ZyXEL P-314Plus User Guide - Page 76
Table 4-7 Services & Port Numbers, Configuring a Server behind NAT
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Prestige 314 PLUS Broadband Sharing Gateway with 4-Port Switch In addition to the servers for specified services, NAT supports a default server. A service request that does not have a server explicitly designated for it is forwarded to the default server. If the default is not defined, the service request is simply discarded. 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. The most often used port numbers are shown in the following table. Please refer to RFC 1700 for further information about port numbers. Please also refer to the included disk for more examples and details on NAT. Table 4-7 Services & Port Numbers SERVICES PORT NUMBER ECHO 7 FTP (File Transfer Protocol) 21 Telnet 23 SMTP (Simple Mail Transfer Protocol) 25 DNS (Domain Name System) 53 Finger 79 HTTP (Hyper Text Transfer protocol or WWW, Web) 80 POP3 (Post Office Protocol) 110 NNTP (Network News Transport Protocol) 119 SNMP (Simple Network Management Protocol) 161 SNMP trap 162 PPTP (Point-to-Point Tunneling Protocol) 1723 Configuring a Server behind NAT Follow these steps to configure a server behind NAT: Step 1. Enter 15 in the main menu to go to Menu 15 - NAT Setup. 4-14 NAT