servers/mermet/networking.nix

   1 { pkgs, lib, config, ipv4, servers, ... }:
   2 with builtins;
   3 let
   4   inherit (builtins.extraBuiltins) pass-to-file;
   5   inherit (config) networking users;
   6   netIPv4        = ipv4;
   7   netIPv4Gateway = "80.67.180.134";
   8   #netIPv6        = "2001:912:400:104::35";
   9   #netIPv6Gateway = "2001:912:400:104::1";
  10   lanIPv4        = "192.168.1.214";
  11   lanNet         = "192.168.1.0/24";
  12   lanIPv4Gateway = "192.168.1.1";
  13 in
  14 {
  15 imports = [
  16   networking/nftables.nix
  17 ];
  18 boot.initrd.network = {
  19   enable = true;
  20   ssh = {
  21     enable = true;
  22     # To prevent ssh from freaking out because a different host key is used,
  23     # a different port for dropbear is useful
  24     # (assuming the same host has also a normal sshd running)
  25     port = 2222;
  26     authorizedKeys = users.users.root.openssh.authorizedKeys.keys;
  27   };
  28   # This will automatically load the zfs password prompt on login
  29   # and kill the other prompt so boot can continue
  30   # The pkill zfs kills the zfs load-key from the console
  31   # allowing the boot to continue.
  32   postCommands = ''
  33     echo >>/root/.profile "zfs load-key -a && pkill zfs"
  34   '';
  35 };
  36
  37 /* WARNING: using ipconfig (the ip= kernel parameter) IS NOT RELIABLE:
  38    a 91.216.110.35/32 becomes a 91.216.110.35/8
  39 boot.kernelParams = map
  40   (ip: "ip=${ip.clientIP}:${ip.serverIP}:${ip.gatewayIP}:${ip.netmask}:${ip.hostname}:${ip.device}:${ip.autoconf}")
  41   [ { clientIP = netIPv4; serverIP = "";
  42       gatewayIP = networking.defaultGateway.address;
  43       netmask = "255.255.255.255";
  44       hostname = ""; device = networking.defaultGateway.interface;
  45       autoconf = "off";
  46     }
  47     { clientIP = lanIPv4; serverIP = "";
  48       gatewayIP = "";
  49       netmask = "255.255.255.0";
  50       hostname = ""; device = "enp2s0";
  51       autoconf = "off";
  52     }
  53   ];
  54 */
  55 /* DIY network config, but a right one */
  56 boot.initrd.preLVMCommands = ''
  57   set -x
  58
  59   # IPv4 net
  60   ip link set enp1s0 up
  61   ip address add ${netIPv4}/32 dev enp1s0
  62   ip route add ${netIPv4Gateway} dev enp1s0
  63   ip route add default via ${netIPv4Gateway} dev enp1s0
  64
  65   # IPv4 lan
  66   ip link set enp2s0 up
  67   ip address add ${lanIPv4}/32 dev enp2s0
  68   ip route add ${lanIPv4Gateway} dev enp2s0
  69   ip route add ${lanNet} dev enp2s0 src ${lanIPv4} proto kernel
  70     # NOTE: ${lanIPv4}/24 would not work with initrd's ip, hence ${lanNet}
  71
  72   # IPv6 net
  73   #ip -6 address add ''${netIPv6} dev enp1s0
  74   #ip -6 route add ''${netIPv6Gateway} dev enp1s0
  75   #ip -6 route add default via ''${netIPv6Gateway} dev enp1s0
  76
  77   ip -4 address
  78   ip -4 route
  79   #ip -6 address
  80   #ip -6 route
  81
  82   set +x
  83
  84   # Since boot.initrd.network's preLVMCommands won't set hasNetwork=1
  85   # we have to run the postCommands ourselves.
  86   ${config.boot.initrd.network.postCommands}
  87 '';
  88
  89 # Workaround https://github.com/NixOS/nixpkgs/issues/56822
  90 #boot.initrd.kernelModules = [ "ipv6" ];
  91
  92 # Useless without an out-of-band access, and unsecure
  93 # (though / may still be encrypted at this point).
  94 # boot.kernelParams = [ "boot.shell_on_fail" ];
  95
  96 # Disable IPv6 entirely until it's available
  97 boot.kernel.sysctl = {
  98   "net.ipv6.conf.enp1s0.disable_ipv6" = 1;
  99 };
 100
 101 services.knot.extraConfig = lib.mkBefore ''
 102   server:
 103     listen: ${netIPv4}@53
 104     #listen: ::@53
 105 '';
 106
 107 networking = rec {
 108   hostName   = "mermet";
 109   domainBase = "sourcephile";
 110   domain     = "${domainBase}.fr";
 111
 112   useDHCP = false;
 113   defaultGateway = {
 114     address = netIPv4Gateway;
 115     interface = "enp1s0";
 116   };
 117   /*
 118   defaultGateway6 = {
 119     address = netIPv6Gateway;
 120     interface = "enp1s0";
 121   };
 122   */
 123   #nameservers = [ ];
 124   nftables.ruleset = ''
 125     add rule inet filter input  iifname "enp1s0" goto net2fw
 126     add rule inet filter output oifname "enp1s0" goto fw2net
 127     add rule inet filter fw2net ip daddr ${servers.losurdo.ipv4} counter accept comment "losurdo"
 128
 129     add rule inet filter input  iifname "enp2s0" goto lan2fw
 130     add rule inet filter output oifname "enp2s0" goto fw2lan
 131   '';
 132   interfaces.enp1s0 = {
 133     useDHCP = false;
 134     ipv4.addresses = [ { address = netIPv4; prefixLength = 32; } ];
 135     ipv4.routes    = [ { address = networking.defaultGateway.address; prefixLength = 32; } ];
 136
 137     /*
 138     ipv6.addresses = [ { address = netIPv6; prefixLength = 64; }
 139                        { address = "fe80::1"; prefixLength = 10; }
 140                      ];
 141     ipv6.routes    = [ { address = networking.defaultGateway6.address; prefixLength = 64; } ];
 142     */
 143   };
 144   interfaces.enp2s0 = {
 145     useDHCP = false;
 146     ipv4.addresses = [ { address = lanIPv4; prefixLength = 24; } ];
 147     /*
 148     # FIXME: remove this /1 hack when the machine will be racked at PTT
 149     ipv4.routes    = [ { address = "0.0.0.0";   prefixLength = 1; via = "192.168.1.1"; }
 150                        { address = "128.0.0.0"; prefixLength = 1; via = "192.168.1.1"; }
 151                        ];
 152     */
 153     /*
 154     ipv6.addresses = [ { address = "fe80::1"; prefixLength = 10; } ];
 155     ipv6.routes    = [ ];
 156     */
 157   };
 158   interfaces.enp3s0 = {
 159     useDHCP = false;
 160   };
 161 };
 162 }