ZyWALL 5 User’s Guide
Chapter 33 Network Address Translation (NAT) 451
5 Enter the inside IP address of the server in the IP Address field. In the following figure,
you have a computer acting as an FTP, Telnet and SMTP server (ports 21, 23 and 25) at
192.168.1.33.
6 Press [ENTER] at the “Press ENTER to confirm …” prompt to save your configuration
after you define all the servers or press [ESC] at any time to cancel.
Note: 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.
Figure 262 Menu 15.2: NAT Server Setup
You assign the private network IP addresses. The NAT network appears as a single host on the
Internet. A is the FTP/Telnet/SMTP server.
Figure 263 Server Behind NAT Example
Menu 15.2 - NAT Server Setup
Default Server: 0.0.0.0
Rule Act. Start Port End Port IP Address
------------------------------------------------------
001 Yes 21 25 192.168.1.33
002 No 0 0 0.0.0.0
003 No 0 0 0.0.0.0
004 No 0 0 0.0.0.0
005 No 0 0 0.0.0.0
006 No 0 0 0.0.0.0
007 No 0 0 0.0.0.0
008 No 0 0 0.0.0.0
009 No 0 0 0.0.0.0
010 No 0 0 0.0.0.0
Select Command= None Select Rule= N/A
Press ENTER to Confirm or ESC to Cancel:
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