363 lines
9.6 KiB
Nix
363 lines
9.6 KiB
Nix
{ config, pkgs, inputs, ... }:
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{
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boot = {
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kernel.sysctl = {
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"net.ipv6.conf.all.forwarding" = true;
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"net.ipv6.conf.default.forwarding" = true;
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"net.ipv4.conf.all.forwarding" = true;
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"net.ipv4.conf.default.forwarding" = true;
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};
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};
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# Enable LTE drivers
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hardware.usb-modeswitch.enable = true;
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##################
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# NETWORK CONFIG #
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##################
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# eno1 -> VLAN100 -> Internet
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# eno2 -> LAN
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# eno3 -> Pas utilisé
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# eno4 -> Pas utilisé
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# enp0s21u1 -> Clé 4G Bouygues
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# wg0 -> Tunnel Wireguard ARN
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networking = {
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hostName = "loutreos"; # Define your hostname.
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hostId = "7e66e347";
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useNetworkd = true;
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useDHCP = false;
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nameservers = [
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"1.1.1.1"
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"1.0.0.1"
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];
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vlans = {
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bouygues = {
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id = 100;
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interface = "eno1";
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};
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};
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interfaces = {
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bouygues = {
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# Adresse MAC BBox ? https://lafibre.info/remplacer-bbox/informations-de-connexion-ftth/msg598303/#msg598303
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macAddress = "E8:AD:A6:21:73:68";
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useDHCP = true;
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};
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eno2 = {
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ipv4.addresses = [
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{ address = "10.30.0.1"; prefixLength = 16; }
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];
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};
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enp0s21u1.useDHCP = true;
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};
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nftables = {
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enable = true;
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flushRuleset = false;
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tables = {
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"multi-wan-routing" = {
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family = "inet";
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content = ''
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chain PREROUTING {
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type filter hook prerouting priority mangle; policy accept;
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# Restore the packet's CONNMARK to the MARK for existing incoming connections
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counter meta mark set ct mark
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# If packet MARK is set, then it means that there is already a connection mark
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meta mark != 0x00000000 counter accept
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# Else, we need to mark the packet.
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# If the packet is incoming on bouygues then set MARK to 1, LTE MARK 2 and VPN MARK 3
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iifname "bouygues" counter meta mark set 0x1
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iifname "enp0s21u1" counter meta mark set 0x2
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iifname "wg0" counter meta mark set 0x3
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# Save new mark in CONNMARK
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counter ct mark set mark
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}
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chain OUTPUT {
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type route hook output priority mangle; policy accept;
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# Restore CONNMARK to MARK for outgoing packets before final routing decision
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counter meta mark set ct mark
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}
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chain POSTROUTING {
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type filter hook postrouting priority mangle; policy accept;
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# Save MARK to CONNMARK
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counter ct mark set mark
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}
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'';
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};
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"redirect-external-to-local" = {
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family = "ip";
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content = ''
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chain PREROUTING {
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type nat hook prerouting priority dstnat; policy accept;
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# Redirect local network request from server external IP to internal IP
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# This allow access to server without internet access
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ip saddr 10.30.0.0/16 ip daddr 176.180.172.105 counter dnat to 10.30.0.1
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}
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'';
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};
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};
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};
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firewall = {
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enable = true;
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allowedTCPPorts = [ 80 443 ];
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allowedUDPPorts = [ ];
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# Open ports on local netwok only
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interfaces.eno2 = {
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allowedTCPPorts = [
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111 2049 4000 4001 4002 # NFS
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3483 9000 9090 # Slimserver
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1935 # RTMP
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];
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allowedUDPPorts = [
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111 2049 4000 4001 4002 # NFS
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3483 # Slimserver
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67 # DHCP
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];
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};
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# Don't forward incoming IPv6 requests to local network
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filterForward = true;
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extraForwardRules = ''
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# Forward all IPv6 traffic from local network
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iifname "eno2" counter accept
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'';
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};
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};
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systemd.services.systemd-networkd = {
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unitConfig = {
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RequiresMountsFor = "/mnt/secrets/wireguard";
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};
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serviceConfig = {
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LoadCredential = [
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"network.wireguard.private.wg0:/mnt/secrets/wireguard/wireguard.private"
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"network.wireguard.preshared.wg0:/mnt/secrets/wireguard/wireguard.preshared"
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];
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};
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};
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#################
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# ROUTING RULES #
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#################
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# 0: from all lookup local
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# 60: from all iif lo dport 25 lookup vpn # mails are forced to vpn table
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# 32766: from all lookup main # main table should contain no default routes, only local network routes
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# 32767: from all lookup default
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# 41000: from all fwmark 0x1 lookup fiber # fwmark indicate established connection that must go through same interface
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# 42000: from all fwmark 0x2 lookup lte
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# 43000: from all fwmark 0x3 lookup vpn
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# 51000: from all lookup fiber # first table encountered with a default route if fiber is up
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# 52000: from all lookup lte # first table encountered with a default route if fiber is down
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systemd.network = let
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routeTables = {
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fiber = 1;
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lte = 2;
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vpn = 3;
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};
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in {
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enable = true;
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config = {
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inherit routeTables;
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addRouteTablesToIPRoute2 = true;
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};
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# Wireguard ARN device configuation
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netdevs = {
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"10-wg0" = {
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netdevConfig = {
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Kind = "wireguard";
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Name = "wg0";
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MTUBytes = "1450";
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};
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wireguardConfig = {
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PrivateKey = "@network.wireguard.private.wg0";
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RouteTable = routeTables.vpn;
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};
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wireguardPeers = [
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{
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Endpoint = "89.234.141.83:8095";
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PublicKey = "t3+JkBfXI1uw8fa9P6JfxXJfTPm9cOHcgIN215UHg2g=";
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PresharedKey = "@network.wireguard.preshared.wg0";
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AllowedIPs = ["0.0.0.0/0" "::/0"];
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PersistentKeepalive = 15;
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}
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];
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};
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};
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networks = {
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#########
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# FIBER #
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#########
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# Set route metric to highest priority
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# Set DHCP client magic settings for Bouygues
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"40-bouygues" = {
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dhcpV4Config.RouteTable = routeTables.fiber;
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dhcpV6Config = {
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DUIDRawData = "00:03:00:01:E8:AD:A6:21:73:68";
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WithoutRA = "solicit";
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};
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ipv6AcceptRAConfig = {
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DHCPv6Client = true;
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RouteTable = routeTables.fiber;
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};
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networkConfig = {
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KeepConfiguration = "dhcp-on-stop";
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IPv6AcceptRA = true;
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DHCPPrefixDelegation = true;
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};
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# Static attribution of first IPv6 subnet
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dhcpPrefixDelegationConfig.SubnetId = "0";
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# Route everything to fiber link with a priority of 40000
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routingPolicyRules = [
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{
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FirewallMark = 1;
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Table = routeTables.fiber;
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Priority = 41000;
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Family = "both";
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}
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{
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Table = routeTables.fiber;
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Priority = 51000;
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Family = "both";
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}
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];
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};
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# Don't check VLAN physical interface as it is not directly used
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"40-eno1".linkConfig.RequiredForOnline = "no";
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#######
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# LTE #
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#######
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# Set LTE route to lower priority
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"40-enp0s21u1" = {
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dhcpV4Config.RouteTable = routeTables.lte;
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# Route all to lte link with a priority of 50000
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routingPolicyRules = [
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{
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FirewallMark = 2;
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Table = routeTables.lte;
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Priority = 42000;
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Family = "both";
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}
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{
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Table = routeTables.lte;
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Priority = 52000;
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Family = "both";
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}
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];
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};
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#######
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# VPN #
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#######
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# Wireguard ARN network configuation
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"10-wg0" = {
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matchConfig.Name = "wg0";
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address = [
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"89.234.141.196/32"
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"2a00:5881:8119:400::1/128"
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];
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routingPolicyRules = [
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# Route outgoing emails to VPN table
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{
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IncomingInterface = "lo";
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DestinationPort = "25";
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Table = routeTables.vpn;
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Priority = 60;
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Family = "both";
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}
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# Route packets originating from wg0 device to VPN table
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# Allow server to respond on the wg0 interface requests
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{
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FirewallMark = 3;
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Table = routeTables.vpn;
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Priority = 43000;
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Family = "both";
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}
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];
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};
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#######
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# LAN #
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#######
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# LAN DHCP server config
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"40-eno2" = {
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networkConfig = {
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IPv6SendRA = true;
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DHCPPrefixDelegation = true;
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DHCPServer = true;
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IPMasquerade = "ipv4";
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};
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dhcpServerConfig = {
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EmitRouter = true;
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EmitDNS = true;
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DNS = [
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"1.1.1.1"
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"1.0.0.1"
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];
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};
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dhcpServerStaticLeases = [
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# IPMI
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{
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Address = "10.30.1.1";
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MACAddress = "ac:1f:6b:4b:01:15";
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}
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# paul-fixe
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{
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Address = "10.30.50.1";
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MACAddress = "b4:2e:99:ed:24:26";
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}
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# salonled
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{
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Address = "10.30.40.1";
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MACAddress = "e0:98:06:85:e9:ce";
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}
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# miroir-bleu
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{
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Address = "10.30.40.2";
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MACAddress = "e0:98:06:86:38:fc";
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}
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# miroir-orange
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{
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Address = "10.30.40.3";
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MACAddress = "50:02:91:78:be:be";
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}
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];
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ipv6SendRAConfig = {
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EmitDNS = true;
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DNS = [
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"2606:4700:4700::1111"
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"2606:4700:4700::1001"
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];
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};
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};
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};
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};
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}
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