Ubuntu
openssh package

  1. Bug #708493
  2. Comment #26

Comment 26 for bug 708493

Revision history for this message
Schplurtz le déboulonné (schplurtz) wrote : Re: cannot login anymore: Read from socket failed: Connection reset by peer

In my case it was due to an Intrusion Detection System
I have exactly the same problem. upgrade to 11.04 then ssh to the university I work won't work any more. both client and server say "connection reset by peer", limiting the cipher length have it work. Details ares here :

http://schplurtz.free.fr/wiki/envrac/reseau-bizbiz-ssh

Solution :
The Intrusion Detection System detects one of the TCP packets as :

           Malformed Key exchange init Message - SSH protocol violation

and then it sends two reset packets to both the client and server. each of them then says : "connection reset by peer"

The security man removed the rule on the IDS, and then ssh works again ! magic.