[GLLUG] Questions about Cygwin/XFree86 - ports and SSH tunneling
PMelson at sequoianet.com
Mon Nov 10 08:32:11 EST 2003
For what it's worth, TCP/6000 is the standard X11 protocol. Usually there is at least one connection per process thread to the display (e.g. there should be one connection per xterm if you only have xterm windows open). XDMCP (X display manager control protocol) is actually TCP/177, which is important to know if you need to tunnel both via SSH.
There's a good example of setting up Putty for remote port forwarding here:
The example is for POP3, IMAP, and SMTP, but should be easily applicable to XDMCP. For X11, just check the box further up on the 'Tunnels' dialog page and enter the display where your local X server is listening. Good luck!
I created a XDMCP session between my W2K and Linux computers. Here are the
results of a netstat on my Windows box.
192.168.80.86:6000 192.168.80.9:32776 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32789 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32790 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32794 TIME_WAIT
192.168.80.86:6000 192.168.80.9:32795 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32796 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32797 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32798 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32799 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32800 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32805 ESTABLISHED
192.168.80.86:6000 192.168.80.9:32808 ESTABLISHED
Why so many connections?
I would like to use Putty to tunnel the XDMCP session. Is there a good
guide for this?
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