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AT&T Wireless traffic shaping apparently making some websites unusable

adriano.fyi

61–70 of 305 posts

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#61

> for some reason, AT&T traffic to fast.com is throttled. Why AT&T wants bandwidth to appear lower than reality is a mystery to me My guess is that Netflix is throttled, and given that fast.com is a Netflix site, fast.com is throttled too.

Since almost everyone usingfast.com on an AT&t network also use AT&t DNS, I'm surprised they don't do something funky with that, for example throttling IPs that did a recent Netflix.com lookup, but not IPs that did a recent fast.com lookup

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#63
post #41

Fun story: I work remotely for an org located in the Bay area. Few months ago I get a call early morning from the IT security person. Apparently someone had been trying to RDP into my work laptop, over a thousand attempts per day for last couple of days. What changed before the last couple of days? My laptop was frequently dropping WiFi connection- a lot of times in the middle of zoom meetings. We use a router provid…

> Placing a device in passthrough mode will remove firewall protection provided by the AT&T gateway Did... did they seriously turn the router into a DMZ*, without your consent? Where every port of your computer is just open to the internet? That's scary. *that's what it was called on my router, the "forward every single port to one device" mode. Not sure if that is the correct term for it.

Passthrough mode turns ~90% of the (DSL modem / ONT) + router + DHCP + NAT + WiFi AP + whatever functionality off, allowing you to add another home router after it which is completely under your control and let the ISP-provided one only do the most necessary, eg. (DSL modem / ONT) parts.

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#64
"Modernizing its search engine has become an obsession at Google"....

No doubt it can be modernized, but just making Google search as good as it used to be would be helpful. And why not better than it used to be with the traditional interface? That would still be worth doing even if Google adds on a superb AI.

Search is the proverbial goose that laid the golden egg and Google is killing it, and I don't mean "killing" in the contemporary ironic usage.

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#65
post #63

Earlier quoted context omitted.

> Placing a device in passthrough mode will remove firewall protection provided by the AT&T gateway Did... did they seriously turn the router into a DMZ*, without your consent? Where every port of your computer is just open to the internet? That's scary. *that's what it was called on my router, the "forward every single port to one device" mode. Not sure if that is the correct term for it.

Passthrough mode turns ~90% of the (DSL modem / ONT) + router + DHCP + NAT + WiFi AP + whatever functionality off, allowing you to add another home router after it which is completely under your control and let the ISP-provided one only do the most necessary, eg. (DSL modem / ONT) parts.

> add another home router after it which is completely under your control and let the ISP-provided one only do the most necessary, eg. (DSL modem / ONT) parts.

Oh absolutely, I used that trick once in order to use a router that I could configure over web interface instead of Over The Cloud With A Spyware Mobile App (aka Internet Of Shit).

Unfortunately my ISP smartened up to this and started cutting the line whenever I tried to use my router. Like, it would work for a while, then they'd shut off service, and it wouldn't work anymore (even if I removed my router) until I called them up and complained.

They would act oblivious like the problem was with my equipment. Every time I asked them why my internet stopped working they would say there was some problem with my hardware. The hardware was brand new and could not have been more fine; they were mistaken. It would also work perfectly when I actually had service; the issue was the ISP kept cutting it because they're petty bastards.

Eventually I gave up, which is probably what they wanted, but it's not like I'm suffering too badly with their equipment, even if I have to use a rooted phone in order to pry away all the spyware permissions from their stupid app.

They are a monopoly so I have no choice.

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#66

Earlier quoted context omitted.

Yeah, except they leak customer data regularly and have offshored tons of customer service to India -- including onboarding. When I tried to sign up, they didn't know what an esim was and wanted my SSN, along with other data that could easily be used to steal my identity. I don't want to spend my days arguing with people, definitely not about the existence of esim; but I did that day. It went all the way up their cus…

ATT has provided the best service of any carrier while traveling, so I will use them. Really? My experience with AT&T while traveling has been pretty awful. In the US, in rural areas, Verizon is better. And outside the US, Google Fi gives you international data roaming as part of the base package. One of the reasons I switched to Google Fi is because it's so much better when traveling.

I used Google Fi for a while, and while I'd love to use them as a primary carrier again, I can't until they choose to support add-on SIMs for watches. As a Google Fi and YoutubeTV customer, I cannot wait until I no longer have to give AT&T any money at all.

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#67

AT&T uses different APNs for regular phone plans and data-only hotspot plans. It's very possible that the phone traffic is being routed completely differently than the hotspot traffic, with congestion at a peering point occurring on the hotspot. AT&T tends to be known for having poor/congested peering. You could try changing the DNS server on your hotspot to a different public resolver like 1.1.1.1 or 8.8.8.8. If Clo…

Good tip. I just tried with both and wasn't routed to a faster point of presence with either.

I'll add a traceroute from the phone and one from a device connected to the LTE router to the updates section next.

[update] Traceroutes added

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#68
post #64

"Modernizing its search engine has become an obsession at Google".... No doubt it can be modernized, but just making Google search as good as it used to be would be helpful. And why not better than it used to be with the traditional interface? That would still be worth doing even if Google adds on a superb AI. Search is the proverbial goose that laid the golden egg and Google is killing it, and I don't mean "killing"…

Wrong thread?

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#69
post #63

Earlier quoted context omitted.

> Placing a device in passthrough mode will remove firewall protection provided by the AT&T gateway Did... did they seriously turn the router into a DMZ*, without your consent? Where every port of your computer is just open to the internet? That's scary. *that's what it was called on my router, the "forward every single port to one device" mode. Not sure if that is the correct term for it.

Passthrough mode turns ~90% of the (DSL modem / ONT) + router + DHCP + NAT + WiFi AP + whatever functionality off, allowing you to add another home router after it which is completely under your control and let the ISP-provided one only do the most necessary, eg. (DSL modem / ONT) parts.

At least on BGW-320's, which are the modern routers for ATT fiber deployments, it keeps flows in the NAT table even if you use it in passthrough mode, although it doesn't actually do NAT, so you end up still being limited to 8192 sessions (not that that's typically a problem, but it does mean you can't e.g. run a big web server through your connection, and you can't use 3p fiber modems without some hacks).

Re: AT&T Wireless traffic shaping apparently making some websites unusable

#70
post #55

But why would AT&T be throttling Cloudfront requests specifically? That's not traffic shaping, it's just dumb. Traffic shaping is slowing down types of traffic like torrents or video in order to prioritize regular sites. But this is degrading regular sites that are usually what benefit from traffic shaping if there's overall network congestion. I'm not questioning anything the author reports, it all seems extremely w…

I think the era of traffic shaping as you describe it is no longer. Most connections are encrypted these days, a good thing. But that also means, me as an ISP in the middle, I only see the layer 4 packet. So I know where a packet is coming from and where it's going (and ttl and some other not really helpful data for this purpose.) I don't even know the port. So I'm left with doing (dumb) traffic shaping by destinatio…

Wait, why wouldn't they know the port? I'm not aware of any cases where the TCP header itself is encrypted.
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