All,
Thanks to everyone who made suggestions regarding this problem; I think nearly
every suggestion was relevant. In the end we discovered that we had problems
with:
1. Windows firewall. To get any joy at all we had to turn off the local
firewall. Of course for VPN connections, there's another firewall between our
network and the internet. We can't turn that off (obviously), so IT spent the
best part of the day trying to work out what it was that was being blocked.
All the ports that seemed relevant were enabled as were all the cygwin
executables in use. It still wouldn't work. The trouble is that there
doesn't seem to be a log for Windows firewall, so they were reduced to
sniffing traffic. Life's too short for that.
2. Exporting of the DISPLAY environment var. This worked as suggested, but
confusion reigned because when we changed from logging into the the network
internally to logging via VPN, the IP address changed! (It's obvious when you
realise.) We then spent some time trying to get DNS working, but SunOs needs
an NIS, so we abandoned that as being more trouble than it was worth.
3. When we finally got xclock to come up, we couldn't get our script to
launch it's dialog box. After installing numerous missing fonts into cyqwin,
Bingo!
What we have decided to do is to install cygwin on a little used server on the
internal network and use terminal services to get to it via VPN. The server
isn't running a firewall and everything will be inside our secure netork, so
we think it will work. That's tomorrow's task.
Thanks again for all your help.
--
Terry Coles
64 bit computing with Kubuntu Linux
--
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