TP-Link TL-WR841N User Guide - Page 45

TL-WR841N/TL-WR841ND Wireless N Router Click the Next button to go to the next page and click the Previous button to return the previous page. ) Note: If you set the virtual server of service port as 80, you must set the Web management port on System Tools -> Remote Management page to be any other value except 80 such as 8080. Otherwise there will be a conflict to disable the virtual server. 4.8.2 Port Triggering Choose menu "Forwarding→Port Triggering", you can view and add port triggering in the next screen (shown in Figure 4-26). Some applications require multiple connections, like Internet games, video conferencing, Internet calling and so on. These applications cannot work with a pure NAT router. Port Triggering is used for some of these applications that can work with an NAT router. Figure 4-26 Port Triggering Once configured, operation is as follows: Figure 4-26 1. A local host makes an outgoing connection using a destination port number defined in the Trigger Port field. 2. The router records this connection, opens the incoming port or ports associated with this entry in the Port Triggering table, and associates them with the local host. 3. When necessary the external host will be able to connect to the local host using one of the ports defined in the Incoming Ports field. ¾ Trigger Port - The port for outgoing traffic. An outgoing connection using this port will "Trigger" this rule. ¾ Trigger Protocol - The protocol used for Trigger Ports, either TCP, UDP, or All (all protocols supported by the router). ¾ Incoming Ports Range - The port or port range used by the remote system when it responds to the outgoing request. A response using one of these ports will be forwarded to the PC that triggered this rule. You can input at most 5 groups of ports (or port section). Every group of ports must be set apart with ",". For example, 2000-2038, 2050-2051, 2085, 40