ssh proxy connection used to work with Firefox, now doesn't

[Brian Candler]

On 11/10/2021 10:23, Chris Green wrote:
> If I simply visit the isbd.uk web site directly using Firefox then
> everything works as it should (and it is an HTTPS site so the
> certificates are being used/seen by Firefox).
>
> It's only when I try and use isbd.uk as a proxy to other (definitely
> OK sites, e.g. duckduckgo.com, google.co.uk, etc.) that I get the error.

Ah in that case, what I described was not the problem, sorry. Somehow 
Firefox doesn't like using the proxy on 1080.

Using tcpdump on localhost might show you how far it gets into the 
connection attempt.

Determining whether this is a Firefox issue or not might involve using 
some other SOCKS client to test.