diff --git a/common/network/TcpSocket.cxx b/common/network/TcpSocket.cxx
index 87bf363..faa80f1 100644
--- a/common/network/TcpSocket.cxx
+++ b/common/network/TcpSocket.cxx
@@ -699,7 +699,10 @@ WebsocketListener::WebsocketListener(const struct sockaddr *listenaddr,
   pthread_create(&tid, NULL, start_server, NULL);
 
   uint16_t *nport = (uint16_t *) calloc(1, sizeof(uint16_t));
-  *nport = ntohs(sa.u.sin.sin_port);
+  if (rfb::Server::udpPort)
+    *nport = rfb::Server::udpPort;
+  else
+    *nport = ntohs(sa.u.sin.sin_port);
   pthread_create(&tid, NULL, udpserver, nport);
 }
 
diff --git a/common/network/Udp.cxx b/common/network/Udp.cxx
index ffcc825..dedaa0b 100644
--- a/common/network/Udp.cxx
+++ b/common/network/Udp.cxx
@@ -60,6 +60,7 @@ void *udpserver(void *nport) {
 		vlog.error("Failed to create WebUDP host");
 		return NULL;
 	}
+	vlog.debug("UDP listening on port %u", *(uint16_t *) nport);
 
 	__sync_bool_compare_and_swap(&host, host, myhost);
 
diff --git a/common/rfb/ServerCore.cxx b/common/rfb/ServerCore.cxx
index 5f01dae..38648e0 100644
--- a/common/rfb/ServerCore.cxx
+++ b/common/rfb/ServerCore.cxx
@@ -226,6 +226,10 @@ rfb::IntParameter rfb::Server::udpFullFrameFrequency
 ("udpFullFrameFrequency",
  "Send a full frame every N frames for clients using UDP. 0 to disable",
  0, 0, 1000);
+rfb::IntParameter rfb::Server::udpPort
+("udpPort",
+ "Which port to use for UDP. Default same as websocket",
+ 0, 0, 65535);
 
 static void bandwidthPreset() {
   rfb::Server::dynamicQualityMin.setParam(2);
@@ -236,4 +240,4 @@ static void bandwidthPreset() {
 rfb::PresetParameter rfb::Server::preferBandwidth
 ("PreferBandwidth",
  "Set various options for lower bandwidth use. The default is off, aka to prefer quality.",
- false, bandwidthPreset);
\ No newline at end of file
+ false, bandwidthPreset);
diff --git a/common/rfb/ServerCore.h b/common/rfb/ServerCore.h
index 9ddfba6..aef0153 100644
--- a/common/rfb/ServerCore.h
+++ b/common/rfb/ServerCore.h
@@ -61,6 +61,7 @@ namespace rfb {
     static IntParameter videoArea;
     static IntParameter videoScaling;
     static IntParameter udpFullFrameFrequency;
+    static IntParameter udpPort;
     static StringParameter kasmPasswordFile;
     static StringParameter publicIP;
     static BoolParameter printVideoArea;
diff --git a/unix/xserver/hw/vnc/Xvnc.man b/unix/xserver/hw/vnc/Xvnc.man
index d0ea160..ff29bfb 100644
--- a/unix/xserver/hw/vnc/Xvnc.man
+++ b/unix/xserver/hw/vnc/Xvnc.man
@@ -131,6 +131,10 @@ Default unset.
 Send a full frame every N frames for clients using UDP. 0 to disable. Default \fI0\fP.
 .
 .TP
+.B \-udpPort \fIport\fP
+Which port to use for UDP. Default same as websocket.
+.
+.TP
 .B \-AcceptCutText
 Accept clipboard updates from clients. Default is on.
 .