Hi,
I have a issue, I have disabled NAT-T on a cisco concentrator as it did'nt seem to be required but as soon as I did this I found that I had one site that had a problem connecting. Basically one person would connect but as soon as the second connects the first gets disconnected but if I re-enable NAT-T then they both can connect with no problems.
They are using a Dlink 604 router with Cisco VPN Software clients.
Thanks