ZyXEL Communications P-202 - Manual (Page 139)

P-202H Plus v2 Support Notes
IPSec VPN
1. Using IPSec VPN
What is IPSec?
IPSec is a set of IP extensions developed by IETF (Internet Engineering Task
Force) to provide security services compatible with the existing IP standard
(IPv.4) and also the upcoming one(IPv.6). In addition, IPSec can protect any
protocol that runs on top of IP, for instance TCP, UDP, and ICMP. IPSec is truly
the most extensible and complete network security solution.
IPSec which is based on modern cryptographic technologies enables end-to-end
security so that every single piece of information sent to or from a computer can
be secured. It can also be deployed inside a network to form Virtual Private
Networks (VPNs) where two distincts and disparate networks become one by
connecting them with a tunnel secured by IPSec.
Tunnel mode
IPSec in tunnel mode is normally used when the ultimate destination of the
packet is different from the security termination point. We introduce two tunnel
mode examples:
• Secure Gateway to Secure Gateway
P-202H Plus v2 to P-202H Plus v2 Tunneling
1. Setup P-202H Plus v2 A
2. Setup P-202H Plus v2 B
3. Troubleshooting
4. View Log
This page guides us to setup a VPN connection between two P-202H Plus v2
routers. Please note that, in addition to P-202H Plus v2 to P-202H Plus v2, P-
202H Plus v2 can also talk to other VPN hardwards. The tested VPN hardware
are shown below.
• Cisco 1720 Router, IOS 12.2(2)XH, IP/ADSL/FW/IDS PLUS IPSEC 3DES
• NetScreen 5, ScreenOS 2.6.0r6
• SonicWALL SOHO 2
• WatchGuard Firebox II
• ZyXEL VPN solutions
All contents copyright © 2006 ZyXEL Communications Corporation.
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