HP-UX IPSec version A.02.00 Administrator's Guide

HP-UX IPSec Overview
HP-UX IPSec Topologies
Chapter 1 45
Gateway-to-Gateway Topology
Two hosts each reside upon insecure networks (such as insecure
intranets). These hosts need to communicate securely over an insecure
public network (such as the Internet). HP-UX IPSec can be used over a
tunnel between two (non-HP) IPSec gateways to provide additional
end-to-end security.
Figure 1-14 IPSec Gateway-to-Gateway Topology
Secure channel
Internet
Gateway
IPSec
Tunnel
HostX
HP-UX IPSec
Non-HP
Gateway
IPSec
Non-HP
HostA
HP-UX IPSec