samueldr's container bridge configuration

configuration.nix

{ config, pkgs, ... }:

{
  # ...
  networking = {
    # or DHCP
    interfaces.eno1 = {
      ip4 = [ { address = "142.x.x.x"; prefixLength = 24; } ];
      #ip6 = [ { address = "'xxxx:xxxx:xxxx:xxxx::1"; prefixLength = 128; } ];
    };
   bridges = {
      br0 = {
        interfaces = [];
      };
    };

    interfaces.br0 = {
      ip4 = [{ address = "10.0.3.1"; prefixLength = 24; }];
      #ip6 = [{ address = hostIp6; prefixLength = 7; }];
    };

    nat = {
      enable = true;
      externalInterface = "eno1";
      internalIPs = ["10.0.3.0/24"];
      internalInterfaces = ["ve-+" "vb-+"];
    };
  };
  # ...
  containers.some_name = {
    privateNetwork = true;
    hostBridge = "br0";
    localAddress = "10.0.3.80/24";
    config =
    { config, lib, pkgs, ... }:
    {
          networking.defaultGateway = "10.0.3.1";
    };
  };
}