On Fri, September 14, 2012 9:06 pm, Karl Vogel wrote: >>> On Fri, 14 Sep 2012 17:09:46 +0200 (CEST), >>> "M. Fioretti" <mfioretti at nexaima.net> said: > > M> Yesterday I completed (fingers crossed) the switch to a different ADSL > M> provider. From the moment I turned on the modem on the new ADSL line, I > M> became unable to ssh into server A. All attempts abort with this > M> message: > M> ssh_exchange_identification: Connection closed by remote host > > This is in the "grasping at straws" category, but have you tried > connecting with a different cipher, like "blowfish" or "3des-cbc"? I confess I had forgotten that this option existed. However, I just tried both cyphers and there is no difference. Thanks for the other suggestion, I'll try that as the server is reachable again. Marco