Connecting two Drayteks over IPSec

Posted on 2016-07-20
Last Modified: 2016-07-25
We are currently aiming to connect a Draytek VigorPro 5510 with a Draytek Vigor 3900 using an IPSec tunnel.  The 5510 is the dial out router and the 3900 the dial in.

The configs are as follows:
IKE Phase1 Proposal: AE128 G1
Authentication: SHA1/MD5
Phase2 Proposal 3DES without auth
Auth: All
Perfect forward Secret: Disabled

The error I can see in the Syslog are: Payload malformed and Payload malfornmed after IV

Were stumped on this one and would appreciate some input

Question by:itd-helpdesk
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Accepted Solution

David Atkin earned 500 total points
ID: 41721321
According to this:

The message "Payload Malformed" was received during the IKE exchange. It means the Phase 1 algorithms doesn't match the gateway configuration.

Change the proposal on Phase1 to something else (on both Drayteks) and re-test.

There is a well written article by Draytek for IPSEC VPN Connections - See here:

You will have to register to view the article.

Author Comment

ID: 41727701
Thanks for the reply, I definatly have a good way forward from this.


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