Re: ssh issue that I don't understand
Joe <joe@jretrading.com> wrote:
> On Sun, 5 Jul 2026 20:19:12 +0100
> Chris Green <cl@isbd.net> wrote:
>
> > This isn't a problem as such but I don't understand why it's happening
> > and I'd like to understand.
> >
> > 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 "chris@isbd.biz's
> > password" which doesn't exist and I can't log in.
> >
> > 'host isbd.biz' returns the correct IP address for isbd.biz so why
> > does ssh not work using the name rather than the IP address?
> >
>
> Could the issue be that technically isbd.biz is a domain name and not a
> hostname? That ssh is trying to log you into a network account rather
> than a particular computer, and is using the only name it knows you by?
>
It's a single host at that address/domain. As I said it's a VPS and
the isbd.biz domain is mine and has A and AAAA records pointing solely
at the VPS.
As pointed out elsewhere the issue is caused by isbd.biz having an
IPV6 address as well as an IPV4 one.
--
Chris Green
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