Hallo. Just throwing in a quick question to see if anyone got any ideas about this...

I'm unable to create a remote X session with TightVNC viewer.
The local computer is a windows XP box and the remote server is running Slackware 13.

Using Putty on the XP box to connect to Xvnc through a ssh tunnel works just fine. However, when I fire up TightVNC viewer and try to connect to 127.0.0.1 as I'm used to, TightVNC viewer is unable to establish a connection to X. I'm puzzled.

This has worked when I used another XP box as local computer.
I'm running all within my LAN. Can this be a firewall/iptables issue?

Oops... I've obviously posted this in wrong forum category. Sorry about that. Starts this thread in server category too.

127.0.0.1 is your xp machine's loopback IP address, whereas your Slackware machine is supposed to be a remote server(as you said), so slackware machine must has an IP-address, try accessing that IP address from TightVNC as

ip:vnc number

also make sure that the vnc service is on and congfigured on the slackware machine and also that the ports which vnc service uses are opened in the iptables (VNC by default uses TCP port 5900)