ZyXEL p-662h-61 Guia Do Utilizador

Prestige 662HW Series User’s Guide

243

Chapter 19 VPN Screens

In this example the telecommuters (A, B and C in the figure) use IPSec routers with domain 
names that are mapped to their dynamic WAN IP addresses (use Dynamic DNS to do this).

With aggressive negotiation mode (see

), the Prestige can use 

the ID types and contents to distinguish between VPN rules. Telecommuters can each use a 
separate VPN rule to simultaneously access a Prestige at headquarters. They can use different 
IPSec parameters. The local IP addresses (or ranges of addresses) of the rules configured on 
the Prestige at headquarters can overlap. The local IP addresses of the rules configured on the 
telecommuters’ IPSec routers should not overlap.

See the following table and figure for an example where three telecommuters each use a 
different VPN rule for a VPN connection with a Prestige located at headquarters. The Prestige 
at headquarters (HQ in the figure) identifies each incoming SA by its ID type and content and 
uses the appropriate VPN rule to establish the VPN connection. 

The Prestige at headquarters can also initiate VPN connections to the telecommuters since it 
can find the telecommuters by resolving their domain names.

Table 77   Telecommuters Sharing One VPN Rule Example

My IP Address: 

0.0.0.0 (dynamic IP address assigned 
by the ISP)

Public static IP address 

Secure Gateway IP 
Address:

Public static IP address

0.0.0.0        With this IP address only the 
telecommuter can initiate the IPSec 
tunnel.

Local IP Address: 

Telecommuter A: 192.168.2.12
Telecommuter B: 192.168.3.2
Telecommuter C: 192.168.4.15

192.168.1.10

Remote IP Address: 192.168.1.10

0.0.0.0 (N/A)