ZyXEL 4-port Prestige 792H Router 91-004-342001 Manuel D’Utilisation

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91-004-342001
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Prestige 792H G.SHDSL Router 
14-32  
VPN 
Screens 
14.17.2 
Telecommuters Using Unique VPN Rules Example 
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 section 14.10.1), 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. 
 
Figure 14-11 Telecommuters Using Unique VPN Rules Example 
Table 14-17 Telecommuters Using Unique VPN Rules Example 
HEADQUARTERS TELECOMMUTERS 
All Headquarters Rules: 
All Telecommuter Rules: 
My IP Address: bigcompanyhq.com 
My IP Address 0.0.0.0 
Local IP Address: 192.168.1.10 
Secure Gateway Address: bigcompanyhq.com 
Local ID Type: E-mail 
Remote IP Address: 192.168.1.10