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Difficulty setting up modem - can’t connect to xfinity.com/activate

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New Poster

Difficulty setting up modem - can’t connect to xfinity.com/activate

Hi all,

I’m having difficulty setting up my internet service. My modem is a CM1000 and I can’t connect to xfinity’s activation page. My computer is able to connect to the modem directly via Ethernet, I am being allocated a WAN IP (running ipconfig on my laptop), I can ping my default gateway, but any internet request won’t go through. I’ve checked my DNS settings to see if I needed to use Comcast’s DNS to connect, but that also didn’t help.

What should I do?
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Frequent Visitor

Re: Difficulty setting up modem - can’t connect to xfinity.com/activate

When I use my own modem, I had to call xfinity directly and give them the MAC address of my router before they let me activate it, then I was able to go to the xfinity.com/activate page. Initally it just kept saying it couldn't connect to my router or something. Hope this helps.

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Valued Contributor

Re: Difficulty setting up modem - can’t connect to xfinity.com/activate


@mattejohnson wrote:
Hi all,

I’m having difficulty setting up my internet service. My modem is a CM1000 and I can’t connect to xfinity’s activation page. My computer is able to connect to the modem directly via Ethernet, I am being allocated a WAN IP (running ipconfig on my laptop), I can ping my default gateway, but any internet request won’t go through. I’ve checked my DNS settings to see if I needed to use Comcast’s DNS to connect, but that also didn’t help.

What should I do?

Try calling 1-855-652-3446. That is their device activation line.

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Expert

Re: Difficulty setting up modem - can’t connect to xfinity.com/activate


@mattejohnson wrote:
Hi all,

I’m having difficulty setting up my internet service. My modem is a CM1000 and I can’t connect to xfinity’s activation page. My computer is able to connect to the modem directly via Ethernet, I am being allocated a WAN IP (running ipconfig on my laptop), I can ping my default gateway, but any internet request won’t go through. I’ve checked my DNS settings to see if I needed to use Comcast’s DNS to connect, but that also didn’t help.

What should I do?

Connect it to the coax line and power it up. Let it fully sync up with the system ("DS, "US", and the "Online" lights are steadily lit). Connect a computer to it and open up a browser. You *may* see their "Walled Garden" modem self registration page. If so, follow the screen prompts. Have your mobile telephone number, your Xfinity username and password or the account number and telephone number associated with your Comcast account handy.

If not, try calling 1-855-652-3446. That is their device activation line.

If that doesn't work for you, you can call 1-800-comcast and tell a rep that you would like to have a new modem provisioned for service. Have the RF / CM / HFC MAC address and the serial number of it handy when you call.




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I am a Customer Expert volunteering my time to help other customers here in the Forums.
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Expert

Re: Difficulty setting up modem - can’t connect to xfinity.com/activate

You can also try to access the activation site directly at:

 

https://register.be.xfinity.com/activate


I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
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Expert

Re: Difficulty setting up modem - can’t connect to xfinity.com/activate

Not if they are not getting out.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!