On 15Jun2021 09:12, Geoffrey Leach geoff@hughes.net wrote:
Configuration: Fedora 32 with Netgear Nighthawk R7000 router talking to Hughes satellite.
Problem: Connecting (only) to Amazon, (any) page hangs attempting to download (apparently) an image from images-na.ssl-images-amazon.com. Download succeeds for a dozen or so jpegs, then it hangs. Problem appears to be independent of browser (chrome, firefox) and OS (happens on (gasp) Windows 7 also).
Traceroute images-na.ssl-images-amazon.com shows the round trip time to suddenlink.net around 2000 ms.
That seems large. Is it always around 2000ms or particularly when this fails?
I've a satellite connection to a geosynchronous service (Australian NBN SkyMuster) and ping times are generally in the 600ms-700ms range unless things are very bad.
So why am I bothering the list? It's Amazon's problem, after all.
Question: are there any settings on my end that might be tweaked to get around the problem? Is there any way to diagnose the problem on my end?
I'd start with trying to separate things out a bit. Do you have a log of the image URLs? Is this tied to a specific URL?
Do you run a web proxy? Bypass it.
If you have a list of the URLs (up to and including the stall) you could run a series of _distinct_ wget or curl commands to fetch the images, and see how they behave. This bypasses persistent connections which might be maintained by a web browser (or a batch fetch of many URLs from a single wget/curl command). Thinking about a persistent connection going sour here.
The problem with a persistent connection is that it only takes a single intermediate stateful router to decide to drop the connection state on the floor for things to go bad. Usually you should get a failure and the browser should retry though.
Cheers, Cameron Simpson cs@cskk.id.au