Am having big issues configuring VPN (L2TP) passthrough on our Vigor 2960. We have a MacPro server configured as a VPN server - so people can use their own logins for VPN access. The VPN works great when accessed on the local network (if you see what I mean - done for testing). The VPN inbound connection is configured with a DYNDNS address.

On the Vigor, I have set up the following:
NAT -> Port Redirection
UDP 500 redirected to the server
UDP 1701 redirected to the server
UDP 4500 redirected to the server

Also in VPN and Remote Access -> Remote Access Control, I have the Enable L2TP and IPSec checkboxes unchecked.

However none of the VPN packets make it across the Vigor. I am testing on a MacBookPro and there are no racoon entries generated for connection to this VPN.

I have the same configuration in my US office, but with a Cisco and it works fine.

Is anything further needed on the configuration side?

Also any additional pointers would be great.

do you need port 50 open as well?