ZyXEL Communications 662HW Series - Manual (Page 243)

Prestige 662H/HW Series User’s Guide
243 Chapter 19 VPN Screens
19.17.2 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 the Negotiation Mode section ), 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
FIELDS TELECOMMUTERS HEADQUARTERS
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)