topic connection closed by ssh server in Operating System - Linux

connection closed by ssh server

Maaz — Sat, 15 Aug 2009 10:37:52 GMT

# ssh -v 10.0.0.1
debug1: Authentication that can continue: Public, keyboard-interactive
debug1: Next Authentication method: public
debug1: Trying private key: /root/.ssh/identity
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa

Connection closed by 10.0.0.1
lost connection

#

Please suggest
Regards
Maaz

Re: connection closed by ssh server

Steven Schweda — Sat, 15 Aug 2009 11:40:33 GMT

> Please suggest

How about a useful problem description?

Describe your SSH client system/software.

Describe your SSH server system/software.

Look at the system logs on the server.

> # ssh -v 10.0.0.1

What happens with other client systems?

What happens with other server systems?

What happens with other services, like, say,
Telnet, rsh, and so on?

Re: connection closed by ssh server

Ivan Ferreira — Sat, 15 Aug 2009 21:18:09 GMT

In this case, I would use tcpdump to identify if at least an initial connection is done. From the output of your command, it looks like there is some kind of filtering of the packages. Do you have any host firewall or firewall in between the hosts? Do you have the same problem using another user? Is this problem particular to the 10.0.0.1 host?

Re: connection closed by ssh server

Ivan Krastev — Sun, 16 Aug 2009 04:37:21 GMT

Try to change DNS reverse checks in sshd_config:

UseDNS no

regards,
ivan

Re: connection closed by ssh server

Maaz — Mon, 17 Aug 2009 04:42:10 GMT

Thanks Steven Schweda, Ivan Ferreira and Ivan Krastev for help/suggestions

actually the problem was with wan link/connection b/w ssh client and server(10.0.0.1), and nothing wrong with either the client and server... issue disappear

Thanks
Regards
Maaz