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 boot.initrd.preLVMCommands = ''
  51   set -x
  52
  53   # IPv4 lan
  54   ip link set enp5s0 up
  55   ip address add ${lanIPv4}/32 dev enp5s0
  56   ip route add ${lanIPv4Gateway} dev enp5s0
  57   ip route add ${lanNet} dev enp5s0 src ${lanIPv4} proto kernel
  58     # NOTE: ${lanIPv4}/24 would not work with initrd's ip, hence ${lanNet}
  59   ip route add default via ${lanIPv4Gateway} dev enp5s0
  60
  61   # IPv6 net
  62   #ip -6 address add ''${lanIPv6} dev enp5s0
  63   #ip -6 route add ''${lanIPv6Gateway} dev enp5s0
  64   #ip -6 route add default via ''${lanIPv6Gateway} dev enp5s0
  65
  66   ip -4 address
  67   ip -4 route
  68   #ip -6 address
  69   #ip -6 route
  70
  71   set +x
  72 '';
  73 # Workaround https://github.com/NixOS/nixpkgs/issues/56822
  74 #boot.initrd.kernelModules = [ "ipv6" ];
  75
  76 # Useless without an out-of-band access, and unsecure
  77 # (though / may still be encrypted at this point).
  78 # boot.kernelParams = [ "boot.shell_on_fail" ];
  79
  80 /*
  81 # Disable IPv6 entirely until it's available
  82 boot.kernel.sysctl = {
  83   "net.ipv6.conf.enp5s0.disable_ipv6" = 1;
  84 };
  85 */
  86
  87 networking = {
  88   hostName = machineName;
  89   domain = "sourcephile.fr";
  90
  91   useDHCP = false;
  92   enableIPv6 = true;
  93   defaultGateway = {
  94     address = lanIPv4Gateway;
  95     interface = "enp5s0";
  96   };
  97   /*
  98   defaultGateway6 = {
  99     address = lanIPv6Gateway;
 100     interface = "enp5s0";
 101   };
 102   */
 103   #nameservers = [ ];
 104 };
 105
 106 networking.nftables.ruleset = ''
 107   add rule inet filter input  iifname "enp5s0" goto net2fw
 108   add rule inet filter output oifname "enp5s0" jump fw2net
 109   add rule inet filter output oifname "enp5s0" log level warn prefix "fw2net: " counter drop
 110   add rule inet filter fw2net ip daddr ${lanNet} log level info prefix "fw2net: lan: " counter accept comment "LAN"
 111   add rule inet nat postrouting oifname "enp5s0" masquerade
 112 '';
 113 boot.kernel.sysctl."net.ipv6.conf.enp5s0.addr_gen_mode" = 1;
 114 /*
 115 security.gnupg.secrets."ipv6/enp5s0/stable_secret" = {};
 116 # This is only active in stage2, the initrd will still use the MAC-based SLAAC IPv6.
 117 system.activationScripts.ipv6 = ''
 118   ${pkgs.procps}/bin/sysctl --quiet net.ipv6.conf.enp5s0.stable_secret="$(cat ${gnupg.secrets."ipv6/enp5s0/stable_secret".path})"
 119 '';
 120 */
 121 networking.interfaces.enp5s0 = {
 122   useDHCP = false;
 123   ipv4.addresses = [ { address = lanIPv4; prefixLength = 24; } ];
 124
 125   /*
 126   ipv4.routes    = [ { address = networking.defaultGateway.address; prefixLength = 32; } ];
 127   ipv6.addresses = [ { address = lanIPv6; prefixLength = 64; }
 128                      { address = "fe80::1"; prefixLength = 10; }
 129                    ];
 130   ipv6.routes    = [ { address = networking.defaultGateway6.address; prefixLength = 64; } ];
 131   */
 132 };
 133 networking.interfaces.wlp4s0 = {
 134   useDHCP = false;
 135 };
 136 }