modularized all the things

part one (?)

modules/networking/README.md

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+# Network and networking modules
+
+This directory houses all network, firewall, DHCP, DNS, and all other related networking enablement.
+
+## `core.nix`
+
+This is where the firewall and NetworkManager live. For the firewall, you have pre-defined options that will open ports for you by enabling some network service.
+
+For example:
+
+```nix
+tcpPorts.web.enable = true;
+udpPorts.dns.enable = true;
+```
+
+Here's a more featureful example of how you would enable a firewall and set up NetworkManager:
+
+```nix
+  customNetworking = {
+    firewall = {
+      enable = true;
+
+      # Open web service ports
+      tcpPorts.web.enable = true;
+
+      # Custom TCP ports
+      tcpPorts.allowedPorts = [ 8080 22 ];
+
+      # Custom UDP ports
+      udpPorts.allowedPorts = [ 5000 ];
+    };
+
+    networkManager = {
+      enable = true;
+      extraPlugins = with pkgs; [
+        # Additional NetworkManager plugins
+        networkmanager-openvpn
+        networkmanager-openconnect
+      ];
+    };
+  };
+```
+
+As shown above, you'll have to open ports for services you would want to access remotely.
+
+## DNS
+
+There are two options here: BIND9 (or simply Bind) or Technitium DNS server. Enabling both DNS servers will throw an error and your configuration will not build.
+
+You'll have to import `./dns.nix` for the services to be enabled.
+
+Here's an example of what configuration might look like:
+
+```nix
+  dns.bind = {
+    enable = true;
+    settings = {
+      interfaces = [ "127.0.0.1" "192.168.100.100" ];
+      zones = [
+        {
+          name = "example.com";
+          type = "master";
+          file = "/etc/named/zones/example.com.zone";
+        }
+      ];
+      extraConfig = ''
+        // Additional BIND configuration
+        options {
+          directory "/var/named";
+          recursion yes;
+        }
+      '';
+    }
+  };
+```
+
+_or_
+
+```nix
+  dns.technitium = {
+    enable = true;
+    settings = {
+      address = "192.168.100.0";
+      port = 5380;
+      extraOptions = {
+        LOG_LEVEL = "info";
+      };
+    }
+  };
+```