What options do I have if I want to run a VPN using Cisco PIX behing my NAT device (which is separate from the Cisco)? If possible, I would like to run IPSEC but the NAT device as I understand does not support IPSEC. BUT I read that while NAT & IPSEC do not go well together,
IP ESP[tunnel] IP TCP payload may work.
Can anybody advice me on the options I have and what would I recommend to configure on the Cisco PIX and whether the above option (NAT+IPSEC ESP) will work?? Some detailed explanation would be great!