Understanding the Difference Between Port Triggering and Port Forwarding

Hello.

Question as in the subject. What's the difference between port forwarding and port triggering? I have such options available on the router. If I need to redirect the port, I always use the NAT -> Virtual Server option and there is also the Triggering port option and I'm wondering what it will do if I set the port here instead of in Virtual server.

It won't do you any good
Triggering is such an invention that needs an application from the server that supports it - first of all.
In short: the router is watching the traffic on the triggering ports and if it sees the outgoing packets it will automatically set the forwarding port to the computer from which the traffic came to the triggering port, forwarding the ports you set up. If the traffic disappears, the port forwarding will also disappear after some time.
In a word, port triggering is such a dynamic port forwarding, you can have one and the same port redirected to different computers.
The advantage is that you do not have the port on your router open all the time and you do not have to manually change entries when you change the service provided to another computer, but it also has disadvantages

To faber - are you not writing about UPnP because I also have it on the router and it works exactly as you wrote about triggering. Windows XP supports it after installing the appropriate component and some programs such as RaidenFTP, BItComet

Gelip wrote:

To faber - are you not writing about UPnP because I also have it on the router and it works exactly as you wrote about triggering. Windows XP supports it after installing the appropriate component and some programs such as RaidenFTP, BItComet

There are many differences, the main thing is that you set triggering port and forwarding on the router so you have predefined "when" "for what"
-when -> when "there is traffic on trigger ports"
-for what -> predefined ports
You don't have it in uPnP, it's controlled by the application and windows "XP".

So I have to understand that just like the RaidenFTP program supports UPnP, the specific program must support triggering - did I understand correctly? If so, please provide examples of programs that support triggering.

e.g. mirc;]
that's not how you understand me. You can use the "innate capabilities of the program", that is, for example, an emule that sends data through one port and receives through another. If you set up trigger port and incoming port on your router, you will have a certain port open, which many people are asking for (HID)
But only when broadcasting on the trigger port ... as I wrote earlier