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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.orbekk.router;
devices = ["eno1" "eno2"];
mullvadMark = 2;
heMark = 1;
router-netns-up = pkgs.writeScript "router-netns-up" ''
#!${pkgs.bash}/bin/bash
ip netns add router
ip netns exec router ip link set lo up
${lib.concatMapStrings (device: ''
ip link set ${device} netns router
'')
devices}
ip link add router-vport type veth peer name dragon-vport netns router
ip netns exec router ${pkgs.procps}/bin/sysctl -w net.ipv4.conf.default.forwarding=1
ip netns exec router ${pkgs.procps}/bin/sysctl -w net.ipv4.conf.all.forwarding=1
ip netns exec router ${pkgs.procps}/bin/sysctl -w net.ipv6.conf.default.forwarding=1
ip netns exec router ${pkgs.procps}/bin/sysctl -w net.ipv6.conf.all.forwarding=1
'';
router-netns-down = pkgs.writeScript "router-netns-down" ''
#!${pkgs.bash}/bin/bash
ip netns del router
'';
router-config = { config, lib, pkgs, ... }: {
system.stateVersion = "22.05";
environment.systemPackages = with pkgs; [ tcpdump ];
virtualisation.vswitch.enable = true;
virtualisation.vswitch.resetOnStart = true;
networking.vswitches.kjlan = {
interfaces.wan-vport = { vlan = 10; type = "internal"; };
interfaces.lan-vport = { vlan = 100; type = "internal"; };
interfaces.servers-vport = { vlan = 20; type = "internal"; };
interfaces.admin-vport = { vlan = 255; type = "internal"; };
interfaces.dragon-vport = { vlan = 20; };
extraOvsctlCmds = ''
add-bond kjlan bond0 eno1 eno2 lacp=active
set interface wan-vport mac=\"3c:97:0e:19:7e:5c\"
'';
};
networking.interfaces.eno1 = {};
networking.interfaces.eno2 = {};
networking.interfaces.wan-vport = {
useDHCP = true;
};
networking.interfaces.lan-vport = {
ipv4.addresses = [{address = "172.20.100.1"; prefixLength = 24;}];
};
networking.interfaces.servers-vport = {
ipv4.addresses = [{address = "172.20.20.1"; prefixLength = 24;}];
ipv6.addresses = [{address = "2001:470:8e2e:20::1"; prefixLength = 64;}];
};
networking.interfaces.admin-vport = {
ipv4.addresses = [{address = "10.10.255.18"; prefixLength = 24;}];
ipv4.routes = [{address = "10.10.255.0"; prefixLength = 24;}];
};
networking.sits.he0 = {
dev = "wan-vport";
remote = "209.51.161.14";
};
networking.interfaces.he0.ipv6.addresses = [{
address = "2001:470:1f06:1194::2";
prefixLength = 64;
}];
systemd.services.he0-netdev.after = ["kjlan-netdev.service"];
networking.iproute2.enable = true;
networking.iproute2.rttablesExtraConfig = ''
${toString mullvadMark} mullvad
${toString heMark} he
'';
systemd.services.network-route-setup = {
description = "HE tunnel route setup";
requires = [ "network-online.target" ];
after = [ "network.target" "network-online.target" ];
wantedBy = [ "multi-user.target" ];
path = [ pkgs.iproute ];
script = ''
ip -6 rule add fwmark ${toString heMark} table he || true
ip -6 route replace default dev he0 table he
ip -6 route flush cache
ip rule add fwmark ${toString mullvadMark} table mullvad || true
ip route replace default dev mullvad table mullvad
ip route flush cache
'';
};
services.dnsmasq = {
enable = true;
servers = [ "1.1.1.1" "8.8.8.8" "8.8.4.4" ];
resolveLocalQueries = false;
extraConfig = ''
no-resolv
no-hosts
log-debug
dhcp-authoritative
enable-ra
address=/localhost/::1
address=/localhost/127.0.0.1
dhcp-range=tag:servers-vport,172.20.20.10,172.20.20.254,5m
dhcp-option=tag:servers-vport,option:router,172.20.20.1
dhcp-option=tag:servers-vport,option:dns-server,172.20.20.1
dhcp-range=tag:servers-vport,::2,::1000,constructor:servers-vport,2h
dhcp-host=id:dragon,tag:servers-vport,172.20.20.2
dhcp-host=id:00:01:00:01:21:a2:4e:a8:d0:bf:9c:45:a6:ec,tag:servers-vport,[::d]
# dhcp-host=id:dragon,::d
dhcp-range=tag:lan-vport,172.20.100.10,172.20.100.254,5m
dhcp-option=tag:lan-vport,option:router,172.20.100.1
dhcp-option=tag:lan-vport,option:dns-server,172.20.100.1
'';
};
networking.dhcpcd = {
enable = true;
extraConfig = ''
noipv6rs
noipv6
nohook resolv.conf
interface wan-vport
dhcp
'';
};
networking.firewall.enable = false;
systemd.services.nftables.before = mkForce ["network.target"];
systemd.services.nftables.after = ["kjlan-netdev.service"];
systemd.services.nftables.wantedBy = ["network.target"];
networking.nftables.enable = true;
networking.nftables.ruleset =
let
ports-to-csv = ports: concatStringsSep "," (map toString ports);
in ''
table inet filter {
chain input {
type filter hook input priority 0
iif lo accept
ct state {established, related} counter accept
meta l4proto {tcp, udp} th dport {bootps, bootpc, domain, dhcpv6-client, dhcpv6-server} counter accept
ip protocol ipv6 counter accept comment "sit tunnel"
ip protocol icmp limit rate 4/second counter accept comment "icmp v4"
ip6 nexthdr ipv6-icmp counter accept comment "accept all ICMP types"
iif wan-vport counter drop
meta nftrace set 1
counter drop
}
chain output {
type filter hook output priority 0
counter accept
}
chain forward {
type filter hook forward priority 0; policy drop
ct state vmap { established : accept, related : accept, invalid : drop }
iif lan-vport counter accept
iif servers-vport counter accept
counter drop
}
}
table inet mangle {
chain prerouting {
type filter hook prerouting priority -150
ip6 saddr 2001:470:8e2e::/48 ip6 daddr != 2001:470:8e2e::/48 ip6 daddr != fe80::/64 meta nftrace set 1
ip6 saddr 2001:470:8e2e::/48 ip6 daddr != 2001:470:8e2e::/48 ip6 daddr != fe80::/64 meta mark set ${toString heMark}
}
}
table ip nat {
chain prerouting {
type nat hook prerouting priority -100; policy accept
}
chain postrouting {
type nat hook postrouting priority 100; policy accept
ip saddr 172.16.0.0/12 oif {"wan-vport"} masquerade
}
}
'';
};
in {
options = {
orbekk.router = {
enable = mkEnableOption "Enable router config";
};
};
config = mkIf cfg.enable {
boot.kernel.sysctl = {
"net.ipv4.conf.all.forwarding" = true;
"net.ipv4.conf.default.forwarding" = true;
"net.ipv6.conf.all.forwarding" = true;
"net.ipv6.conf.default.forwarding" = true;
};
systemd.services."router-netns" = {
description = "router network namespace";
before = ["network.target"];
after = ["network-interfaces.target"];
path = with pkgs; [bash iproute];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = "yes";
ExecStart = "${router-netns-up}";
ExecStop = "${router-netns-down}";
};
};
orbekk.mullvad.enable = true;
networking.wireguard.interfaces.mullvad.interfaceNamespace = "router";
systemd.services."container@router" = {
after = ["router-netns.service"];
requires = ["router-netns.service"];
wantedBy = ["network.target"];
};
containers.router = {
autoStart = true;
extraFlags = ["--network-namespace-path" "/var/run/netns/router"];
privateNetwork = false;
config = router-config;
additionalCapabilities = ["CAP_SYS_ADMIN" "CAP_NET_ADMIN"];
};
services.ddclient = {
enable = true;
configFile = "/opt/secret/he-ddclient.conf";
};
# FIXME: Workaround for ddclient.conf not being available to ddclient.
systemd.services.ddclient.serviceConfig.DynamicUser = lib.mkForce false;
};
}
|
