Two common site-to-site VPN scenarios are: 1.The site
that you are connecting to is using a third-party product as its VPN
server. In this scenario, use the IPSec tunnel mode method.
• The site that you are connecting to is using ISA Server 2004 as its
VPN server. In this scenario, use the L2TP over IPSec method or use the
In this walk-through, you will configure
ISA Server 2004, configure Cisco PIX 501, and then reconcile the IPSec
policies in ISA Server and PIX.
How to enable a Cisco VPN client computer using
the IPSec protocol, on the internal network, to connect to an external
Cisco VPN Concentrator using the "transparent tunneling" feature through