I have 3 existing VPN connection running from Draytek devices to a clients site - all working fine.

I have tried to add another connection to a new router and when I try and initiate the VPN the following error is logged in Syslog

VigorNAT-Traversal: Using draft-ietf-ipsec-nat-t-ike-02/03, no NAT detected

This is using ipsec tunnell with 3DES + Authentication.

Any ideas?

Thanks