ZyXEL Communications ZyXEL ZyWALL 2WG - Manual (Page 341)

Chapter 17 Network Address Translation (NAT)
ZyWALL 2WG User’s Guide
341
Figure 194 Port Translation Example
17.6 Port Forwarding Screen
Click ADVANCED > NAT > Port Forwarding to open the Port Forwarding screen.
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If you do not assign a Default Server IP address, the ZyWALL discards all
packets received for ports that are not specified here or in the remote
management setup.
Refer to Figure 114 on page 339 for port numbers commonly used for particular services.
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The last port forwarding rule is reserved for Roadrunner services. The rule is
activated only when you set the WAN Encapsulation to Ethernet and the
Service Type to something other than Standard.