Applications such as video conferences, online gaming, and Internet telephone require multiple connections of the network. A user cannot be able to perform such activities within a network through NAT (Network Address Translation) feature. If a user wants to run a different web application within the network that requires multiple connections, he can do so by specifying the Port within the Trigger Port field. You also have to select the Protocol then have to enter the firewall associate with the trigger port to open them for the inbound traffic. A user can select the protocol from TCP and UDP, directly through the web interface of the dlinkrouter.local window.
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