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
Phase2 Proposal 3DES without auth
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