ZyXEL P-2802HW-I1 User Guide - Page 122
Default Server IP Address, Port Forwarding: Services and Port Numbers, Configuring Servers Behind
View all ZyXEL P-2802HW-I1 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 122 highlights
Chapter 9 Network Address Translation (NAT) Screens You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for example both FTP and web service), it might be better to specify a range of port numbers. You can allocate a server IP address that corresponds to a port or a range of ports. 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. 9.4.1 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. 9.4.2 Port Forwarding: Services and Port Numbers Use the Port Forwarding screen to forward incoming service requests to the server(s) on your local network. The most often used port numbers and services are shown in Appendix E on page 373. Please refer to RFC 1700 for further information about port numbers. 9.4.3 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. 122 P-2802H(W)(L)-I Series User's Guide