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ma wireguard: ensure correct routing on server

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This commit is contained in:
makefu 2023-06-03 15:37:11 +02:00
parent b6c10cbc85
commit 4cb18d5b6f
2 changed files with 44 additions and 27 deletions
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1
2configs/wireguard/server.nix
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@ -17,7 +17,6 @@ in { # wireguard server
externalInterface = ext-if;
internalInterfaces = [ "wg0" ];
};
networking.wireguard.interfaces.wg0 = {
ips = [ "10.244.0.1/24" ];
listenPort = 51820;

70
2configs/wireguard/wiregrill.nix
View file

@ -15,12 +15,12 @@ in mkIf (hasAttr "wiregrill" config.krebs.build.host.nets) {
"net.ipv6.conf.all.forwarding" = 1;
"net.ipv4.conf.all.forwarding" = 1;
};
networking.nat = mkIf isRouter {
enable = true;
enableIPv6 = true;
externalInterface = ext-if;
internalInterfaces = [ "wiregrill" ];
};
#networking.nat = mkIf isRouter {
# enable = true;
# enableIPv6 = true;
# externalInterface = ext-if;
# internalInterfaces = [ "wiregrill" ];
#};
networking.firewall = {
allowedUDPPorts = [ self.wireguard.port ];
@ -40,30 +40,48 @@ in mkIf (hasAttr "wiregrill" config.krebs.build.host.nets) {
servers = [ "1.1.1.1" ];
};
networking.wireguard.interfaces.wiregrill = {
postSetup = optionalString isRouter ''
${pkgs.iptables}/bin/iptables -t nat -A PREROUTING -s 10.244.245.0/24 -j ACCEPT
${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.244.245.0/24 ! -d 10.244.245.0/24 -j MASQUERADE
${pkgs.iptables}/bin/iptables -A FORWARD -i wiregrill -o retiolum -j ACCEPT
${pkgs.iptables}/bin/iptables -A FORWARD -i retiolum -o wiregrill -j ACCEPT
networking.wireguard.interfaces.wiregrill = let
ipt = "${pkgs.iptables}/bin/iptables";
ip6 = "${pkgs.iptables}/bin/ip6tables";
in {
postSetup = ''
${ipt} -A FORWARD -i wiregrill -o retiolum -j ACCEPT
${ipt} -A FORWARD -i wiregrill -o wiregrill -j ACCEPT
${ipt} -A FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
${ip6} -A FORWARD -i wiregrill -o retiolum -j ACCEPT
${ip6} -A FORWARD -i retiolum -o wiregrill -j ACCEPT
${ip6} -A FORWARD -i wiregrill -o wiregrill -j ACCEPT
${ip6} -A FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
${pkgs.iptables}/bin/ip6tables -t nat -A PREROUTING -s 42:1::/32 -j ACCEPT
${pkgs.iptables}/bin/ip6tables -t nat -A POSTROUTING -s 42:1::/32 ! -d 42:1::/48 -j MASQUERADE
${pkgs.iptables}/bin/ip6tables -A FORWARD -i wiregrill -o retiolum -j ACCEPT
${pkgs.iptables}/bin/ip6tables -A FORWARD -i retiolum -o wiregrill -j ACCEPT
'';
'' + (optionalString isRouter ''
#${ipt} -t nat -A PREROUTING -s 10.244.245.0/24 -j ACCEPT
#${ipt} -t nat -A POSTROUTING -s 10.244.245.0/24 ! -d 10.244.245.0/24 -j MASQUERADE
#${ip6} -t nat -A PREROUTING -s 42:1::/32 -j ACCEPT
#${ip6} -t nat -A POSTROUTING -s 42:1::/32 ! -d 42:1::/48 -j MASQUERADE
'');
# This undoes the above command
postShutdown = optionalString isRouter ''
${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.244.245.0/24 -o ${ext-if} -j MASQUERADE
${pkgs.iptables}/bin/iptables -D FORWARD -i wiregrill -o retiolum -j ACCEPT
${pkgs.iptables}/bin/iptables -D FORWARD -i retiolum -o wiregrill -j ACCEPT
postShutdown = ''
${ipt} -D FORWARD -i wiregrill -o retiolum -j ACCEPT
${ipt} -D FORWARD -i retiolum -o wiregrill -j ACCEPT
${ipt} -D FORWARD -i wiregrill -o wiregrill -j ACCEPT
${ipt} -D FORWARD -i wiregrill -o wiregrill -j ACCEPT
${ipt} -D FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
${pkgs.iptables}/bin/ip6tables -t nat -D PREROUTING -s 42:1::/32 -j ACCEPT
${pkgs.iptables}/bin/ip6tables -t nat -D POSTROUTING -s 42:1::/32 ! -d 42:1::/48 -j MASQUERADE
${pkgs.iptables}/bin/ip6tables -D FORWARD -i wiregrill -o retiolum -j ACCEPT
${pkgs.iptables}/bin/ip6tables -D FORWARD -i retiolum -o wiregrill -j ACCEPT
'' ;
${ip6} -D FORWARD -i wiregrill -o retiolum -j ACCEPT
${ip6} -D FORWARD -i retiolum -o wiregrill -j ACCEPT
${ip6} -D FORWARD -i wiregrill -o wiregrill -j ACCEPT
${ip6} -D FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
'' + (optionalString isRouter ''
${ipt} -t nat -D PREROUTING -s 10.244.245.0/24 -j ACCEPT
${ipt} -t nat -D POSTROUTING -s 10.244.245.0/24 -j MASQUERADE
#${ip6} -t nat -D PREROUTING -s 42:1::/32 -j ACCEPT
#${ip6} -t nat -D POSTROUTING -s 42:1::/32 ! -d 42:1::/48 -j MASQUERADE
'' );
ips =
(optional (!isNull self.ip4) self.ip4.addr) ++
(optional (!isNull self.ip6) self.ip6.addr);