2 digit port numbers

[supercoe]

It seems the UltraVNC viewer will treat two digit port numbers as 5900+#.
For instance if we use the viewer to connect to a repeater on port 80 it will actually try to connect on port 5980.

Why does this exist?

Could we have an option to turn this off?

[YY]

Yes, both UltraVNC server and viewer are interpreting the port number in this way.

This may be has its purpose: to make it able run as the old VNC that using a parameter called Display Number (a 2-digit number). I'm not sure the exact meaning this parameter, but its syntax is the same as specifying a port no, only it must be a 2-digit number.

If you ask the viewer to connect to a remote host of display number #, the viewer (in general) will use the port 5900+#


So UltraVNC follows this convention, but it has a way to overcome this problem:
Using double colon before the port number, then UltraVNC server and viewer will always treat the specified number as a port number, and will not +5900 to it.

e.g.:
xx.xx.xx.xx::80

[supercoe]

Very good, thanks for the solution YY!