Skip Port 53, 443 before using single XUDP for VLESS & VMess

proxy/vmess/outbound/outbound.go

@@ -131,7 +131,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	ctx, cancel := context.WithCancel(ctx)
 	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
 
-	if request.Command == protocol.RequestCommandUDP && h.cone {
+	if request.Command == protocol.RequestCommandUDP && h.cone && request.Port != 53 && request.Port != 443 {
 		request.Command = protocol.RequestCommandMux
 		request.Address = net.DomainAddress("v1.mux.cool")
 		request.Port = net.Port(666)