is.eq ip.protocol (f: with f; set [tcp])) (is.eq th.dport (set [22 80 4646 8200 8500 2049])) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.blowhole.ip or "")) accept]
# NFS services to blowhole
[(is.eq ip.protocol (f: with f; set [tcp udp])) (is.eq th.dport (set [111 2049 4000 4002 20048])) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.blowhole.ip or "")) accept]
# TCP 22, 4646, 8200 toothpick
[(is.eq ip.protocol (f: with f; set [tcp])) (is.eq th.dport (set [22 4646 8200])) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.toothpick or "")) accept]
# TCP 22 altra
[(is.eq ip.protocol (f: with f; set [tcp])) (is.eq th.dport (set [22])) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.altra.ip or "")) accept]
# TCP 22 heater
[(is.eq ip.protocol (f: with f; set [tcp])) (is.eq th.dport (set [22])) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.heater or "")) accept]
[(is.eq ip.protocol (f: with f; set [udp])) (is.eq th.dport (set [2302 2303 2304])) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.heater or "")) accept]
# ICMP to blowhole, toothpick, altra
[(is.eq ip.protocol (f: f.icmp)) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (set [(secret.network.ips.toothpick or "") (secret.network.ips.altra.ip or "") (secret.network.ips.blowhole.ip or "")])) accept]
[(is.eq ip.protocol (f: f.tcp)) (is.eq th.dport 8883) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr (secret.network.ips.altra.ip or "")) accept]
# accept syncthing sharing
[(is.eq ip.protocol (f: f.tcp)) (is.eq th.dport 554) (is.eq ip.saddr (secret.network.ips.omen.vpn or "")) (is.eq ip.daddr "10.64.2.128") accept]
[(is.eq ip.protocol (f: f.udp)) (is.eq th.sport "22000") (is.eq th.dport "22000") accept]
[(is.eq ip.protocol (f: f.tcp)) (is.eq th.dport "22000") accept];
###
input =
add chain {
type = f: f.filter;
hook = f: f.input;
prio = -300;
policy = f: f.drop;
}
# accept related, established and drop invalid
[
(vmap ct.state {
established = accept;
related = accept;
invalid = drop;
})
]
# # accept icmp between the same IP
# [ (is.eq ip.protocol (f: f.icmp)) (is.eq ip.daddr ip.saddr) accept ]
[(jump "trace")]
[(is.eq meta.iifname "wlan0") (jump "input-wlan0")]
[(is.eq meta.iifname (set ["eth0" "eth1"])) (jump "input-eth0")]
[(is.eq meta.iifname "lo") (jump "input-lo")]
[(is.eq meta.iifname "wg0") (jump "input-wg0")]
[(is.eq ip.protocol (f: f.icmp)) accept]
(logRule "Input");
output =
add chain {
type = f: f.filter;
hook = f: f.output;
prio = -300;
policy = f: f.drop;
}
[(jump "trace")]
[(is.eq meta.oifname "wlan0") (jump "output-wlan0")]
[(is.eq meta.oifname (set ["eth0" "eth1"])) (jump "output-eth0")]
[(is.eq meta.oifname "lo") (jump "output-lo")]
[(is.eq meta.oifname "wg0") (jump "output-wg0")]
(logRule "Output");
forward =
add chain {
type = f: f.filter;
hook = f: f.forward;
prio = -300;
policy = f: f.drop;
}
[(jump "trace")]
# accept masquaraded packets incoming from wg0
[
(is.eq meta.iifname (set ["wg0" "wlan0" "eth0"]))
(vmap ct.state {
established = accept;
related = accept;
})
]
[(is.eq meta.iifname "podman0") (is.eq meta.oifname "wg0") (is.eq ip.protocol (f: with f; set [tcp udp])) (is.eq th.dport 53) (is.eq ip.daddr (secret.network.ips.blowhole.ip or "")) accept]
(logRule "Forward");
prerouting =
add chain {
type = f: f.nat;
hook = f: f.prerouting;
prio = -199;
policy = f: f.accept;
}
# [(jump "trace")]
;
postrouting =
add chain {
type = f: f.nat;
hook = f: f.postrouting;
prio = -199;
policy = f: f.accept;
}
# [(jump "trace")]
;
};
bridge-t = add table {family = f: f.bridge;} {
trace = traceChain;
input =
add chain {
type = f: f.filter;
hook = f: f.input;
prio = f: f.filter;
policy = f: f.drop;
}
[(jump "trace")]
[
(vmap ct.state {
established = accept;
related = accept;
invalid = drop;
})
]
[(is.eq meta.protocol (f: f.arp)) accept]
(logRule "Bridge input");
output =
add chain {
type = f: f.filter;
hook = f: f.output;
prio = f: f.out;
policy = f: f.drop;
}
[(is.eq ether.type (f: f.arp)) accept]
(logRule "Bridge output");
forward =
add chain {
type = f: f.filter;
hook = f: f.forward;
prio = f: f.filter;
policy = f: f.drop;
}
(logRule "Bridge forward");
prerouting = add chain {
type = f: f.filter;
hook = f: f.prerouting;
prio = f: f.dstnat;
policy = f: f.accept;
};
postrouting = add chain {
type = f: f.filter;
hook = f: f.postrouting;
prio = f: f.srcnat;
policy = f: f.accept;
};
};
};
}