nixos/roon-server: fix openFirewall

nixos/modules/services/audio/roon-server.nix

@@ -14,9 +14,6 @@ in {
         default = false;
         description = ''
           Open ports in the firewall for the server.
-
-          UDP: 9003
-          TCP: 9100 - 9200
         '';
       };
       user = mkOption {
@@ -54,10 +51,15 @@ in {
     };
 
     networking.firewall = mkIf cfg.openFirewall {
-      allowedTCPPortRanges = [
-        { from = 9100; to = 9200; }
-      ];
+      allowedTCPPortRanges = [{ from = 9100; to = 9200; }];
       allowedUDPPorts = [ 9003 ];
+      extraCommands = ''
+        iptables -A INPUT -s 224.0.0.0/4 -j ACCEPT
+        iptables -A INPUT -d 224.0.0.0/4 -j ACCEPT
+        iptables -A INPUT -s 240.0.0.0/5 -j ACCEPT
+        iptables -A INPUT -m pkttype --pkt-type multicast -j ACCEPT
+        iptables -A INPUT -m pkttype --pkt-type broadcast -j ACCEPT
+      '';
     };