VPN CLinet error Received an invalid or malformed IKE packet

Unanswered Question
May 12th, 2008

Hi we have a VPN 3020 and for some reason we get the following message when successfuly connect to the vpn concentrator, but we can no access any of our applications:

Cisco Systems VPN Client Version 5.0.03.0530

Copyright (C) 1998-2007 Cisco Systems, Inc. All Rights Reserved.

Client Type(s): Windows, WinNT

Running on: 5.1.2600 Service Pack 2

Config file directory: C:\Program Files\Cisco Systems\VPN Client\

1 21:53:41.828 05/12/08 Sev=Warning/2 IKE/0xE300008D

Split-DNS requires Split Tunneling and a primary DNS server

2 21:54:41.828 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 5.0 found

3 21:54:41.828 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x05B3E098

4 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 6.5 found

5 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0xBBA0DB25

6 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 4.1 found

7 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x6DBEB827

8 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 12.15 found

9 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0xD3B3F364

10 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 10.13 found

11 21:54:41.843 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x9FBD5312

12 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 14.3 found

13 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x462E7CD0

14 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 12.2 found

15 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x7DC880A2

16 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 12.11 found

17 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x6C75C87A

18 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 12.0 found

19 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x6D60C62E

20 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 8.10 found

21 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x741149C0

22 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 12.13 found

23 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE3000039

Received an invalid or malformed IKE packet: message id = 0x9F361006

24 21:54:41.906 05/12/08 Sev=Warning/3 IKE/0xE300002C

ISAKMP header invalid: Invalid version 4.3 found

I have this problem too.
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network_team Mon, 05/26/2008 - 06:35

Has anyone come across this problem when in a visitiros network with access to internet only and you are going out via a Checkpoint firewall with smartdefence. Using Cisco VPN client you are able to connect but get malformed packets dropped due to the length. Ceckpoint are saying this is a cisco problem has anyone else had these problems

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