I've got an end user who, up to the last week, was connecting fine to the VPN. He is now experiencing intermittent drops to the Concentrator, and about 4 times a day has to reconnect. I've pulled off the log from the concentrator showing the process:
49339 06/20/2008 16:01:30.140 SEV=4 IKE/123 RPT=3593 10.201.41.51
Group [xxxxxx] User [xxxxxx]
IKE lost contact with remote peer, deleting connection (keepalive type: DPD)
49341 06/20/2008 16:01:30.140 SEV=5 IKE/194 RPT=42521 10.201.41.51
Group [xxxxxx] User [xxxxxxx]
Sending IKE Delete With Reason message: Connectivity to Client Lost.
49343 06/20/2008 16:01:30.140 SEV=4 AUTH/28 RPT=44019 10.201.41.51
User [xxxxxxxxxxx] Group [xxxxxx] disconnected:
Session Type: IPSec/UDP
Bytes xmt: 4553024
Bytes rcv: 560168
Reason: Lost Service
We have set the Peer response timeout on the Client to the max (480 secs) but he's still losing service. We have also upgraded his client to 4.8.01 to see if this makes a difference - it hasn't(I know there are newer versions out there but 4.8.01 seems to work fine for other users!)
We've also had our telco visit the end user and check out the physical line in his house - they reported no fault with the line.
Any ideas where we can go next would be much appreciated.