NC disconnects every 40 minutes

[ZDW_]

I'm seeing this in my log for a particular user:

2009-05-08 08:46:15 - ive - Closed connection to TUN-VPN port 443 after 727 seconds, with 3033 bytes read (in 18 chunks) and 1688 bytes written (in 15 chunks)
2009-05-08 08:26:51 - ive - Closed connection to TUN-VPN port 443 after 2388 seconds, with 10869 bytes read (in 55 chunks) and 13042 bytes written (in 55 chunks)
2009-05-08 07:45:20 - ive - Closed connection to TUN-VPN port 443 after 2409 seconds, with 13869 bytes read (in 97 chunks) and 9456 bytes written (in 57 chunks)

The user says that after he is disconnected he has to actually restart his computer because his network connectivity is hosed. I've searched for information on this log entry without luck. Anyone know what would cause this connection to close on its own?

[Automate_]

I'm guessing but...

I would check the users local system events - this smells of something going on unique to that machine. Like wireless WEP re-keying cauing a drop (I've seen that in the past). 

 Have them run a continouous ping (ping -t) to make sure it's not ARP or something similar.

-Keith

[stine_]

Depending on your roaming settings, I have seen this happen with users connecting via AT&T wireless as the shuffle the user from one out-bound proxy to another. I have not seen it at a regular interval, it's usually when I'm in the middle of something (i have my SA set to NOT allow roaming)

[Tessian_]

It can't be roaming... I've seen roaming issues with broadband cards and the IVE will have logs showing that UserA changed from IP X to IP Y (regardless of whether it was allowed or not), so if you're not seeing any accompanying logs about his IP address changing then it's not that.

Definitely sounds like a connectivity issue on the client's end. When they say they have to reboot because it's hosed do they mean even after disconnecting NC they still can't surf the internet or anything? Sounds then like this would happen every 40 minutes even off the VPN.

[Beetlejuice_]

Under Authentication - Endpoint Security - Host Checker check to see what your "Perform Check Every" and "Client-side Process, Login inactivity timeout" settings are set to. I bet it's 40 minutes.

I have experienced this problem with some of the IVE versions (not all of them!!) and the work around it to up these settings to a value higher than your Session Timeout in the user role.