[GTALUG] Network issues with github

[D. Hugh Redelmeier]

[top posting for context.]

140.82.113.3 is an IP address of github.

It sounds like a GitHub (SSH) server is demanding a kind of
authentication (SSH public key) that your client isn't offering.

Why isn't your client offering an SSH public key?  There are several 
possible reasons.  Right down to the permissions on ~/.ssh .

Have the local business try to ssh somewhere you control.  Observe.
ssh's -v flag may help

| From: Alex Beamish via talk <talk at gtalug.org>
| To: GTALUG Talk <talk at gtalug.org>
| Cc: Alex Beamish <talexb at gmail.com>
| Date: Sat, 28 Nov 2020 16:50:28 -0500
| Subject: [GTALUG] Network issues with github
| 
| Hi All,
| 
| This is probably a blindingly obvious question, but I'm a little stumped.
| I've done a little work for local business, setting up a Linux server
| (Ubuntu), developing some code and pushing it to github. It's all worked
| wonderfully until a few weeks ago, when he had someone in to do something
| to the network. Since then, Things Are Broken in ways that I don't
| understand.
| 
| When I try to do anything with github, I see the response
| 
|   Received disconnect from 140.82.113.3 port 22:2: Connection blocked
| because server only allows public key authentication. Please contact your
| network administrator.
| 
| Because I was worried I'd borked my account, this afternoon I tried again,
| creating a brand-new account and ssh-ing in .. and still got the same
| result.
| 
| My github account works fine from my own machine, and also from my web
| provider (pair.com), so I'm guessing there's something going on within my
| client's network. Suggestions gratefully received.
| 
| Alex
| 
| -- 
| Alex Beamish
| 
| Software Developer / https://ca.linkedin.com/in/alex-beamish-5111ba3
| Speaker Wrangler / Toronto Perlmongers / http://to.pm.org/
| Chair, Sponsorship Committee, TPF / https://www.perlfoundation.org/
| Baritone, Operations Manager / Toronto Northern Lights, 2013 Champions /
| www.northernlightschorus.com
|