What is Port triggering and how does it work?

What is Port triggering and how does it work?

What Is Port Triggering. Port triggering is a kind of configuration option, available in the NAT enabled router and is a dynamic form of Port Forwarding.

Why can’t I download from the trigger port?

Well the software you have setup port triggering for may not keep sending data out of the trigger port. If it doesn’t your router closes the incoming ports, and your download is interrupted. Port Triggering is a little more secure than port forwarding, because the incoming ports are not open all the time.

What is a port 50 triggering Rule?

This port triggering rule says when data flows out on port 50 forward port 80. In the picture above you see data flowing from a computer to the internet on port 50. The router see’s the traffic coming out of the router on port 50, and evaluates it’s triggering rules.

Why does port triggering not work with a NAT router?

This is because the connection can only be targeted to the IP of the NAT-router, since the internal network is hidden behind NAT. With port triggering, when some host A opens a connection to a host B using a predefined port or ports, then all incoming traffic that the router receives on some predefined port or ports is forwarded to host A.

Port triggering is a dynamic form of the port forwarding model. Generally, port triggering is used when the user needs to use port forwarding to reach multiple local computers. However, port triggering is also used when applications need to open incoming ports that are different from the outgoing port.

What is port forwarding and how does it work?

Port Forwarding sets up public services on your network such as web servers, FTP servers, e-mail servers, or other specialized Internet applications. When users send this type of request to your network via the Internet, the router will forward these requests to the appropriate computer.

Why is my port forwarding not working?

If the software has a port that is constantly sending data out, then port triggering is possible. The length of time that the router keeps those ports open still needs to be taken into account. If the router times out between the gaps of outgoing data, the port forwarding connection will be severed.

How to configure port triggers in Cisco routers?

Step 1: Define the entries in the router for setting up the triggering port. Step 2: This is done by logging in to the router by using a web browser. Select the Service type option for Port triggering and enter the Service Name, Server IP address. Then click on the ADD button and save the settings as shown below.

Is port forwarding static or dynamic?

It is a dynamic form of port forwarding method as the ports will open when required and will be closed when not in use. It needs the unique static IP address for configuration at each of the ports. The IP addresses are assigned automatically when triggered.