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Chapter 16 Virtual Servers
ZyWALL USG 1000 User’s Guide
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The ZyWALL checks virtual servers before it applies to-ZyWALL firewall rules, so to-
ZyWALL firewall rules do not apply to traffic that is forwarded by virtual servers. The
ZyWALL still checks regular (through-ZyWALL) firewall rules according to the source IP
address and mapped IP address.
Some common port numbers are listed in Appendix C on page 703.
16.2 Virtual Server Example
Let's say you want to assign ports 21-25 to one FTP, Telnet and SMTP server (A in the
example), port 80 to another (B in the example) and assign a default server IP address of
192.168.1.35 to a third (C in the example). You assign the LAN IP addresses and the ISP
assigns the WAN IP address. The NAT network appears as a single host on the Internet.
Figure 165 Multiple Servers Behind NAT Example
16.3 Virtual Server Screens
The Virtual Server summary screen provides a summary of all virtual servers and their
configuration, and the Virtual Server Add/Edit screen lets you configure a virtual server.
16.4 Virtual Server Summary Screen
The Virtual Server summary screen provides a summary of all virtual servers and their
configuration. In addition, this screen allows you to create new virtual servers and edit and
delete existing virtual servers.
To access this screen, login to the web configurator. When the main screen appears, click
Network > Virtual Server. The following screen appears, providing a summary of the
existing virtual servers.