I'm facing this issue. i know there are so many topics regarding this. Actually I was unable to access the remote server for restarting the SSH service and removing the host key. Any help on this.

debug1: Enabling compatibility mode for protocol 2.0

debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8 ssh_exchange_identification: read: Connection reset by peer

Also I need to know the exact reason behind this.

  • Did you remove the host key? – alpha Apr 19 '18 at 10:45
  • remote server is not accessible. Only through SSH I'm connecting to that server. You mean host key from remote server, if yes, I was unable to remove that as remote server is not in my control. – SANITH Apr 19 '18 at 11:57
  • Sorry im having trouble to understand, you have a local server under your control. And a remote server you cant access at all, the remote server is not under your control? Have you ever been able to ssh to the remote server? – alpha Apr 19 '18 at 13:24
  • Yep, the remote server is not under my control. I've been working on the remote server for the last week without any issue via SSH. – SANITH Apr 20 '18 at 2:49

I was getting this due to my ISP's nameservers in /etc/resolv.conf. These nameservers are often overloaded and if reverse DNS lookup fails sshd will drop the connection. I solved the problem by using more reliable nameservers, e.g.

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