topic Re: Random Xwindow disconnect over VPN in Operating System - OpenVMS

Random Xwindow disconnect over VPN

arun sanghvi — Tue, 27 Mar 2007 11:22:39 GMT

We are noticing random Xwindow disconnect while
conencted to a VMS 8.2 server over a site to site VPN.
Are there any issues in using Xwindow over WAN VPN and the IP assigment as shown below? Are there any workarounds?
Thanks.
Arun Sanghvi

$ define decw$login_norestart true
$ set display/create /node=172.20.39.1/trans=tcpip/server=0'
$ ON ERROR THEN CONTINUE $create/term/detach

Re: Random Xwindow disconnect over VPN

Aaron Sakovich — Tue, 27 Mar 2007 14:15:11 GMT

I tunnel through SSH over my VPN, and rarely get disconnects. The other bene is that I also get compression in the stream. If the VPN times-out due to inactivity, you might find that the keepalive timer in SSH will help to keep your session connected.

Ultimately, the stability of an X-session will only be as good as the stability of your VPN session.

Re: Random Xwindow disconnect over VPN

Robert Gezelter — Tue, 27 Mar 2007 15:09:29 GMT

Arun,

In my experience, disconnects over a VPN are often caused by communications issues with the underlying network. A communications error of some form shows up to processes working within the VPN as very delayed packets, which can break timeouts (I often encounter this when using RDP to get to Windows systems via a VPN).

Check out the underlying communications paths.

- Bob Gezelter, http://www.rlgsc.com

Re: Random Xwindow disconnect over VPN

arun sanghvi — Tue, 27 Mar 2007 15:15:36 GMT

Hello

Â
Thanks for your prompt response. Delayed response time could be an issue since the sender and recipient are using different ISP.

Are there any workaround to resolve time out issue?

Re: Random Xwindow disconnect over VPN

Hoff — Tue, 27 Mar 2007 15:55:47 GMT

I am aware of no workarounds.

By default, TCP routing is quite robust. And remote X over ssh or over VPN can and does work.

The resolution involves finding and fixing whatever is causing the connectivity issues.

Contact the local networking organization(s). Ask them for help. They can monitor the links, and can help localize what is happening. Any number of failures can be occurring here.