5. Your access point/router performs Network Address Translation (NAT) on the source
IP address and sends the reply through the Internet to the computer or mobile device
that sent the web page request.
Router mode: Manage port triggering for
services and applications
If the access point/router is in router mode, port triggering can function as a dynamic
extension of port forwarding that is useful in these cases:
An application must use port forwarding to more than one local computer (but not
An application must open incoming ports that are different from the outgoing port.
With port triggering, the access point/router monitors traffic to the Internet from an
outbound “trigger” port that you specify. For outbound traffic from that port, the access
point/router saves the IP address of the computer that sent the traffic. The access
point/router temporarily opens the incoming port or ports that you specify in your rule
and forwards that incoming traffic to that destination.
Port forwarding creates a static mapping of a port number or range of ports to a single
local computer. Port triggering can dynamically open ports to any computer when
needed and close the ports when they are no longer needed.
Note: If you use applications such as multiplayer gaming, peer-to-peer connections,
real-time communications such as instant messaging, or remote assistance, we
recommend that you do not disable Universal Plug-N-Play (UPnP, see Improve network
connections with Universal Plug and Play on page 108).
Note: The information in this section and subsections does not apply if the access
point/router is in access point mode.
User Manual231Router Mode: Manage Port
Forwarding and Port Triggering
AC2000 802.11ac Wireless Access Point/Router WAC124
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