ZyXEL Communications LTE5366 Series, Руководство пользователя

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Chapter 10 NAT
LTE5366 Series User’s Guide
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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.
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.
Note: 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.
Port forwarding allows you to define the local servers to which the incoming services will be forwarded.
To change your LTE5366’s port forwarding settings, click
Configuration > Network > NAT > Port
Forwarding . The screen appears as shown.
Note: If you do not assign a Default Server , the LTE5366 discards all packets received for ports
that are not specified in this screen or remote management.
Refer to Appendix D on page 215 for port numbers commonly used for particular services.
Figure 59 Configuration > Network > NAT > Port Forwarding