machines/losurdo/networking.nix

   1 { pkgs, lib, config, machineName, ... }:
   2 with builtins;
   3 let
   4   inherit (config) networking;
   5   inherit (config.security) gnupg;
   6   lanIPv4        = "192.168.1.215";
   7   lanNet         = "192.168.1.0/24";
   8   lanIPv4Gateway = "192.168.1.1";
   9 in
  10 {
  11 imports = [
  12   networking/nftables.nix
  13   networking/ssh.nix
  14   networking/wireguard/intranet.nix
  15   networking/wireguard/extranet.nix
  16   networking/tor.nix
  17 ];
  18
  19 boot.initrd.network = {
  20   enable = true;
  21   flushBeforeStage2 = true;
  22   # This will automatically load the zfs password prompt on login
  23   # and kill the other prompt so boot can continue
  24   # The pkill zfs kills the zfs load-key from the console
  25   # allowing the boot to continue.
  26   postCommands = ''
  27     echo >>/root/.profile "zfs load-key ${machineName} && pkill zfs"
  28   '';
  29 };
  30
  31 /* WARNING: using ipconfig (the ip= kernel parameter) IS NOT RELIABLE:
  32    a 91.216.110.35/32 becomes a 91.216.110.35/8
  33 boot.kernelParams = map
  34   (ip: "ip=${ip.clientIP}:${ip.serverIP}:${ip.gatewayIP}:${ip.netmask}:${ip.hostname}:${ip.device}:${ip.autoconf}")
  35   [ { clientIP = netIPv4; serverIP = "";
  36       gatewayIP = networking.defaultGateway.address;
  37       netmask = "255.255.255.255";
  38       hostname = ""; device = networking.defaultGateway.interface;
  39       autoconf = "off";
  40     }
  41     { clientIP = lanIPv4; serverIP = "";
  42       gatewayIP = "";
  43       netmask = "255.255.255.0";
  44       hostname = ""; device = "enp2s0";
  45       autoconf = "off";
  46     }
  47   ];
  48 */
  49 /* DIY network config, but a right one */
  50 /*
  51 boot.initrd.preLVMCommands = ''
  52   set -x
  53
  54   # IPv4 lan
  55   ip link set enp5s0 up
  56   ip address add ${lanIPv4}/32 dev enp5s0
  57   ip route add ${lanIPv4Gateway} dev enp5s0
  58   ip route add ${lanNet} dev enp5s0 src ${lanIPv4} proto kernel
  59     # NOTE: ${lanIPv4}/24 would not work with initrd's ip, hence ${lanNet}
  60   ip route add default via ${lanIPv4Gateway} dev enp5s0
  61
  62   # IPv6 net
  63   #ip -6 address add ''${lanIPv6} dev enp5s0
  64   #ip -6 route add ''${lanIPv6Gateway} dev enp5s0
  65   #ip -6 route add default via ''${lanIPv6Gateway} dev enp5s0
  66
  67   ip -4 address
  68   ip -4 route
  69   #ip -6 address
  70   #ip -6 route
  71
  72   set +x
  73
  74   # Since boot.initrd.network's preLVMCommands won't set hasNetwork=1
  75   # we have to run the postCommands ourselves.
  76   ${config.boot.initrd.network.postCommands}
  77 '';
  78 */
  79 # Workaround https://github.com/NixOS/nixpkgs/issues/56822
  80 #boot.initrd.kernelModules = [ "ipv6" ];
  81
  82 # Useless without an out-of-band access, and unsecure
  83 # (though / may still be encrypted at this point).
  84 # boot.kernelParams = [ "boot.shell_on_fail" ];
  85
  86 /*
  87 # Disable IPv6 entirely until it's available
  88 boot.kernel.sysctl = {
  89   "net.ipv6.conf.enp5s0.disable_ipv6" = 1;
  90 };
  91 */
  92
  93 networking = {
  94   hostName = machineName;
  95   domain = "sourcephile.fr";
  96
  97   useDHCP = false;
  98   enableIPv6 = true;
  99   defaultGateway = {
 100     address = lanIPv4Gateway;
 101     interface = "enp5s0";
 102   };
 103   /*
 104   defaultGateway6 = {
 105     address = lanIPv6Gateway;
 106     interface = "enp5s0";
 107   };
 108   */
 109   #nameservers = [ ];
 110 };
 111
 112 networking.nftables.ruleset = ''
 113   add rule inet filter input  iifname "enp5s0" goto net2fw
 114   add rule inet filter output oifname "enp5s0" jump fw2net
 115   add rule inet filter output oifname "enp5s0" log level warn prefix "fw2net: " counter drop
 116   add rule inet filter fw2net ip daddr ${lanNet} log level info prefix "fw2net: lan: " counter accept comment "LAN"
 117   add rule inet nat postrouting oifname "enp5s0" masquerade
 118 '';
 119 boot.kernel.sysctl."net.ipv6.conf.enp5s0.addr_gen_mode" = 1;
 120 /*
 121 security.gnupg.secrets."ipv6/enp5s0/stable_secret" = {};
 122 # This is only active in stage2, the initrd will still use the MAC-based SLAAC IPv6.
 123 system.activationScripts.ipv6 = ''
 124   ${pkgs.procps}/bin/sysctl --quiet net.ipv6.conf.enp5s0.stable_secret="$(cat ${gnupg.secrets."ipv6/enp5s0/stable_secret".path})"
 125 '';
 126 */
 127 networking.interfaces.enp5s0 = {
 128   useDHCP = false;
 129   ipv4.addresses = [ { address = lanIPv4; prefixLength = 24; } ];
 130   ipv4.routes    = [ { address = networking.defaultGateway.address; prefixLength = 32; } ];
 131
 132   /*
 133   ipv6.addresses = [ { address = lanIPv6; prefixLength = 64; }
 134                      { address = "fe80::1"; prefixLength = 10; }
 135                    ];
 136   ipv6.routes    = [ { address = networking.defaultGateway6.address; prefixLength = 64; } ];
 137   */
 138 };
 139 networking.interfaces.wlp4s0 = {
 140   useDHCP = false;
 141 };
 142 }