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Thread: NAT Port Triggering

  1. #1

    Thread Starter
    Frenzied Member
    Join Date
    Dec 2012
    Posts
    1,470

    NAT Port Triggering

    I am contemplating developing a VB6 program using NAT Port Triggering. I found this feature on a NAT router (Netgear WNDR3400v3), and it permits temporarily opening up an external port to help maintain the security that a NAT router provides. But what I am having difficulty with is finding how common a feature it is?

    Any feedback would be appreciated. By the way, this particular router does support UPnP, but doesn't respond to any of my requests, so that is why I am looking at this other alternative.

    J.A. Coutts

  2. #2
    PowerPoster
    Join Date
    Feb 2006
    Posts
    24,482

    Re: NAT Port Triggering

    It should be pretty widespread though not ubiquitous. It was a legacy approach with many limitations that predated NAT-PMP and UPnP port forwarding.

    It is most useful when you have only a single client machine that uses an old protocol like FTP or IRC. With only a single client you don't need a NAT router anyway and may as well just throw it away.

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