I am trying to set up a remote vpn using Cisco VPN client 5.0 (I have also tried version 4.6) and a PIX501 with DES support ONLY. By looking at the logs on the PIX, I can see the client attempting to negotiate phase 1. It only sends 9 attempts (neither of them using DES as encryption) and it stops there and the VPN can't be completed. I expected the vpn client to keep on trying until a match is found. Are there any limitations on this set up.
Your comments are much appreciated !!!
Interesting Observation. Are you using DES with SHA or DES with MD5. From what I can see in the below URL, DES with MD5 is a supported IKE Proposal.
*Pls rate if it helps*