Draytek Vigor2920n User's Guide download pdf (Page 149)

Vigor2920 Series User’s Guide

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number on the first box. The second one will be assigned

automatically later.

Private IP Specify the private IP address of the internal host providing the

service. If you choose Range as the port redirection mode, you will

see two boxes on this field. Type a complete IP address in the first

box (as the starting point) and the fourth digits in the second box (as

the end point).

Private Port Specify the private port number of the service offered by the internal

host.

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 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 Setup. 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.

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 maps 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.

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Draytek Vigor2920n User's Guide Page 149