Chapter 16 Virtual Servers

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.

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ZyWALL USG 1000 User’s Guide