We have a Dell Poweredge 2650 with Small Business Server 2003 Premium installed on it behind a Sonicwall Tele2 network security appliance. Routing and Remote access is configured as well as ISA 2000 on the Poweredge. When I connect to the VPN service on SBS 2003 via my Sonicwall, the connection works perfectly for about 3 minutes and then it disconnects. This occurs when using the VPN (remote desktop) and when I just let the connection sit idle. Here is the connection log from the Sonicwall VPN client:
20:50:56.968 Interface added: 10.0.1.102/255.0.0.0 on VPN "WAN Miniport (PPTP)".
20:51:01.296 My Connections\GroupVPN 10.0.1.0 - RECEIVED<<< ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_REQUEST)
20:51:01.296 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_ACK)
20:51:46.828 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_REQUEST)
20:52:01.156 My Connections\GroupVPN 10.0.1.0 - RECEIVED<<< ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_REQUEST)
20:52:01.156 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_ACK)
20:52:46.843 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_REQUEST)
20:53:01.140 My Connections\GroupVPN 10.0.1.0 - RECEIVED<<< ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_REQUEST)
20:53:01.156 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_ACK)
20:53:46.843 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK INFO *(HASH, NOTIFY:KEEPALIVE_REQUEST)
20:54:01.156 My Connections\GroupVPN 10.0.1.0 - RECEIVED<<< ISAKMP OAK INFO *(HASH, DEL)
20:54:01.156 My Connections\GroupVPN 10.0.1.0 - Deleting IPSec SA (OUTBOUND SPI = 2E46A72F INBOUND SPI = FDAABBFF)
20:54:01.156 My Connections\GroupVPN 10.0.1.0 - RECEIVED<<< ISAKMP OAK INFO *(HASH, DEL)
20:54:01.156 My Connections\GroupVPN 10.0.1.0 - Deleting IKE SA (IP ADDR=10.0.1.6)
20:54:01.156 MY COOKIE 2d 74 b6 a1 2e 52 94 a
20:54:01.156 HIS COOKIE 4f 2 69 2f 21 44 c8 91
20:54:39.281
20:54:39.281 My Connections\GroupVPN 10.0.1.0 - Initiating IKE Phase 1 (IP ADDR=10.0.1.6)
20:54:39.312 My Connections\GroupVPN 10.0.1.0 - SENDING>>>> ISAKMP OAK AG (SA, KE, NON, ID, VID, VID, VID, VID)
20:55:02.781 Interface lost: 10.255.100.221
20:55:02.781 Interface lost: 10.0.1.102
This is happening on all our remote clients, all running Windows XP SP2. We have tried this from multiple remote locations and it still happens. Server's ISP is Cbeyond. The connection to the internet for the server is setup like this:
Server -- Sonicwall --- Cbeyond Cisco IAD2400 ---- Internet
VPN Connection Sequence is like this:
Client -- Cbeyond VPN --- SBS 2003 VPN ---- Server
From what I have read on this site and others, people have tried altering the MTU values to fix this. We followed the directions of many of the message boards but none of them fixed anything. The event viewer on SBS 2003 doesn't show anything related to the VPN having an error. We are perplexed as to what this could be.
Anyone have any ideas, your help will be greatly appreciated.
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