Billion BIPAC 6600, Руководство пользователя

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Billion BIPAC 6600 Broadband Firewall Router
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server with specific port number that stands for the service, e.g. Web (80), FTP (21), Telnet (23), SMTP
(25), POP3 (110), DNS (53), ECHO (7), NNTP (119). When an incoming access request to the router for
specified port is received, it will be forwarded to the corresponding internal server.
For example, if you set the Public Port number 21 (FTP) to be mapped to the IP Address
192.168.1.100, then all the ftp requests from outside users will be forwarded to the local server
with IP address of 192.168.1.100.
Here the Router provides three modes for users to select including Port Forwarding, Port
Mapping, and DMZ.
3.4.3.5.1 Port Forwarding