Configuring The Port Forwarding Screen; Figure 71 Multiple Servers Behind Nat Example - ZyXEL Communications P-660HN User Manual

Chapter 8 Network Address Translation (NAT)
Many residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may
periodically check for servers and may suspend your account if it discovers
any active services at your location. If you are unsure, refer to your ISP.
Default Server IP Address
In addition to the servers for specified services, NAT supports a default server IP address. A
default server receives packets from ports that are not specified in this screen.
If you do not assign a Default Server IP address, the ZyXEL Device discards
all packets received for ports that are not specified here or in the remote
management setup.
Configuring Servers Behind Port Forwarding (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 71 Multiple Servers Behind NAT Example

B=192.168.1.34
C=192.168.1.35

8.3.1 Configuring the Port Forwarding Screen

Click Network > NAT > Port Forwarding to open the following screen.
See Appendix E on page 371
138
LAN
A=192.168.1.33
192.168.1.1
D=192.168.1.36
for port numbers commonly used for particular services.
WAN
IP Address assigned by ISP
P-660HN-Fx User's Guide