Re: ssh issue that I don't understand
On 2026-07-05, Chris Green wrote:
> None of my systems have a known_hosts file, I have it disabled as
> follows:-
>
> HashKnownHosts no
> StrictHostKeyChecking no
> UserKnownHostsFile=/dev/null
> LogLevel=ERROR
>
> Like quite a few people nowadays I find it more of a nusiance than a
> help.
But it protects you from man-in-the-middle attacks which is a bigger
nuisance. And which could cause your problem.
> I can log in to other systems using the hostname rather than the IP
> address. E.g. I have another VPS at gvps.uk and I can log in to that
> using 'ssh gvps.uk'. I can't see any real difference between the
> setup of gvps.uk and isbd.biz in my ~/.ssh/config file but one works
> OK using the hostname and the other doesn't.
If you have problem using hostname it could be a DNS problem.
gvps.uk has no IPv6 but isbd.biz has one.
$ dig +short isbd.biz aaaa
2a00:1098:82::6:1
Is 2a00:1098:82::6:1 the correct IPv6 adress ?
If so could you try ssh 2a00:1098:82::6:1 ?
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