[EdLUG] Network problem

[Gábor Majoros]

Might be a routing issue at your ISP, not often but happens.

On Sat, 13 Feb 2021, 11:47 Dick Middleton, <dick at lingbrae.com> wrote:

> I've got a really weird problem with my network and I'm at a loss as to
> what to do.
>
> Just after midnight on Thurs problems were noticed.  Things stopped
> downloading from the
> network.  But not everything.
>
> No problems are being seen with Chromebooks and Android phones (wifi) but
> iPod, TV,
> network streamer etc have stopped working.
>
> My main linux desktop computer has no problems but a couple of arch linux
> computers do.
>
> I've narrowed it down using curl; on working systems curling a webpage
>     curl -v http://mirror.bytemark.co.uk I get the index page
> on a non working system it returns nothing - it just hangs waiting.
>
> If I provoke a 404
> curl -v http://mirror.bytemark.co.uk/x then all systems return an error
> web page.
>
> Similar effect with nc
>
> printf "GET / HTTP/1.1\r\nUser-Agent: nc/0.0.1\r\nHost:
> 127.0.0.1\r\nAccept: */*\r\n\r\n"
> | nc mirror.bytemark.co.uk 80
>
> It looks like a routing error but if that was the case all systems would
> fail and the
> error page would also not be returned.
>
> My brother has simple home page which is returned normally from all
> systems; again
> suggesting it's not a routing problem.
>
> I'm totally perplexed and would really appreciate some ideas
>
> Dick
>
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