Regular Web browsing uses a two-way transmission between your computer and the Internet. Other online programs, however, including online games and file sharing software, need to receive signals that originate from the Internet. The port triggering feature on routers tells the router to send these signals to a particular computer on your network, based on a trigger that activates when your computer sends a signal on a monitored port. Writer Bio

What Is Port Triggering Used For on a Router  - 29