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Cisco DPC3825 Port Forwarding Instructions

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Setup Router Staff
(Last Updated: ) | Reading Time: 3 minutes

This page will show you how to setup a port forward on the Cisco DPC3825 router.

Use a VPN Instead

Have you considered using a VPN instead of forwarding a port? For most users, a VPN is a much simpler and more secure choice than forwarding a port.

We use and recommend NordVPN because not only is it the fastest VPN, it includes a new feature called Meshnet that makes forwarding a port no longer necessary for most applications. With NordVPN Meshnet, you can connect to your devices from anywhere in the world, completely secure, over a highly encrypted VPN tunnel.

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  • Your VPN provider should have a no-logs policy. This means that they do not keep any logs of any kind.
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  • Check that your VPN will not affect your speed.
  • Verify that your VPN provider uses WireGuard as the underlying protocol.
  • Many people prefer a VPN provider that is not based in the United States.

This is the list of requirements that we used when we were shopping around for a VPN provider. There are lots of free, shady VPN providers out there that we looked at and dismissed.

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Once you've set up your NordVPN account on multiple computers and enabled Meshnet, you can seamlessly access all of your devices as if they were on the same network. You don't even have to log in to your router. It's very simple.

Every time you click on one of our affiliate links, such as NordVPN, we get a little kickback for introducing you to the service. Think of us as your VPN wingman.

If you are not sure what port forwarding is you can read our What is Port Forwarding guide to help get started.

Other Cisco DPC3825 Guides

This is the port forwarding guide for the Cisco DPC3825. We also have the following guides for the same router:

Configure your Computer to Have a Static IP Address

Port forwarding the Cisco DPC3825 to your computer can be more reliable if you first configure a static IP address on your computer. We have instructions to setup a static IP address for Windows 7, Windows 8, and a variety of other devices on our Static IP Address Settings page.

Please note that while setting up a static IP address on your computer is optional, it is still a very good idea to go ahead and do it. In the long run it will make your port forward much more reliable.

Login To The Cisco DPC3825

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To get started forwarding a port you need to login to your Cisco DPC3825 router. If you are already logged in you can skip this step.

To login to the Cisco DPC3825, follow our Cisco DPC3825 Login Guide.

Forward a Port on the Cisco DPC3825 router

Find The Port Forwarding Section of the Cisco DPC3825

router status mac address internet IP
This is the status page from your Cisco DPC3825 router.

This guide begins on the Gateway Status page of the Cisco DPC3825 router. First, tick the link at the top of the page, in blue, labeled Applications & Gaming. Then below that, tick the tab labeled Port Range Forwarding.

Configure the Port Forwarding section of your Cisco DPC3825

Now to forward a port, make the following changes:

port forwarding nat screenshot
This is the port forwarding page from your Cisco DPC3825 router.

If you want to forward only one port, enter that number in the Start box, and again in the End box. If you want to forward a range of ports, enter the lowest number of the range in the Start box, and the highest number of the range in the End box.

Use the Protocol drop down menu to choose the type of protocol you want to use while forwarding these ports.

Next is the IP Address box. Enter the LAN IP address of the specific computer you are forwarding these ports to.

Put a check mark in the Enable box.

Tick Save Changes at the bottom of the page.

That's all there is to it!

Test if Your Ports are Open

Now that you have forwarded ports on the Cisco DPC3825 you should test to see if your ports are forwarded correctly.

To test if your ports are forwarded you should use our Open Port Check tool.

Other Cisco DPC3825 Info

Don't forget about our other Cisco DPC3825 info that you might be interested in.

This is the port forwarding guide for the Cisco DPC3825. We also have the following guides for the same router: