ZyXEL Communications ZyXEL ZyWALL 35 - Manual (Page 267)

ZyWALL 35 User’s Guide
Chapter 14 VPN Screens 265
With aggressive negotiation mode ( see the Negotiation Mode section ), the ZyWALL can use
the ID types and contents to distinguish between VPN rules. Telecommuters can each use a
separate VPN rule to simultaneously access a ZyWALL at headquarters. They can use
different IPSec parameters. The local IP addresses (or ranges of addresses) of the rules
configured on the ZyWALL 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 ZyWALL located at headquarters. The
ZyWALL 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 ZyWALL at headquarters can also initiate VPN connections to the telecommuters since it
can find the telecommuters by resolving their domain names.
Figure 125 Telecommuters Using Unique VPN Rules Example
Table 83 Telecommuters Using Unique VPN Rules Example
TELECOMMUTERS HEADQUARTERS
All Telecommuter Rules: All Headquarters Rules:
My IP Address 0.0.0.0 My IP Address: bigcompanyhq.com
Secure Gateway Address: bigcompanyhq.com Local IP Address: 192.168.1.10
Remote IP Address: 192.168.1.10 Local ID Type: E-mail
Peer ID Type: E-mail Local ID Content: [email protected]
Peer ID Content: [email protected]
Telecommuter A (telecommutera.dydns.org) Headquarters ZyWALL Rule 1:
Local ID Type: IP Peer ID Type: IP
Local ID Content: 192.168.2.12 Peer ID Content: 192.168.2.12
Local IP Address: 192.168.2.12 Secure Gateway Address: telecommuter1.com
Remote Address 192.168.2.12
Telecommuter B (telecommuterb.dydns.org) Headquarters ZyWALL Rule 2: