Simon Hollenbach <[email protected]> wrote:
> Hi Chris,
> 
> On Sun, 5 Jul 2026 at 21:40, Chris Green <[email protected]> wrote:
> >
> > I have a VPS called isbd.biz and I access it using ssh.  My user
> > account on both my local machine (desktop and laptop) is 'chris' and
> > my user account on isbd.biz is also 'chris'.
> >
> > I have account 'chris' on isbd.biz set up to allow login only using
> > public key authentication.
> >
> > The ip address of isbd.biz is 213.171.194.64.
> >
> > If I log in with 'ssh 213.171.194.64' I, correctly, get prompted for
> > my local system's public key passphrase and I can log in successfully.
> >
> > However if I try 'ssh isbd.biz' I get prompted for "[email protected]'s
> > password" which doesn't exist and I can't log in.
> Your domain also has an AAAA record, could it be that ssh is trying to
> reach that instead of the IP you tested above?
> You should be able to test this by forcing SSH to use IPv4, using `ssh
> -4 isbd.biz`. Sprinkle in some `--verbose` flags if you still don't
> understand what's going on, you can repeat `--verbose` or use multiple
> `-v`s in a row, e.g. `ssh -vvv [...]` to increase verbosity further.
> 
Brilliant! That's what was causing the oddity. 

I can fix the issue simply by adding an entry in ~/.ssh/config but I
wanted to understand (better) what was going on.

Thanks! :-)

-- 
Chris Green
ยท

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