Add update #6

content/post/2023/2023-04-16-att-traffic-shaping-makes-websites-unusable.md

@@ -155,3 +155,48 @@ We can draw a few conclusions from these charts:
 -   We are never waiting very long for fresh data to arrive.
 
 In my opinion these patterns rule out any extraneous factors affecting the network and are indicative of intentional manipulation of the TCP stream. If AT&T were to occasionaly drop an incoming packet than the client would never send an acknowledgement to cloudfront and after a little while cloudfront would automatically retransmit that packet, on our client side packet capture we would observe this as a packet coming in with a big delay, if we were being rate limited we would expect to see these delayed packets coming in regularly around the time when we were starting to hit a threshold, it seems likely AT&T is dropping certain inbound packets once the incoming rate reaches around ~350Kbps.
+
+## Update #6 (00:43:00 UTC)
+
+Refer to Update #4 above: I'm getting shut down on the AT&T bizcommunity site. My posts are being marked private, so I'll save them here for posterity.
+
+### Forum Post 1: I'm apparently experiencing extremely aggressive AT&T traffic shaping
+
+URL (was public): https://bizcommunity.att.com/conversations/the-break-room/im-apparently-experiencing-extremely-aggressive-att-traffic-shaping/643c3d81aba4c269accb1a2b
+
+The short of it is that I'm experiencing what appears to be aggressive traffic shaping by AT&T. Many sites are affected, because Cloudflare is one content delivery network for which AT&T is apparently shaping my traffic.
+
+This is a business account.  I have both cell phone devices and a data-only plan "Wireless Broadband Ultra for Router or Hotspt  (sic)" on the account. Only the data-only plan is affected.
+
+Because Cloudflare is such a large content delivery network, this affects millions of websites. A large percentage of the websites I've accessed over the last few days have been affected, forcing me to use a VPN to subvert the problem.
+
+I've added more concrete data in a writeup on my personal website: https://adriano.fyi/post/2023/2023-04-16-att-traffic-shaping-makes-websites-unusable
+
+The data paint a fairly clear picture of traffic shaping.
+
+[ GIF IMAGE FROM ABOVE HERE ]
+[ NOTE: web-assets.strava.com resolves to Cloudflare, see the writeup on my site for details ]
+
+I'd love to get a response from AT&T on the matter because this is a major performance degradation to the point that many websites are unusable. Is anyone else experiencing similar issues?
+
+Cheers,
+AC
+
+### Forum Post 2: Are all new posts here marked as private?
+
+URL (currently public): https://bizcommunity.att.com/conversations/the-break-room/are-all-new-posts-here-marked-as-private/643c866bb67b2d067eb0985c
+
+I posted earlier today regarding a traffic shaping issue that I'm experiencing. The title of the post is "I'm apparently experiencing extremely aggressive AT&T traffic shaping". When I came back to check for any responses, I see that my previous post is marked as "Private", which I don't believe was under my control, and certainly wasn't my intention.
+
+This post is a test to see whether posts are automatically flagged as private, or if someone took action on my last post to mark it as private.
+
+[edit] As of 2023-04-16 23:37 UTC, this post is not Private like my previous post.
+
+
+### Response and followup to Forum Post 2
+
+Notice the `Private` label on my response. So it looks to others like I impolitely never respond to their polite response.
+
+![respones and followup to forum post 2](/img/att_bizcommunity_marked_private.png "getting shut down in bizcommunity")
+
+