I have VPN 3005 with 4.7.2 OS (latest one to date). I am looking to disable Aggressive Mode processing (stick to Main Mode only) for Remove VPN clients. Please note, Remote VPN clients and NOT LAN-to-LAN connections.
So far I cannot see how this can be done.
TAC engineer is not coming up with good answers as well.
Anyhow has an idea?
I don't think you can make Remote Access VPN on
the Concentrator work with Main mode, unless
you decide to use Certificate instead of
"The Cisco VPN client uses aggressive mode if preshared keys are used and uses main mode when public key infrastructure (PKI) is used during Phase 1 of the tunnel negotiations. After bringing up the Internet Security Association and Key Management Protocol Security Association (ISAKMP SA) for secure communication, the Cisco VPN 3000 concentrator prompts the user to specify the user credentials. In this phase, also known as X-Auth or extended authentication, the VPN 3000 concentrator validates the user against the configured authentication database. If the user authentication is successful, the Cisco concentrator sends a successful authentication message back to the client. After X-Auth, the Cisco VPN client requests configuration parameters such as the assigned IP address, the Domain Name System (DNS) server's IP address, and the Windows Internet Naming Service (WINS) server's IP address. During this phase, known as mode-config, the VPN 3000 concentrator sends the configured parameters back to the client. The final step for a successful VPN tunnel is the negotiation of Phase 2 parameters"