hosts/losurdo/networking.nix

   1 { pkgs, lib, config, hostName, ... }:
   2 with builtins;
   3 let
   4   inherit (config) networking;
   5   netIface       = "enp5s0";
   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/tor.nix
  14   networking/nsupdate.nix
  15   networking/wireless.nix
  16   networking/openvpn.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 ${hostName} && pkill zfs"
  28   '';
  29   # Retry DHCP forever (because in case of power failure,
  30   # the router may take longer to boot).
  31   # Beware that this is not interruptible with Ctrl-C
  32   udhcpc.extraArgs = [ "--retries=0" ];
  33 };
  34
  35 /* WARNING: using ipconfig (the ip= kernel parameter) IS NOT RELIABLE:
  36    a 91.216.110.35/32 becomes a 91.216.110.35/8
  37 boot.kernelParams = map
  38   (ip: "ip=${ip.clientIP}:${ip.serverIP}:${ip.gatewayIP}:${ip.netmask}:${ip.hostname}:${ip.device}:${ip.autoconf}")
  39   [ { clientIP = netIPv4; serverIP = "";
  40       gatewayIP = networking.defaultGateway.address;
  41       netmask = "255.255.255.255";
  42       hostname = ""; device = networking.defaultGateway.interface;
  43       autoconf = "off";
  44     }
  45     { clientIP = lanIPv4; serverIP = "";
  46       gatewayIP = "";
  47       netmask = "255.255.255.0";
  48       hostname = ""; device = "enp2s0";
  49       autoconf = "off";
  50     }
  51   ];
  52 */
  53 /* DIY network config, but a right one */
  54 /*
  55 boot.initrd.preLVMCommands = ''
  56   set -x
  57
  58   # IPv4 lan
  59   ip link set ${netIface} up
  60   ip address add ${lanIPv4}/32 dev ${netIface}
  61   ip route add ${lanIPv4Gateway} dev ${netIface}
  62   ip route add ${lanNet} dev ${netIface} src ${lanIPv4} proto kernel
  63     # NOTE: ${lanIPv4}/24 would not work with initrd's ip, hence ${lanNet}
  64   ip route add default via ${lanIPv4Gateway} dev ${netIface}
  65
  66   # IPv6 net
  67   #ip -6 address add ''${lanIPv6} dev ${netIface}
  68   #ip -6 route add ''${lanIPv6Gateway} dev ${netIface}
  69   #ip -6 route add default via ''${lanIPv6Gateway} dev ${netIface}
  70
  71   ip -4 address
  72   ip -4 route
  73   #ip -6 address
  74   #ip -6 route
  75
  76   set +x
  77 '';
  78 */
  79 # Workaround https://github.com/NixOS/nixpkgs/issues/56822
  80 #boot.initrd.kernelModules = [ "ipv6" ];
  81
  82 # Useless without an out-of-band access, and unsecure
  83 # (though / may still be encrypted at this point).
  84 # boot.kernelParams = [ "boot.shell_on_fail" ];
  85
  86 /*
  87 # Disable IPv6 entirely until it's available
  88 boot.kernel.sysctl = {
  89   "net.ipv6.conf.${netIface}.disable_ipv6" = 1;
  90 };
  91 */
  92
  93 networking = {
  94   hostName = hostName;
  95   domain = "sourcephile.fr";
  96
  97   useDHCP = false;
  98   enableIPv6 = true;
  99   /*
 100   defaultGateway = {
 101     address = lanIPv4Gateway;
 102     interface = "${netIface}";
 103   };
 104   defaultGateway6 = {
 105     address = lanIPv6Gateway;
 106     interface = "${netIface}";
 107   };
 108   */
 109   #nameservers = [ ];
 110 };
 111
 112 networking.nftables.ruleset = ''
 113   table inet filter {
 114     chain input {
 115       iifname ${netIface} goto input-net
 116     }
 117     chain output {
 118       oifname ${netIface} jump output-net
 119       oifname ${netIface} log level warn prefix "output-net: " counter drop
 120     }
 121     chain output-net {
 122       ip daddr ${lanNet} log level info prefix "output-net: lan: " counter accept comment "LAN"
 123     }
 124   }
 125   table inet nat {
 126     chain postrouting {
 127       oifname ${netIface} masquerade
 128     }
 129   }
 130 '';
 131 boot.kernel.sysctl."net.ipv6.conf.${netIface}.addr_gen_mode" = 1;
 132 /*
 133 security.gnupg.secrets."ipv6/${netIface}/stable_secret" = {};
 134 # This is only active in stage2, the initrd will still use the MAC-based SLAAC IPv6.
 135 system.activationScripts.ipv6 = ''
 136   ${pkgs.procps}/bin/sysctl --quiet net.ipv6.conf.${netIface}.stable_secret="$(cat ${gnupg.secrets."ipv6/${netIface}/stable_secret".path})"
 137 '';
 138 */
 139 networking.interfaces.${netIface} = {
 140   useDHCP = true;
 141   /*
 142   ipv4.addresses = [ { address = lanIPv4; prefixLength = 24; } ];
 143
 144   ipv4.routes    = [ { address = networking.defaultGateway.address; prefixLength = 32; } ];
 145   ipv6.addresses = [ { address = lanIPv6; prefixLength = 64; }
 146                      { address = "fe80::1"; prefixLength = 10; }
 147                    ];
 148   ipv6.routes    = [ { address = networking.defaultGateway6.address; prefixLength = 64; } ];
 149   */
 150 };
 151 environment.systemPackages = [
 152   pkgs.iodine
 153 ];
 154 }