PSA: If you can afford your own a retail router, it’s always a better idea than using the one provided by your ISP. Make no mistake, Xfinity is absolutely collecting (and probably selling) data on the traffic of every device on your network.
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Regardless of the basic privacy invasion that we all know Comcast is doing. Buy your own cable modem and router. Comcast charges you to use theirs, so they pay for themselves in a couple years.
They used to charge you more for unlimited data if you didn't use their modem. Renting their modem plus getting unlimited data was $30/month, but just getting unlimited data with your own modem was $50/month.
Not relevant any more though, as (at least in my area) they completely removed the data caps.
I'm so glad I have a local ISP that provides 10Gbps for cheaper than Comcast's 1Gbps.
Did they change that really recently? That was still a thing two years ago with Comcast. It is the only reason I still have their modem.
The clue is the last line of their comment where they say they have a competitor offering 10Gbps which is why Comcast removed the data cap in their area. AFAIK it's still in place where I'm at because the only other option is CenturyLink 100mbps DSL.
In my area, they removed the data caps last year, when they also rolled out the higher upload speeds (eg the gigabit plan now has 350Mbps upload speed instead of 25Mbps). I don't think they've rolled that out everywhere though.
They also have a habit of keeping people on old plans that are either slower or more expensive. If you're still using Comcast/Xfinity, check their site and see what they offer to new customers at your address. (you may need to use an internet connection other than your Comcast one, otherwise they may detect that you're an existing customer)
Haven't seen that one. Everywhere I've been they tack on $5 a month or so to have their router. Last one I bought was $80 2 years ago, so it's already paid for itself.
Their pricing can differ by region. Not every region got the data caps back when they rolled them out.
It also depends on competition - if there's a lot of competition in your area, Comcast will have better deals compared to if you live somewhere where Comcast is the only option.
I used to live in an apartment that had an exclusivity deal with Comcast (residents were only allowed to use Comcast for internet service). Now I live somewhere in the same county where there's three different fiber providers in addition to Comcast, and their prices here are noticeably cheaper vs the old apartment.
It's always been a ripoff from the start. The modem / router is far cheaper than whatever they charge you to rent it over a year. Additionally they were broadcasting public wifi hotspots from your rented modem for a while (probably still are) and now this. Having said that, walk into any random friend's house, and what will you see? A big stupid rented Comcast modem.
I tried... Comcast would "forget" the modem 3 times a month and would have to call and read them the MAC address again etc... fuck Comcast
Probably a modem problem honestly. I've been on and off comcast a few times and 3 different modems over the years. Only issue I've had were when my old ones got too out dated.
So glad I was able to get an alternate ISP. A good chunk of my life, Comcast was the only high speed ISP in the area.
If alternatives to Comcast were available was something I have been willing to pay higher rent for in my life.
What if you just use it as a pass through by plugging it into their router and then wrap theirs in foil?
They've changed it since covid so now if you use their modem/router combo, you get unlimited data for free. If you don't use their modem and router, you have to pay $30/mo to remove the data caps or keep yourself under 1.2TB for the month.
Yep it will get used by advertisers to know how many times you get up while watching netflix, or by police to know when to conduct a raid.
I remember the scientific article of this technology as a proof of concept. Honestly it didn't take an ISP very long to weaponize it offer it as a service.
Last time I had to use their services I wrapped their modem/router that they forced me to use in a roll of aluminum foil and ran one short ethernet cable out to use my own router with whatever I want. Blocked all their public WiFi you can't turn off and roasted that thing. I was genuinely surprised that it still worked when I gave it back.
Guess I'm injecting metal into my exterior walls and lining my blinds with tin foil
If Google and Apple start doing this with Bluetooth and WiFi on Location Services, they're not that far off the The Dark Knight sonar scene:
I did like that old Reddit post where someone did the math on the charges he’d get for this and everything else was a rounding error compared to the hacking charges
That's what they are deploying. This has been possible for awhile, but has recently gotten much creepier: https://groundy.com/articles/wifi-densepose-full-body-tracking-through-walls-using-your/
I had (still have) my own modem, but switched to their cheep "prepaid" Xfinity NOW service. Fast enough for my needs but I'm annoyed to learn I can only use the refurbished modem they have given me. No idea if its capable of presence monitoring but Its one of their old ones and I'm sure it already leaks metrics I'd rather not share.
OPs article links to another article at TechCrunch . That article states:
As first reported by The Verge, the new Wi-Fi Motion feature works for advanced Xfinity gateways XB7 and newer models and is opt-in, which means users can choose whether to switch on the feature in the Xfinity app.
So it seems like for now it's only this one model that can do it, if you believe them. Frankly, I wouldn't sniff that opt-in claim either because I'm fairly certain I know which orifice they pulled it out of.
If it's just a modem with no WiFi, then it's not capable of this specific thing.
I like my no BS ISP that allows me to use any retail router matching their specs. One thing I just don't have to worry about.
Fun fact: I have my device in airplane mode 90% of the time and only use WiFi. My device ID/name is "Unknown device" specifically so it looks like random or no good. I also use randomized Mac addresses.
I'm free of xfinity/Comcast, but for anyone else I know who uses it, I freely offer my professional IT tips to change DNS, recommend modem/gateway, etc.
Hopefully my personal router isn't being used by the ISP for this sort of thing. Odds are, they probably just do it, because capitalism is sucktackular by default.
And of course all the data will be kept, and sold for profit
Soon they'll add cameras as well that you can hang up in your kids rooms, totally safe, Comcast will make sure the data will be as profitable ad possible, they'll find the right target audience for it
Can they do it with any router, or only the Xfinity branded devices?
Looks like it's a feature of the router they provide you if you don't bring your own.
One more reason I’m glad I bought my own modem and router
just beware this is their implementation but it is possible to detect movement in wifi signal without special equipment. netgear, tp-link and a few more were found to have backdoors in them for authorized remote access via ssh. opnsense, pfsense, ipfire, openwrt i believe haven't been found to include these backdoors, so basically don't trust any closed/proprietary source routers.
At this point, if I didn't build it and install the OS, it isn't secure enough for my home.
I, for one, am looking forward to a plugin to do this with OpenWRT and Home Assistant for my own purposes.
I'm not sure about OpenWRT, but you can do WiFi motion detection with an ESP32.
Yeah, I found that one. Still, I'd prefer it to be built into my WAPs instead of having to use separate hardware, even if I do have extra ESP32s sitting around.
I mean, maybe if I could just tack it on as an extra function on some other device I was already going to be using an ESP32 in, but (especially in microcontroller-land as opposed to full preemptively-multitasking PC land) that sounds like maybe more complexity than I want to deal with.
Wow measuring presence by WiFi attenuation through the walls? That’s a lot more than motion. They’ll be able to tell when there’s a party at your house, or which rooms you use the most, or how often you cook dinner at home, or how long you spend in bed each night.
- Get a wifi router and install OpenWRT on it
- Put your xfinity router at http://10.0.0.1/ into bridge mode plug in your OpenWRT
- Let xfinity fuck itself, you just get a data pipe not spying
You can also buy your own modem to further reduce the dependence on xfinity.
Someone correct me if Arris has been up to shady shit over the past 6 years
Any modem needs the latest DOCSIS which is ostensibly a standard but in practice is a big opaque proprietary blob afacit more or less shared among telecoms that adhere to the "standard". Using an older DOCSIS or one without the Comcast's latest-greatest enhancements (hence the quotes around "standard") will absolutely sacrifice line quality.
Moreover Comcast gives you their latest-best modem for negotiation with their upstream WAN and replaces it when it ages out or gets recalled. With bridge mode enabled, it's as close to a dumb pipe as you're going to get without sacrificing quality.
I would much rather make that sacrifice than trust Comcast everyday of the week. Not disputing you at all but I don’t trust a thing about that company an never will
Edit: and I should add, I haven’t personally noticed any difference in quality
You are trusting them either way. If it is your router to their modem, or your modem to their local relays, either way they can view all the traffic you put across the line.
AT&T doesn't really leave me a choice, I have to use their stupid router/modem, but of course that's treated as a dumb gateway for my own router. I've turned off their wifi radios and enabled their equivalent to gateway mode. It's pretty much the best you can do beside put it in a faraday cage.
The notable step ups you can do is DNS over HTTPS, or full VPN tunneling, although I always assume most the VPN providers are doing the same spying, not to mention the performance hit.
I was just considering this to make pihole installation a bit cleaner. Any good wifi routers to try and get?
Time to wrap the modem in foil
EDIT: it takes way more foil than you’d think to block the ssids from being seen. Make sure to get the top and bottom of the device as well.

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