login to server ok but cannot login to another server from the first

Colin Law clanlaw at gmail.com
Sat Nov 3 15:43:05 UTC 2018


I believe you can get additional info out of sshd by specifying one or
more -d on the sshd command line.  I think the debug will then be in
auth.log.  I have not done that myself though so perhaps some googling
is required.

Colin
On Sat, 3 Nov 2018 at 15:28, Mark Barton <mark at atldes.com> wrote:
>
> On 11/3/18 10:47 AM, Colin Law wrote:
> > On Sat, 3 Nov 2018 at 14:34, Peter Silva <peter at bsqt.homeip.net> wrote:
> >> how old are the keys?  The new version might have deprecated DSA keys or something?
> >> Perhaps generate newish RSA keys.
> >>
> >> 2nd option: -oIdentitiesOnly=yes
> >> sometimes the credential caching daemon causes the remote to say too many tries.
> >> the above option may help.
> > Would that explain why C->B works and B->A works but not C->B->A?
> >
> > Colin
> >
> >>
> >> On Sat, Nov 3, 2018 at 10:15 AM Colin Law <clanlaw at gmail.com> wrote:
> >>> On Sat, 3 Nov 2018 at 13:52, Mark Barton <mark at atldes.com> wrote:
> >>>> ...
> >>>> The same user name but different keys.
> >>> That is odd, I do it all the time.  So just to recap, you can logon
> >>> directly on B and see
> >>> me at B:~$ ssh A
> >>> with no username specified and it works fine, but if you ssh to B from
> >>> C then you see the same thing
> >>> me at B:~$ ssh A
> >>> but this time it asks for a password?
> >>>
> >>> Colin
> >>>
> >>>>
> >>>> --
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>
> I was able to connect a monitor to that headless
> server (server A) and I verified that I could
> connect to server B using a key. I also tried it
> with a raspberry Pi bypassing the 18.04 server.
> The results where identical which tells me that is
> not specific to the 18.04 install.
>
> Thinking back I might have used a single key for
> each client but I am not sure if that is true is
> all cases.
>
> Colin,
>
> Yes the sequence you described is correct.
>
> Peter,
>
> The keys I'm using are RSA and have been freshly
> generated on each client.
>
>
>
>
>
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