“The Network Connect session terminated. Do you want to reconnect? (nc.windows.app.23711).”

I did some Googling and I came across this support manual from Juniper which discusses the error codes/messages returned by the VPN client software and what could be causing the issue. Error code 23711 Juniper describes the problem as:

“The Network Connect client disconnected from the secure gateway because the
client?s routing table was altered.”

I thought to myself, “What the hell could be changing my routing table?” At first I suspected it might have been a VPN tunneling issue with my Apple Airport Extreme but that known issue has been fixed since early 2007. The issue obviously was being caused by something on my company laptop.

I tried different media (wired vs. wireless) and also updated and rolled back different network drivers to no avail. Another long Google search put me upon this blog entry at kevinluck.com where he states:

After a bit of googling I found out that there were complaints about the early betas of CS3 and the Bonjour service that they installed affecting networking. And this is what was causing my problem. If you press Ctrl-Alt-Del and look at your processes then you will find a ?mDNSResponder.exe? service running after installing Flash CS3. Ending this process allows you to connect through Network Connect.

Presto! Stopping that Process and eventually uninstalling the Bonjour application from my computer fixed my VPN disconnection problem! A big THANK YOU to kevinluck.com for being a great resource and I hope that this blog entry helps others trouble shoot the same issue I had with our Juniper VPN client!

Lord knows I was ready to pull my hair out