Draytek Vigor 3100 Series, Руководство пользователя

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Vigor3100 Series User’s Guide 33
Private IP Specify the private IP address of the internal host providing the
service.
Private Port Specify the private port number of the service offered by the internal
host.
Active Check this box to activate the port-mapping entry you have defined.
Note that the router has its own built-in services (servers) such as Telnet, HTTP and FTP etc.
Since the common port numbers of these services (servers) are all the same, you may need to
reset the router’s in order to avoid confliction.
For example, the built-in web configurator in the router is with default port 80, which may
conflict with the web server in the local network, http://192.168.1.13:80. Therefore, you need
to
change the router’s http port to any one other than the default port 80 to avoid conflict,
such as 8080. This can be set in the System Maintenance >>Management . You then will
access the admin screen of by suffixing the IP address with 8080, e.g., http://192.168.1.1:8080
instead of port 80.
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As mentioned above, Port Redirection can redirect incoming TCP/UDP or other traffic on
particular ports to the specific private IP address/port of host in the LAN. However, other IP
protocols, for example Protocols 50 (ESP) and 51 (AH), do not travel on a fixed port. Vigor
router provides a facility
DMZ Host that map ALL unsolicited data on any protocol to a
single host in the LAN. Regular web surfing and other such Internet activities from other
clients will continue to work without inappropriate interruption.
DMZ Host allows a defined
internal user to be totally exposed to the Internet, which usually helps some special
applications such as Netmeeting or Internet Games etc.