IPSec Passthrough

["Mark Siler" <msiler@hcin.net>]

I m curious on how IPSec passthrough = works.  I know AH prevents a traditional NAT from occurring, but how do the = SOHO routers (Linksys, D-Link, Ascend, etc) accomplish the IPSec passthrough?  = Do they encapsulate the entire IPSec packet from the client?  I keep = reading about a Transparent Mode and Tunnel Mode, but some of the SOHO routers don t offer that option.  They offer a check box for turning on and off = IPSec Passthrough.



Thanks in advance



Mark