diff --git a/prototypes/quic_demo/src/bin/client_gui.rs b/prototypes/quic_demo/src/bin/client_gui.rs
index cd65b5e..1273420 100644
--- a/prototypes/quic_demo/src/bin/client_gui.rs
+++ b/prototypes/quic_demo/src/bin/client_gui.rs
@@ -27,8 +27,8 @@ struct Opt {
 
 #[derive (Clone, Copy)]
 enum Message {
-	OpenPort,
-	ClosePort,
+	OpenPort (usize),
+	ClosePort (usize),
 }
 
 fn main () -> anyhow::Result <()> {
@@ -49,33 +49,51 @@ fn main () -> anyhow::Result <()> {
 	let mut x = margin;
 	let mut y = margin;
 	
-	let mut frame_status;
-	
-	{
-		frame_status = Frame::new (10, 10, 800 - 20, 30, "Forwarding 0 ports");
-	}
+	let mut frame_status = Frame::new (x, y, 800 - 20, h, "Forwarding 0 ports");
 	
 	y += h + margin;
 	x = margin;
 	
 	{
 		let w = 80;
-		let frame_client_port = Frame::new (x, y, w, h, "Local port");
+		Frame::new (x, y, w, h, "Local port");
 		x += w + margin;
 		
 		let w = 120;
-		let frame_server_id = Frame::new (x, y, w, h, "Server ID");
+		Frame::new (x, y, w, h, "Server ID");
 		x += w + margin;
 		
 		let w = 80;
-		let frame_server_port = Frame::new (x, y, 80, h, "Server port");
+		Frame::new (x, y, w, h, "Server port");
 		// x += w + margin;
 	}
 	
 	y += h + margin;
 	x = margin;
 	
-	let mut gui_port = GuiPort::new (fltk_tx, &mut x, y);
+	let gui_port_0 = GuiPort::new (fltk_tx, &mut x, y, 0);
+	y += h + margin;
+	x = margin;
+	
+	let gui_port_1 = GuiPort::new (fltk_tx, &mut x, y, 1);
+	y += h + margin;
+	x = margin;
+	
+	let gui_port_2 = GuiPort::new (fltk_tx, &mut x, y, 2);
+	// y += h + margin;
+	// x = margin;
+	
+	let mut gui_ports = vec! [
+		gui_port_0,
+		gui_port_1,
+		gui_port_2,
+	];
+	
+	let mut forwarding_instances = vec! [
+		None,
+		None,
+		None,
+	];
 	
 	// y += h + margin;
 	
@@ -99,12 +117,10 @@ fn main () -> anyhow::Result <()> {
 		Ok::<_, anyhow::Error> (connection)
 	})?;
 	
-	let mut forwarding_instance = None;
-	
 	while app.wait () {
 		match fltk_rx.recv () {
-			Some (Message::OpenPort) => {
-				if let Ok (params) = gui_port.get_params () {
+			Some (Message::OpenPort (port_idx)) => {
+				if let Ok (params) = gui_ports [port_idx].get_params () {
 					let connection_p2_p3 = connection_p2_p3.clone ();
 					let (shutdown_flag, shutdown_flag_rx) = tokio::sync::watch::channel (true);
 					
@@ -114,18 +130,18 @@ fn main () -> anyhow::Result <()> {
 						shutdown_flag_rx
 					));
 					
-					forwarding_instance.replace (ForwardingInstance {
+					forwarding_instances [port_idx].replace (ForwardingInstance {
 						task,
 						shutdown_flag,
 					});
 					
-					gui_port.set_forwarding (true);
+					gui_ports [port_idx].set_forwarding (true);
 					
 					frame_status.set_label ("Forwarding 1 port");
 				}
 			},
-			Some (Message::ClosePort) => {
-				if let Some (mut old_instance) = forwarding_instance.take () {
+			Some (Message::ClosePort (port_idx)) => {
+				if let Some (old_instance) = forwarding_instances [port_idx].take () {
 					rt.block_on (async {
 						old_instance.shutdown_flag.send (false)?;
 						old_instance.task.await??;
@@ -133,7 +149,7 @@ fn main () -> anyhow::Result <()> {
 					})?;
 				}
 				
-				gui_port.set_forwarding (false);
+				gui_ports [port_idx].set_forwarding (false);
 				frame_status.set_label ("Forwarding 0 ports");
 			},
 			None => (),
@@ -286,7 +302,7 @@ struct ForwardingParams {
 }
 
 impl GuiPort {
-	fn new (fltk_tx: fltk::app::Sender <Message>, x: &mut i32, y: i32) -> Self {
+	fn new (fltk_tx: fltk::app::Sender <Message>, x: &mut i32, y: i32, port_idx: usize) -> Self {
 		let margin = 10;
 		let h = 30;
 		
@@ -315,9 +331,9 @@ impl GuiPort {
 		input_server_port.set_value ("5900");
 		
 		but_open.set_trigger (CallbackTrigger::Changed);
-		but_open.emit (fltk_tx, Message::OpenPort);
+		but_open.emit (fltk_tx, Message::OpenPort (port_idx));
 		but_close.set_trigger (CallbackTrigger::Changed);
-		but_close.emit (fltk_tx, Message::ClosePort);
+		but_close.emit (fltk_tx, Message::ClosePort (port_idx));
 		
 		set_active (&mut but_open, true);
 		set_active (&mut but_close, false);