Setup Router logo in white Setup router name logo in white
Get Software

How to Reset the 3com 3CR858-91

Thumbnail image of Setup Router Staff
Setup Router Staff
(Last Updated: ) | Reading Time: 2 minutes

This page guides you through the steps of resetting the 3Com 3CR858-91 router. When you reset your router it reverts to the original factory settings. This is completely different than rebooting the router which only means to cycle the power by turning it off and then on again.

Warning: Resetting your router should not be taken lightly. There are several things you need to consider first:

  • The router username and password will be reset to it's original factory defaults.
  • If you have an Internet password that also will be reset.
  • Any ISP information such as usernames and passwords will need to be re-entered. You might have to call your ISP for more details.
  • Any and all configurations you have made to this router in order to personalize it such as firewalls, and port forwards will need to redone.

Other 3com 3CR858-91 Guides

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

Reset the 3com 3CR858-91

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.

NordVPN is the fastest VPN!

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.
  1. Turn off the router by unplugging the power cord.
  2. Disconnect all the computers and cables from the router. At this point there shoudl be no cords or cables coming out the back of your router.
  3. Take a straight through Ethernet cable and connect it the Ethernet Cable/DSL port on the rear of the router and attach the other end to one of the LAN ports. See figure below.
  4. Now plug the power back into the router. The Alert LED should flash as the router starts up. After around 30 seconds it should start to flash more slowly (2 seconds on and 2 seconds off).
  5. Once again remove the power from the 3Com 3CR858-91 router.
  6. Remove the cable connecting the Ethernet Cable/DSL port to the LAN port.
  7. Reconnect the computer cable to the router LAN port.
  8. Reconnect the power cord to the router and wait until the start up sequence if finished (about 30 seconds). Your router should now be reset to it's original factory settings.

Login to the 3com 3CR858-91

Now that you are finished resetting your router you need to login using the factory defaults. Use this Login Guide to help you.

Change Your Password

After you've logged in to the 3Com 3CR858-91 it's a good idea to change the router's password for security reasons. If you need help coming up with a good password, check out this Choosing a Strong Password guide.

Tip: Once you've changed the password write it down on a piece of paper and attach it to the bottom of the router for future reference.

Don't forget to sign up for NordVPN's promo deal before it's gone.

NordVPN is the fastest VPN deal!

You might notice that most of our site doesn't have ads on it. This is because we use partnerships with companies like NordVPN to keep the site running. Thank you for supporting us by using our referral links.

3com 3CR858-91 Help

Be sure to check out our other 3com 3CR858-91 info that you might be interested in.

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