which means double 2 points 192.168.1.2::3 in a vnc connection

Question

install real vnc to make connections to a windows server but at the time of accessing me it appears that to access I must approach it with the route

192.168.1.2::3

I understand that : after the IP means port but :: what does it mean?

Answer 1

From the docs:

If you know that VNC Server is listening on a port between 5901 and 5999, append a colon (:) and an identifying number (1 through 99) to the network address, for example:

johndoe:1
192.168.5.54:1
[2001:db8::1]:1

If you know that VNC Server is listening on any other port, append a double colon (::) and the full port number to the network address, for example:

johndoe::6001
192.168.5.54::6001
[2001:db8::1]::6001

Based on what the manual states, your vncserver listens on port 3.