Figure 13-11 Telecommuters Sharing One Vpn Rule Example; Table 13-12 Telecommuters Sharing One Vpn Rule Example - ZyXEL Communications ZyWALL 5 User Manual

of their IPSec routers. The telecommuters must all use the same IPSec parameters but the local IP
addresses (or ranges of addresses) should not overlap.

Figure 13-11 Telecommuters Sharing One VPN Rule Example

Table 13-12 Telecommuters Sharing One VPN Rule Example

FIELDS
My IP Address:
Secure Gateway IP
Address:
Local IP Address:
Remote IP Address:
13.17.2 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 13.11.2), 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.
VPN Screens
HEADQUARTERS
Public static IP address
0.0.0.0 With this IP address only
the telecommuter can initiate the
IPSec tunnel.
192.168.1.10
0.0.0.0 (N/A)
ZyWALL 5 Internet Security Appliance
TELECOMMUTERS
0.0.0.0 (dynamic IP address
assigned by the ISP)
Public static IP address
Telecommuter A: 192.168.2.12
Telecommuter B: 192.168.3.2
Telecommuter C: 192.168.4.15
192.168.1.10
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