ZyXEL Communications Internet Security Appliance ZyWALL5UTM 4.0 - Manual (Page 333)

ZyWALL 5/35/70 Series User’s Guide
333 Chapter 19 VPN Screens
19.18 Telecommuter VPN/IPSec Examples
The following examples show how multiple telecommuters can make VPN connections to a
single ZyWALL at headquarters. The telecommuters use IPSec routers with dynamic WAN IP
addresses. The ZyWALL at headquarters has a static public IP address.
19.18.1 Telecommuters Sharing One VPN Rule Example
See the following figure and table for an example configuration that allows multiple
telecommuters (A, B and C in the figure) to use one VPN rule to simultaneously access a
ZyWALL at headquarters (HQ in the figure). The telecommuters do not have domain names
mapped to the WAN IP addresses 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.
Gateway Domain Name
Update Timer
This field is applicable when you enter a domain name to identify the
ZyWALL and/or the remote secure gateway.
Enter the time period (between 2 and 60 minutes) to wait before the ZyWALL
updates the domain name and IP address mapping through a DNS server.
The ZyWALL rebuilds the VPN tunnel if it finds that the domain name is now
using a different IP address (any users of the VPN tunnel will be temporarily
disconnected).
Enter 0 to disable this feature.
Apply Click Apply to save your changes back to the ZyWALL.
Reset Click Reset to begin configuring this screen afresh.
Table 107 VPN: Global Setting (continued)
LABEL DESCRIPTION