Open Ports on Your Router for Defender 21101

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Port Forward Staff
July 22, 2021 (Last Updated: ) | Reading Time: 1 minutes

The incoming ports that need to be forwarded for a Defender 21101 DVR are:

Defender 21101 - PC

  • TCP: 80, 5000, 9000, 18004
  • UDP: 80, 5000, 9000, 18004

Forward Ports for a Defender 21101 DVR

You may need to forward ports in your router when you use a Defender 21101 DVR. A port forward allows incoming connection requests from the internet to go straight to a Defender 21101 DVR.

Routers are not designed to allow incoming network requests. A port forward can overcome this limitation.

Before You Forward a Port

You need to know the following things before you can forward a port:

Locate Your Router's IP Address

You can run our free Router Detector software to locate your router's IP address. Our Router Detector tool is free to use and is part of our Network Utilities software.

You can also follow our Find Your Router IP Address article.

Forwarding a Port for a Defender 21101 DVR

We have Network Utilities software that can forward ports for you. Since Network Utilities allows you to both forward and un-forward ports easily you can keep your network security maximized, and then forward ports only when you need them.

Another option is to go through the process of forwarding ports one step at a time. The way to forward a port is:

Some routers need to be rebooted in order for the changes to be saved.

You can choose your router from our list to see exactly how to forward ports for a Defender 21101 DVR:

List of Routers - Customized for Defender 21101

Those are the steps for forwarding ports in your router for a Defender 21101 DVR.

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