Domain: dslreports.com
Stories and comments across the archive that link to dslreports.com.
Comments · 934
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I hope Apple fixes bufferbloat in LTE & 5G
It's just intolerable on LTE and 5G. This was a test I ran today of bloat on tethered android cell phone - 2+ seconds of observed delay: http://www.dslreports.com/spee... Early tests of 5G are equally dismal, with over 1.5 seconds of observed latency under load. As osx adopted fq_codel (RFC8290) last year for their wifi drivers, awareness of this problem has finally made it to at least some of Apple's upper management. Here's hoping it's made it to the lte folk there also!
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Re:Wow!
Corruption of FCC commissioners is a known problem, but this isn't a good example. Selling out the public after leaving office isn't nearly as much of a problem as selling out the public while still in office. You could point to Ajit Pai, and that would probably be accurate, but there are even better examples than him.
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Re:No Electricity = No Internet
I have the same problem in my previous and current home areas even when I have my own local backup power batteries. TWC said there are no backup batteries on their own cable lines on their snail mail notice and online (https://www.dslreports.com/forum/r31589721-HSI-Do-Cable-Nodes-have-Backup-Power, https://www.dslreports.com/for..., https://www.dslreports.com/for..., https://www.dslreports.com/for..., etc.). I am east of LA.
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Re:No Electricity = No Internet
I have the same problem in my previous and current home areas even when I have my own local backup power batteries. TWC said there are no backup batteries on their own cable lines on their snail mail notice and online (https://www.dslreports.com/forum/r31589721-HSI-Do-Cable-Nodes-have-Backup-Power, https://www.dslreports.com/for..., https://www.dslreports.com/for..., https://www.dslreports.com/for..., etc.). I am east of LA.
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Re:No Electricity = No Internet
I have the same problem in my previous and current home areas even when I have my own local backup power batteries. TWC said there are no backup batteries on their own cable lines on their snail mail notice and online (https://www.dslreports.com/forum/r31589721-HSI-Do-Cable-Nodes-have-Backup-Power, https://www.dslreports.com/for..., https://www.dslreports.com/for..., https://www.dslreports.com/for..., etc.). I am east of LA.
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but will comcast send an tech to court that can sa
but will Comcast send an tech to court that can say beyond a reasonable doubt that IP = that user?
and when crossed examined be able to explain why they can do that but can't get the cap meter right
If your system can show that IP = that user then why does also show that users to have used there internet on a day that they had no power and there modem was off?You just have to point to cases in where the ISP systems where off to make the reasonable doubt part kill the case.
http://www.dslreports.com/show...
https://arstechnica.com/inform...
https://arstechnica.com/inform... -
Re:Wait what
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Re:Twitter, LinkedIn, Comcast - they all do it
> When I unplugged my cable box because I don't use it Comcast noticed. I figured
> I'd save the power bill (dang thing gets warm). Comcast sent me a Letter in the
> mail with instructions on how to turn it back on. They assumed I was confused and
> wasn't using it, maybe even afraid to call for help. It is a nice gesture if I was
> 80 years old and couldn't figure out technology. But they too missed me. They
> wanted me to know about all of the Terrific Programming that I was missing.They were actually more concerned about the fact that you weren't watching the extra commercials that they insert into the cable TV stream (Yes!!!). See this thread on DSLReports http://www.dslreports.com/foru... Fewer people watching their inserted ads means less extra revenue for them.
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ask your question in a place
where the people live and breath this stuff 24/7/365. http://www.dslreports.com/forums/
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Re:Still won't see ads if they target older folks.
fyi, and to stop the 127.0.0.1 fanbois, from dsl reports:
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Using 0.0.0.0 instead of 127.0.0.1 is indeed faster because you don't have to wait for a timeout. It also does not interfere if you are running a web server on the local PC.
If you use 0.0.0.0, you may want to add this entry just before your first 0.0.0.0 "blocking" entry:
# Special Entries
0.0.0.0 0.0.0.0 # fix for traceroute and netstat display anomalyWithout that entry, some network status and diagnostic apps will use the hostname associated with your first 0.0.0.0 "blocking" entry as the name of the default IP address (which has caused a number of confused/confusing posts in this and other forums).
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Fake Net Neutrality according to dslreports
Enter Marsha Blackburn, who for years has rubber stamped every whim of sector giants like AT&T and Comcast.
Blackburn has consistently fought against net neutrality. She has also vigorously defended protectionist state laws, written by companies like AT&T and Verizon, that restrict towns and cities from building their own broadband infrastructure (or in some cases striking public/private partnerships). Even in locations these incumbent ISPs refuse to serve (such as her home state of Tennessee, one of the least connected states in the nation). Such laws have one function: protecting incumbent ISP revenues from consumers tired of entrenched duopolies.
Yet now she insists her Open Internet Preservation Act (pdf) will help protect the open internet, despite the fact it blatantly ignores all manner of potential violations, from zero rating and interconnection to paid prioritization deals. The bill also attempts to pre-empt state efforts to protect net neutrality, since again, the real goal is to prevent tougher rules -- not protect consumers.
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Re:Until this administration
The typical way that FCC commissioners are purchased is with a cushy position at the beneficiary company after the deal is done, often in a lobbying capacity. This is perfectly legal as long as no one explicitly admits that this is why that person is getting that job (only quid-pro-quo bribery is illegal in the US). A recent and particularly obvious example of this is Meredith Attwell Baker.
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Re:Legal Phrasing
MADISON RIVER: In 2005, North Carolina ISP Madison River Communications blocked the voice-over-internet protocol (VOIP) service Vonage. Vonage filed a complaint with the FCC after receiving a slew of customer complaints. The FCC stepped in to sanction Madison River and prevent further blocking, but it lacks the authority to stop this kind of abuse today.
So they got fined by the FCC and stopped doing it
https://www.cnet.com/news/telc...
COMCAST: In 2005, the nationâ(TM)s largest ISP, Comcast, began secretly blocking peer-to-peer technologies that its customers were using over its network. Users of services like BitTorrent and Gnutella were unable to connect to these services. 2007 investigations from the Associated Press, the Electronic Frontier Foundation and others confirmed that Comcast was indeed blocking or slowing file-sharing applications without disclosing this fact to its customers.
The FCC ruled against them and they said they'd move to different mechanisms to handle 'high bandwidth customers'.
https://www.eff.org/deeplinks/...
TELUS: In 2005, Canadaâ(TM)s second-largest telecommunications company, Telus, began blocking access to a server that hosted a website supporting a labor strike against the company. Researchers at Harvard and the University of Toronto found that this action resulted in Telus blocking an additional 766 unrelated sites.
This is bad. On the other hand Google and Facebook have also blocked content on political grounds on Youtube and Facebook and everyone told me 'private company, First Amendment doesn't apply'.
Obviously it's Canada so the First Amendment doesn't apply, and neither do FCC rules. It seems very bad though
https://thetyee.ca/News/2005/0...
AT&T: From 2007â"2009, AT&T forced Apple to block Skype and other competing VOIP phone services on the iPhone. The wireless provider wanted to prevent iPhone users from using any application that would allow them to make calls on such âoeover-the-topâ voice services. The Google Voice app received similar treatment from carriers like AT&T when it came on the scene in 2009.
Apple operate a walled garden and if AT&T convinced them to block apps from their store, they can do that. Net Neutrality doesn't affect this
WINDSTREAM: In 2010, Windstream Communications, a DSL provider with more than 1 million customers at the time, copped to hijacking user-search queries made using the Google toolbar within Firefox. Users who believed they had set the browser to the search engine of their choice were redirected to Windstreamâ(TM)s own search portal and results.
They were exposed in the press and backed off the change.
https://www.dslreports.com/sho...
MetroPCS: In 2011, MetroPCS, at the time one of the top-five U.S. wireless carriers, announced plans to block streaming video over its 4G network from all sources except YouTube. MetroPCS then threw its weight behind Verizonâ(TM)s court challenge against the FCCâ(TM)s 2010 open internet ruling, hoping that rejection of the agencyâ(TM)s authority would allow the company to continue its anti-consumer practices.
The service seems pretty terrible but who cares? It's not like you don't have a choice of other mobile carriers if you don't like it.
https://en.wikipedia.org/wiki/...
" Slate's Farhad Manjoo panned the service by suggesting that MetroPCS was able to -
Re:Not the solution for roaming issues
Aside from the commitments that should have come from allocation of public spectrum, VZ gets all kinds of subsidies for rural coverage. They have an established pattern of making commitments in exchange for monopolies then lawyering up and shirking them. This is probably another case where they're ripping off the taxpayer, but the government of these rural states doesn't have the motivation or competence to go up against Verizon's army of house lawyers.
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Dont Buy A Puma 6 Modem
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Re:Internet Recovery Fee
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Re:I do not trust giants worrying about "little gu
Which ISPs are wronging their customer? How are they doing it? I have yet to see any evidence of ISPs actually doing things like slowing connections and blocking sites, just a lot of talk about what they could do.
I would say you don't read the news or are lying about it.
Would you say Comcast suing Chattanooga to prevent it from offering fiber more than talk?
If we stick to just his alone, there are more examples -
Re:A modem is NOT a router!
"Puma-7"
Considering we're talking about Puma-6 here, not a fucking Puma-7...
You're obviously not reading the right fucking thing.
Here's a REAL LINK for you - https://www.dslreports.com/for...
The one you should've fucking clicked on in the goddamned summary.
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Re: A modem is NOT a router!
The latest theory I heard was that the Intel chip is running a virtual router to do packet processing on the CPU instead offloading it to a hardware based system. There is a backend CPU process that runs every few seconds that takes up a lot of CPU and results in packet processing delays. So even under normal conditions these systems see latency spikes every few seconds. The UDP spam overloads the CPU which prevents the virtual machine from doing its job. https://www.dslreports.com/for... has a very long writeup with a lot of details.
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Re:A modem is NOT a router!
Actually this is a pure cable modem issue. http://www.dslreports.com/tool... is a test that can be used to see if your modem is affected. https://www.dslreports.com/tes... lists some of the affected modems. The ARRIS SB6190 is one of the more popular modems on the list that is affected.
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Re:A modem is NOT a router!
Actually this is a pure cable modem issue. http://www.dslreports.com/tool... is a test that can be used to see if your modem is affected. https://www.dslreports.com/tes... lists some of the affected modems. The ARRIS SB6190 is one of the more popular modems on the list that is affected.
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Re:ATT is NOT a charity
They'll go where the money is.
That's the proper way to run a business.
AT&T deserves with extreme prejudice the corporate death sentence, preferably with prosecuting the executives who have broken their word to the American people time and time and time again.
AT&T fails to meet broadband deployment promises
AT&T is slime. My mother's house is a few thousand feet from DSL. They have always been a few thousand feet from DSL, for something like over 2 decades. AT&T's landline business needs to be sold to someone else, and them heavily fined to recover for all their broken promises.
If they have to gut every asset to do it, and rob every pension of every exec. I honestly don't care. It is a simple case of paying for all their broken contracts, preferably with interest.
Make them pay, and make them pay dearly. They should be broken into so many pieces that they never even think of coming back together again.
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What is interesting...
... is how the other ISP(s) in the area are handling this news, and how those other IPS(s) treat customers outside of this geographic area. Comcast's Latest Speed Upgrades Reach Kansas City, Minneapolis
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EZ adware removal & telemetry blocking
All the bloatware can be uninstalled via Powershell:
https://www.techsupportall.com...
Block every telemetry call:
http://www.dslreports.com/foru... -
Re:What is the real deal?
Yep, 802.11fu is definitely going to be the killer solution.
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Sonic?
Does anyone here have any recent experience with Sonic? It used to get great reviews in Yelp. But recently there have been a lot of Yelp reviews by people who had a hard time getting the service set up. DSLReports has better reviews regarding getting the service set up.
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Re:Rogers isn't
The sped test says and shows as a png
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Re:Not magic
You're right, of course. The trouble is, the latency increases aren't reasonable for common consumer networks under load.
Two speedtests I just did on my lightly-loaded hardwired home network (30Mbsp cable from Time Warner):
Throughput is less (rather surprisingly less -- I may want to check some things) with my QoS rules that group connections into individually-throttled categories, but bufferbloat is sane-ish (a brief peak at 250ms was observed, but otherwise under 100ms).
Without QoS, bufferbloat starts at around 1000ms (x10 increase!) and goes up from there.
I'm currently using Shibby's version of Tomato-USB on an overkill dual-core Asus router to accomplish this, though I have used other consumer-ish hardware with reasonable success (including the venerable WRT54G/L/GS) using similar software.
The trick, as I see it, is primarily to ensure that the cable modem (and whatever is directly upstream of it at the head-end) never see enough throughput for their buffers to begin filling by keeping all nearby bottlenecks under my own control.
The other benefit of QoS is that on heavily bandwidth-constrained networks, some tasks can be given higher priorities than other tasks, which is easy when we control the neck of the bottle.
I dated a girl for a bit who had the cheapest Internet she could get: 2Mbps down. Her kids hated it, and web browsing with tablets and phones and laptops was terrible for all of them if anyone was streaming a video (badly) or downloading (slowly). Loud banter over who was "hogging the Internet" and ruining gaming was common, and not unreasonable. It got worse when people would visit. It was really bad.
Best case: They were taking turns using the Internet. In 2014.
After observing this and suggesting she get faster Internet ("no, it's not important to me," she said) I gave her a router with Tomato, did some obvious QoS priorities that were tweaked for that particular situation, and voila: The games worked fine. Web browsing was always quite responsive. Youtube worked (worked meh, but worked), and downloads and BT didn't trash any of the above. Anyone could do whatever they wanted, and the inevitable slowdowns were graceful while responsiveness remained good. The gamer of the house didn't get upset anymore seemingly-randomly.
But that's just one success story. I've been doing tricks like this for over a decade on a myriad of non-enterprise networks, using cheap hardware and thoughtful software.
(Now it's time for someone to pop up and tell me that I've done it all wrong, and that my results are impossible. This always happens on
/. when I write about using Tomato and QoS to solve real, practical problems. I'm ready.) -
Re:Not magic
You're right, of course. The trouble is, the latency increases aren't reasonable for common consumer networks under load.
Two speedtests I just did on my lightly-loaded hardwired home network (30Mbsp cable from Time Warner):
Throughput is less (rather surprisingly less -- I may want to check some things) with my QoS rules that group connections into individually-throttled categories, but bufferbloat is sane-ish (a brief peak at 250ms was observed, but otherwise under 100ms).
Without QoS, bufferbloat starts at around 1000ms (x10 increase!) and goes up from there.
I'm currently using Shibby's version of Tomato-USB on an overkill dual-core Asus router to accomplish this, though I have used other consumer-ish hardware with reasonable success (including the venerable WRT54G/L/GS) using similar software.
The trick, as I see it, is primarily to ensure that the cable modem (and whatever is directly upstream of it at the head-end) never see enough throughput for their buffers to begin filling by keeping all nearby bottlenecks under my own control.
The other benefit of QoS is that on heavily bandwidth-constrained networks, some tasks can be given higher priorities than other tasks, which is easy when we control the neck of the bottle.
I dated a girl for a bit who had the cheapest Internet she could get: 2Mbps down. Her kids hated it, and web browsing with tablets and phones and laptops was terrible for all of them if anyone was streaming a video (badly) or downloading (slowly). Loud banter over who was "hogging the Internet" and ruining gaming was common, and not unreasonable. It got worse when people would visit. It was really bad.
Best case: They were taking turns using the Internet. In 2014.
After observing this and suggesting she get faster Internet ("no, it's not important to me," she said) I gave her a router with Tomato, did some obvious QoS priorities that were tweaked for that particular situation, and voila: The games worked fine. Web browsing was always quite responsive. Youtube worked (worked meh, but worked), and downloads and BT didn't trash any of the above. Anyone could do whatever they wanted, and the inevitable slowdowns were graceful while responsiveness remained good. The gamer of the house didn't get upset anymore seemingly-randomly.
But that's just one success story. I've been doing tricks like this for over a decade on a myriad of non-enterprise networks, using cheap hardware and thoughtful software.
(Now it's time for someone to pop up and tell me that I've done it all wrong, and that my results are impossible. This always happens on
/. when I write about using Tomato and QoS to solve real, practical problems. I'm ready.) -
Re:This is completely a non-issue with the ISPs
cut through routing works when there is no congestion. http://www.dslreports.com/spee...
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Re:Nagle algorithm?
It is entirely probable we've been inside our own filter bubble so long (6 years) we cannot properly communicate with first time readers! some folk explaining the problem... the ietf video shows the benefit from fixing it. https://www.bufferbloat.net/pr... showing the extent: http://www.dslreports.com/spee... you have this entirely backwards: "Buffering can reduce latency, especially under heavy load, by better bandwidth utilization, and allowing faster retransmission of dropped packets. If it is slowing things down, then you should fix the buffering rather than eliminating it." You want enough buffering to absorb bursts, but any more just adds latency. Van Jacobson and kathie nichols calls this distinction good queue and bad queue: https://tools.ietf.org/html/dr... Less buffering (and fair queuing) allows for faster retransmission in particular.
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Go measure
Judging from the first 25 replies, the slashdot readership is suffering from an overdose of eggnog. Here's a link (which has links to results from every ISP), which shows latency under load often measured in seconds. http://www.dslreports.com/spee... The problem with this survey is that there are now plenty of folk that get sub-30ms latencies on their internet - which is what those using bufferbloat fixes get, and the question was if you or your isp was driving improved hardware to get those results. Problem seems to be 99% of the results are worse than that, still, 4+ years after the code to fix first arrived in Linux.
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Re:How can I tell?
Try this no-bullshit speed test with bufferbloat analyzer: https://www.dslreports.com/speedtest
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Re:Not Surprising
Haven't tried them but:
https://www.oo-software.com/en...In addition, some domains that can be blackholed on a router/firewall:
https://www.dslreports.com/for...
https://forums.untangle.com/we... -
Re:Check your internet usage
If you're monitoring at the router level that'll probably give you some idea(as long as the log isn't overwritten). If you're using the tools provided by the ISP? I've seen 20-140GB differences in what they said I've used vs what I've actually used, including two cases where I was out of the country and somehow used 80GB with the modem unplugged. And there's no shortage of people on places like broadbandreports/dslreports having seen the same thing, whether it's some ISP in Europe, the US or Canada.
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devry & ITT used to be good but collage for al
devry & ITT used to be good. But collage for all push made it so you needed an degree so they kind of got roped into the degree system. Now for real good accreditation you needed the full load of filler and fluff with I think masters or higher / phd level professors.
Now unlike the trade schools the professor at the collages they for the most part have little to no real world work experience (out side of the ivy tower)
https://www.dslreports.com/for...
I used to know an Programer who went to an state school got an job and I used some of the stuff he worked and it was very buggy so he did not last to long and got fired / forced to quit and then moved back home. I am not in QA or work for the place he worked at but some of issues where like how that did get passed testing / qa?
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Re:That's an easy one.
Yeah, because responding with sarcasm to your customer's legitimate issues with a poorly designed product is the right response.
http://www.dslreports.com/show...
Also, clearly, the Apple response wasn't sarcasm at least in writing, and it was a silly response too.
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Professors that are not in the real world say how
"Professors" that say how things are done in a real world they have never been in.
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Re:Is it feasible to block Cortana with the router
Running OpenWRT you may want to look into using dsnmasq to do the DNS blocking. From what I have seen there are a number of hosts files that can be used to populate dnsmasq so it blocks the windows spying. And hopefully this doesn't summon APK but one can setup a cron job to automatically populate block lists with various host files sources in OpenWRT which is what I do and it stops a lot of the crap on all devices. If looking for some host files to incorporate check out the source section of this page.
That however won't stop traffic to hard-coded IPs so there you would have to create some outbound firewall rules for the WAN interface that block traffic to specific IPs but that shouldn't be all that difficult -
Re:Is it feasible to block Cortana with the router
I followed these instructions and stopped lots of the telemetry, as far as i know, by blocking all the listed I.P. addresses in my router. http://www.dslreports.com/foru... i'm happy to be corrected by someone more knowledgable!
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Re:Rent-Seeking
it has your passwords and gives them to anyone on the social networks of people who you allow to access your computer Now if this is true then you can demonstrate to me how such a person can get say my internet banking password. But I already know you can't do that because you're lying and your post is a troll.
Look up wifi sense. If you allow someone using Windows 10 or a Windows phone access to your wireless network, it will share that with others. So your buddy Joe's shady cousin can log on to your local network.
This is pretty well documented by Microsoft and others, I'm a little surprised that a W10 expert doesn't know that. Do you really need the citations? Okay, http://bgr.com/2015/08/03/wind...
They did finally kill it after massive outrage: http://www.extremetech.com/com...
As for my other assertations, if you have W10, you've certainly read the security and privacy settings? It's all in there, except for the telemetry part So here ya go: http://arstechnica.com/informa... https://forums.untangle.com/we...
http://www.dslreports.com/foru...
As well, they bypass your hosts file a good bit. Anyone really concerned about privacy should have a non-microsoft firewall in the loop. Note that some sites they don't allow you to block should be allowed os that your computer acts properly.
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Re:Testing Their Servers
If you want a good test of your bandwidth use dslreports.com/speedtest. It connects to a variety of servers and locations instead of straight from your home to your ISP like what often happens on speedtest.net.
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And they were bashing on TWC for sure.
https://www.dslreports.com/for... for a screen shot/capture and discussion.
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Re:Not the first time
Of course, even with the apps it keeps installing all the addware and telemitry. Here is a list of things to remove, and remove again, and again and again... http://www.dslreports.com/foru...
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Re:I betcha!
Crosschecking aurgathor's list against what Microsoft lists as being in the rollup, I see three telemetry updates but no reference to the Win10 malware.
KB3068708 - Update for customer experience and diagnostic telemetry
KB3075249 - Update that adds telemetry points to consent.exe in Windows 8.1 and Windows 7
KB3080149 - Update for customer experience and diagnostic telemetry -
Re:Does it bundle..
I'll 3rd that too. What _exact_ updates are and are not included?
Courtesy of aurgathor, here is a list of updates to avoid. Doe anyone have a more up-to-date list? TIA
KB2505438 - Slow performance in applications that use the DirectWrite API on a computer that is running Windows 7 or Windows Server 2008 R2 = It often breaks fonts (see also KB454826)
KB2670838 - Platform update for Windows 7 SP1 and Windows Server 2008 R2 SP1 = breaks AERO functionality and gives you blurry fonts on some websites
KB2922324 - (reportedly pulled, uninstall it anyway if already installed)
KB2952664 - Compatibility update for upgrading Windows 7 = Windows 7 nagware patch that touts the Windows 10 upgrade
KB2976978 - prepares system for upgrade to Windows 10
KB2977759 - Compatibility update for Windows 7 RTM = W10 Diagnostics Compatibility telemetry
KB2990214 - Update that enables you to upgrade from Windows 7 to a later version of WindowsKB3014460 - affects windows 8 only
KB3015249 - adds more damn telemetry
KB3021917 - Update to Windows 7 SP1 for performance improvements (telemetry)
KB3022345 - Update for customer experience and diagnostic telemetry -> Replaced by KB3080149
KB3035583 - pitches the free Windows 10 upgrade
KB3044374 - prepares system for upgrade to Windows 10
KB3050265 - Windows Update Client for Windows 7: June 2015 = WU service updated to accept upgrade to W10 + other fixes
KB3068707 - Customer experience telemetry points (update appears to be nuked from microsoft.com)
KB3068708 - Update for customer experience and diagnostic telemetry
KB3075249 - Update that adds telemetry points to consent.exe in Windows 8.1 and Windows 7
KB3080149 - Update for customer experience and diagnostic telemetry -
This is why / I like DIYSorry about the 'couplet'. Yet another reason (with price, privacy and ethical concerns about UK taxes) that I prefer, slightly amateur, roll your own, home-automation rather than hooking up with the big providers.
It looks a lot less slick, but it's functional and will only leak information that I choose to the wider intertubes. Also, it's pleasant to talk to and share some community with other like-minded anoraks (geeks, I think in the US). So it's Pi, Perl (yes, I do it for a rather meager living) and X10 (I am hoping to phase that out this year) and upgrades, enhancements at my own rhythm. I actually got burnt by Meraki: http://www.dslreports.com/show..., a while ago, not quite the same thing but hard lesson learnt. As the first post said, so concisely:Oh, fuck it. Be evil and a jackass.
but not in my house...
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Re:This is an entirely predictable development
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Comcast? made a very evil one now seems to be dead
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Re:Guide to Propaganda: How to Use Grammatical Voi
That's a diversion. It's the same coax going into the house, it's the same overall bandwidth on that coax. Comcast is playing with words.
That is incorrect; you don't understand how coax works. It is the same coax cable, but not the same bandwidth. Video is delivered on a separate spectrum in coax cable. Quadrature Amplitude Modulation (QAM) is used to transmit "classic" cable video and consumes spectrum. Most likely Comcast is reclaiming spectrum and using that to stream tv. Separate bandwidth, just as HAM radio and 4g cell networks consumer separate bandwidth.
They also are likely sourcing the content closer to the end user so they don't have to pay interconnect fees. It is also broadly well known that Comcast has a separate physical fiber backbone just for TV. See cbone vs ibone. Like it or not between separated spectrum and separate physical infrastructure this is most assuredly not "delivered over the internet".