NETGEARNighthawk DOCSIS 3.1 Mid/high-Split Cable Modem (CM3000-1AZNAS) – Approved for Today’s Fastest Speeds - Works With all Cable Providers, Incl. Xfinity, Spectrum, Cox - Cable Plans up to 2.5Gbps

I recently upgraded to this NETGEAR Nighthawk modem, and it has been amazing. Setup was extremely easy, and it worked perfectly with my Xfinity service right away. The speeds are lightning fast and very stable — I noticed a huge improvement compared to my old modem. The design is sleek and doesn’t take up much space. Highly recommend this for anyone looking for a high-performance modem that supports the latest speeds!

The ISP (which will remain nameless), that I rented my Internet gateway from did not adhere to sound security protocol. I myself, as a cybersecurity professional with more than 10 years experience, am naturally paranoid about weak passwords. This particular ISP limits the variety of keyboard characters allowed for cable modem management passwords, making them easier to crack! In fact, on a few occasions, my passwords were changed without my consent. From that point forward I decided to buy my own cable modem that would allow me to choose the access passwords without character limitations. Now that it is up and running I am beyond happy. My desired security posture is now a reality, and my internet finally achieves 1gb downloads, better than the ISP's cable modem that was supposed to do the same thing. My network is tight security wise, and this Netgear Nighthawk CM2000 helped me realize that. Finally, I had to overcome one technical issue that I thought was generated by the CM2000. After registering my cable modem with Netgear, called tech support. Best dang support I've dealt with in a long time! From one geek to another, we were able to speak the same tech-ease and I learned more about my new CM2000 and the DOCSIS standard than I knew before the call. Found out that the CM2000 was not the culprit, so I called the ISP to handle it, problem resolved. The one setback for Netgear that I thought was serious enough to mention is that as far as firmware upgrades there seems to be tit-for-tat between Netgear and this particular ISP. Either group seems to point the finger at the other when it comes to whose responsibility it is to push out firmware upgrades. I hope, for customers' sake, that these two outfits work out their differences on this. Heavens forbid that there is a security vulnerability that requires a firmware upgrade! I shiver to think about that outcome. Other than that, I am very happy with my purchase.UPDATE (6/2025)It's been a few years since I pinned the above review of the CM2000. Now it's time for an upgrade from the CM2000 to the CM3000. This is what I've learned: The CM2000 performed honorably for the most part. However over time the status LED lights began to shut off one after the other. Today the only one that is still operational is the Online LED. I understand that there are others who've experienced the same malfunctioning LED issues as well. Other than that I am pleased with its performance, so much so that I am considering purchasing it's more mature cousin, the CM3000. The one BIG issue I have with this consumer-class cable modem is what seems to be the unwillingness of its manufacturer Netgear & my cable service provider Xfinity/Comcast to agree on WHO WILL PROVIDE THE FIRMWARE UPGRADES! This was the 800lb gorilla that otherwise would make the experience with this product a 9/10! Just as with the CM2000, Netgear advises users to access their cable service provider for the firmware upgrade for the CM3000. With both devices Xfinity does not have documentation on its website which gives instructions on upgrading the Nighthawk CM model firmware: https://www.xfinity.com/search?q=Netgear%20cm2000 . Similarly, Netgear support encourages users to contact their ISP for upgrades: https://kb.netgear.com/000036375/What-is-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-modem-router . Either way, if there is a need for a future firmware update anyone purchasing this item will risk ending up with an expensive paper weight if both the manufacturer and the ISP refuse to come together and resolve the issue. For this reason I am exploring other cable modem options, ones where firmware updates are available for ISP-approved devices.

Summary: This modem does not work for xfinity customers. Maybe in the future the two companies will resolve the issue, but for now, you should avoid. Get the Arris S34 instead.Pros: Super fast, when it works.Cons: Internet connectivity degrades and then drops for 15-60min every day. The root cause is a firmware issue that causes this for xfinity customers (search for "netgear CM3000 V6.01.03, xfinity" and you will see the widespread complaints). This has been going on since May and neither Netgear or xfinity are owning up to fixing the issue. I wasted hours with customer support on both sides and neither of them had the knowledge to be able to resolve the issue. This is not worth your time.

Works as expected. Easy to setup. The base is is a little wide, which isn’t a big deal, but if you are trying to tuck it away between piece a furniture and the wall it will come out a little further than you’d probably like, depending on the height of the legs of the furniture or where you are wanting to tuck it way at. It’s not a big enough gripe to not buy it. It works great with my 1.3 gig xfinity service.

I recently purchased this modem as I upgraded to Xfinity's gigabit plan, and I wanted to take advantage of the gigabit speeds. I wanted to ensure that my new modem was "future proof" (though there isn't really any such thing), so I went with this modem as it had a 2.5 Gbps WAN port. Setup through Xfinity's app was relatively straight forward and I was able to get connected within ten minutes. One issue that I had in the beginning is that I was maxing out at around 700 Gbps. It seems that this modem is still relatively new and Comcast needs to update their profile to correctly support it. If you unplug your modem or lose power, you will have to call Xfinity to have them retrovision the modem so that you can achieve the correct speeds on a consistent bases. Otherwise, this modem performs as it should and I am happy with the overall speeds. I do recommend.

Works pretty good and easy to setup!