Currently I have around 50 users behind an ASA 5510. These users wants to connect to a remote PIX 501 using Cisco VPN client. But this is not working as no more than one Cisco VPN client is not supported on NAT/PAT.
PPTP VPN is another option, but I think its not much secure.
I am thinking of using L2TP over IPSEC. But not sure if it works on PAT. And if more than one users can create vpn connections over a single IP.
Thanks in Advance.