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3com 3CR858-91 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 3com 3CR858-91 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.

When shopping for a VPN, make sure that they meet the following criteria:

  • Your VPN provider should have a no-logs policy. This means that they do not keep any logs of any kind.
  • Make sure that your VPN provider has lots of exit nodes all around the world.
  • 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.

Based in Panama, using diskless servers, and with over 6,100 servers in 61 countries, we can safely say that NordVPN satisfies all of these requirements.

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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 3com 3CR858-91 Guides

This is the port forwarding guide for the 3com 3CR858-91. We also have the following guides for the same router:

Configure your Computer to Have a Static IP Address

Port forwarding the 3com 3CR858-91 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 3com 3CR858-91

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To get started forwarding a port you need to login to your 3com 3CR858-91 router. If you are already logged in you can skip this step.

To login to the 3com 3CR858-91, follow our 3com 3CR858-91 Login Guide.

Forward a Port on the 3com 3CR858-91 router

Find The Port Forwarding Section of the 3com 3CR858-91

router status mac address internet IP
This is the status page from your 3com 3CR858-91 router.

After you have logged into the 3Com 3CR858-91 you begin on the Status page. The first step in port forwarding is to click the choice on the left in the side bar labeled Firewall, then below that Virtual Servers.

Configure the Port Forwarding section of your 3com 3CR858-91

Now to forward a port, make the following changes:

port forwarding nat screenshot
This is the port forwarding page from your 3com 3CR858-91 router.

On this new page, click the button labeled Add.

Starting on the left, place your cursor in the box labeled LAN IP Address, this is where you enter the IP Address that you want to forward these ports to. If you are forwarding ports so you can run a program on your computer, make sure that you use your computer's IP Address in this box.

Next is Protocol Type use the drop down menu to choose the type of protocol you wish to use.

Enter the port number you wish to forward in the LAN Port and the Public Port boxes.

Finally, check the Enable box, and Apply before continuing.

Test if Your Ports are Open

Now that you have forwarded ports on the 3com 3CR858-91 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 3com 3CR858-91 Info

Don't forget about our other 3com 3CR858-91 info that you might be interested in.

This is the port forwarding guide for the 3com 3CR858-91. We also have the following guides for the same router: