Personally I wish they would sell you an unlimited plan at a reasonable price and then give you a discount for months where you use less than the terrabyte. That way you never spend more than you expected and you feel good about saving when you use less. Much better than being surprised and outraged about unexpected charges.
I don't know man, paying for bandwidth you're not using is silly, especially if it's an upstream issue. For the folks that are having problems with increasing bandwidth when the modem is unplugged? Yeah, well that's problematic -- and there's a lot of those on this form and others. A Sync or Unicast ranging ought to be in bytes, Not 100's of Gigs worth of traffic.
More people who are doing Internet Only, need to put in an actual firewall and we could probably crowd source the logs and packet captures live when these events happen. At least we can figure out if it's really physical traffic from some DoS type attack, and you'll know for sure it's not your use or not -- assuming all of your devices including wifi are behind your firewall.
Internet <--> Cable modem <--> pfSense firewall <--> Internal pfSense Lan <--> rest of your stuff including wifi. Don't use the wifi on the Cable modem. Pass all traffic through your firewall.
The box running your firewall doesn't have to be anything special. Now I'm just using a junk laptop with a USB 2.0 Nic for my internal Lan connections. Ought to get you 130-150Mbs at least, which is plenty. It's an old Pentium B960 CPU with 4G ram. I'm using 12-14% of the memory, and <4% of the CPU usually. I suspect you could do it on an old Netbook too.
Streaming 2Mbps 24/7 will rack up 986G worth of traffic in a month. You are probably not doing that, but now you'll be able to see everything on your network and graph them all to find out. You'll also have logs and totals from every source as well as combined total use. Do a packet capture. Look for weird data.
Now you have something to talk about with the security folks -- if they even care.
I posted this last night and they deleted it.
If you have proof of your modem increasing usage when it's off contact Jon Brodkin at Ars Technica. He's doing an article on this. They delete your posts when you mention this so CLEARLY something is messed up.
Saw that. Bookmarked him. Got his PGP key too.
After letting it slip on this form that I'm actually logging data with a firewall after noticing a 30% unaccounted for traffic increase, my bandwidth useage reduced immediately and it appears they were correcting for a week or so while on the "usuage" site. Now, at the end of the month, we're pretty close on agreement of what I used in the month of Sept.
Going forward? We'll see.
I am experiencing the same issue. My husband and I, average 50-60 somethings who do not heavily stream, we are not the 1%ers they refer to as heavy/extreme users. Evening and weekends mostly but we are active busy people with other interests and are outside our homes usually. Xfinity/Comcast data shows in March 2019 was our heaviest use of past months at 248GB...April, May, June July less that 200 GB, AUGUST 2019 48GB. September we have gone over the 1024 cap and on the last day of September it's still going...we are at about 1116 at this point...oh but it's FREE!!! and then we will get one more FREE month to try and figure out all on our own where in the world all this increase has suddenly stemmed from. Before even looking at forums and talking to others I was feeling something shady going on. Now I'm convinced. I will literally PULL my wifi business from Comcast and would rather pay Verizon MORE money for a hotspot, than to continue to give Comcast the satfisfaction of using this shady gimmick and false wifi reporting to get another $50 out of to go unlimited. I love TV, and being on the internet but we already give them hundreds a month...enough!!! They know we are at their mercy and will not stop if we don't stand up.
While we can certain understand your concerns and opinions; if you have any individual account data usage concerns we ask that you please start a new thread here: https://forums.xfinity.com/t5/Your-Home-Network/bd-p/YHN. This will allow our support teams to better track and identify your individual concerns.
Additionally, our CSA department can provide some specific insights into how data is being accounted for on your account. You can contact them directly at 1-877-807-6581 from 6:00 AM - 2:00 AM ET, 7 days a week.
This thread is now locked from receiving new replies as it is off-topic from the original post.
Currently, there is a ticket open with our engineering teams to investigate if there is an issue with the way the data meter is measuring our customer's data usage habits. As of now, we are currently investigating this. If there are any updates or additional information to share I will be sure to add an update to this post. Thank you in advance for your patience as we work to investigate this further.
Apologies all for the issue and the experience that many have described above. Thanks for posting many details here, that was very helpful in having our teams research this issue.
While updating our data usage meter to a new system, a software error occurred resulting in a small number of our customers being billed incorrectly.
We're very sorry for inconveniencing our customers and here's what we're doing to address it: We fixed the technical issue, we're proactively crediting the accounts affected, and we're giving those customers an additional $50 credit to make it right.
Impacted customers have been identified. We are working to identify customers that may have purchased xFi or unlimited data as a direct result of this error.