add socks proxy in ks

os/3proxy.nix

@@ -0,0 +1,26 @@
+{
+  services._3proxy = {
+    enable = true;
+    services = [
+      {
+        type = "socks";
+          auth = [ "strong" ];
+          acl = [ {
+            rule = "allow";
+            users = [ "user1" ];
+          }
+        ];
+      }
+    ];
+    usersFile = "/etc/3proxy.passwd";
+  };
+
+  environment.etc = {
+    "3proxy.passwd".text = ''
+      user1:CR:$1$TqAb0wvc$e.O2GhdhXaMYSxNdNBmzh/
+    '';
+  };
+
+  networking.firewall.allowedTCPPorts = [ 1080 ];
+  networking.firewall.allowedUDPPorts = [ 1080 ];
+}

os/ks/configuration.nix

@@ -8,6 +8,7 @@ in {
   imports = [
     ./hardware-configuration.nix
     ../common.nix
+    ../3proxy.nix
     inputs.simple-nixos-mailserver.nixosModule
   ];