ZyXEL Communications ZyXEL ZyWALL 35 - Manual (Page 266)

ZyWALL 35 User’s Guide
264 Chapter 14 VPN Screens
14.17 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.
14.17.1 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.
Figure 124 Telecommuters Sharing One VPN Rule Example
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).
Table 82 Telecommuters Sharing One VPN Rule Example
FIELDS HEADQUARTERS TELECOMMUTERS
My IP Address: Public static IP address 0.0.0.0 (dynamic IP address
assigned by the ISP)
Secure Gateway IP
Address:
0.0.0.0 With this IP address only
the telecommuter can initiate the
IPSec tunnel.
Public static IP address
Local IP Address: 192.168.1.10 Telecommuter A: 192.168.2.12
Telecommuter B: 192.168.3.2
Telecommuter C: 192.168.4.15
Remote IP Address: 0.0.0.0 (N/A) 192.168.1.10