diff --git a/nixos/viridian/services/mpd.nix b/nixos/viridian/services/mpd.nix
index 55ebd23..6260520 100644
--- a/nixos/viridian/services/mpd.nix
+++ b/nixos/viridian/services/mpd.nix
@@ -26,4 +26,9 @@
       /srv/multimedia/library/music 192.168.1.101(rw,nohide,insecure,no_subtree_check)
     '';
   };
+  networking.firewall = {
+    # # for NFSv3; view with `rpcinfo -p`
+    allowedTCPPorts = [ 111 2049 4000 4001 4002 20048 ];
+    allowedUDPPorts = [ 111 2049 4000 4001 4002 20048 ];
+  };
 }