Putty:server unexpectedly closed network connection

dyool · 09-16-2006, 03:32 AM

I putty. when I try access to another machine I receive the message of putty

Code:

server unexpectedly closed network connection

Why?
When I do: ssh -X 192.168.1.4 the output is:

Quote:

Read from socket failed: Connection reset by peer

So, the problem maybe is in ssh.

philix · 09-16-2006, 04:29 AM

Hi,

Please check whether there is any firewall using the iptables -L ?
Check whether the SSH server configurations had any restrictive users to login ?

Regards
Good Luck

Philix
God will bless you

dyool · 09-16-2006, 05:13 AM

I chnage the ssd_config and the output now is

Quote:

root@helder-desktop:/home/helder/Desktop# ssh -X 192.168.1.3
The authenticity of host '192.168.1.3 (192.168.1.3)' can't be established.
RSA key fingerprint is b5:cf:6b:bc:c6:a7:fe:d9:fb:26:d2:ba:b1:86:d8:18.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.3' (RSA) to the list of known hosts.
root@192.168.1.3's password:
Permission denied, please try again.
root@192.168.1.3's password:
Permission denied, please try again.
root@192.168.1.3's password:
Permission denied (publickey,password).

dyool · 09-16-2006, 05:45 AM

when I do: ssh -X 192.168.1.4 the output is

Quote:

ssh: connect to host 192.168.1.4 port 22: No route to host

Why?

marcelo.sa · 03-06-2012, 11:54 AM

I putty 0.62. when I try access to another machine with FC16, I receive the message of putty server unexpectedly closed network connection

solution: clear option in putty program: Category -> Connection -> SSH -> Auth -> GSSAPI -> Attempt GSSAPI authentication (SSH-2 only)

jack_9 · 03-06-2012, 12:11 PM

Connect by telnet if possible, And check if sshd service is UP..

jack_9 · 03-06-2012, 12:26 PM

Oho I missed the complete threads.. your sshd service is up..
hmm seems like your root user is blocked.. interesting..

Quote:

Warning: Permanently added '192.168.1.3' (RSA) to the list of known hosts.
root@192.168.1.3's password:
Permission denied, please try again.

However If its possible then use telnet and check the /etc/hosts.allow and /etc/hosts.deny
if it contains your IP

And also check these following files
/var/log/secure, /var/log/auth.log, /etc/ssh/sshd_config and /etc/pam.d/ssh or /etc/pam.d/sshd or /etc/security/access.conf files

linuxguy7820 · 03-06-2012, 12:54 PM

I had a similar issue until I set the Keep Alive in the Putty connection to something other then 0, it seemed to work best around 30 seconds.

marcelo.sa · 03-07-2012, 08:35 PM

Hey people, thanks, but I was not clear, I posted a problem he was having and with the resolution just below this, and I'm new to the forum ... grateful, I will replicate the question along with the solution:

I putty 0.62. when I try access to another machine with FC16, I receive the message of putty server unexpectedly closed network connection

SOLUTION: clear option in putty program: Category -> Connection -> SSH -> Auth -> GSSAPI -> Attempt GSSAPI authentication (SSH-2 only)