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Strange L2TP/IPSec VPN problem...

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Strange L2TP/IPSec VPN problem... - 13.Nov.2008 3:21:08 AM   


Posts: 105
Joined: 1.Aug.2003
From: The Netherlands
Status: offline
I'm using ISA2004 with about 40 L2TP/IPSec tunnels. The last few weeks we experienced strange behaviour with 4 of them.
Sometimes they do connect but get an ip address from the VPN Client range, not the ip range specified in the L2TP/IPsec tunnel.
Also the demand dial interface is not present (not viewable) in RRAS. However, if I try to create a L2TP/IPSec VPN, RRAS complains its already present.

The following error appears in the event viewer.

Event Type: Error
Event Source: Microsoft ISA Server Control
Event Category: None
Event ID: 11005
Date:  11/12/2008
Time:  3:10:17 PM
User:  N/A
Microsoft ISA Server Control encountered a failure. The failure occurred during Reading of VPN configuration because the system call MprAdminInterfaceDelete failed. Use the source location 121.3210.4.0.2167.887 to report the failure.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
0000: 8c 03 00 00               Œ...   
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