On 24/08/17 20:54, bernbert wrote:

> After restart of sshd the login with putty and ssh from other linux
> clients works. Now I have at least a workaround.


That's good.

> Unfortunately this explains nothing. But I can work now.


A thought I had last night - is it possible you've recently installed an
update to openSSH on the server?

Given SLES11 SP2 is no longer supported by SUSE and no updates have been
released since 2014 (unless you've got Long Term Service Pack Support -
LTSS) it's unlikely but it could explain a configuration file and/or
openSSH binary changing ...

I'm still thinking this is down to something changing between it last
working and until your workaround not. The question is what and where.

HTH.
--
Simon
SUSE Knowledge Partner

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