Not able to do ssh

bkcreddy17 · 06-13-2008, 01:34 AM

I am not able to do ssh as root user from my machine to another machine. Other than my machine i am able do ssh as root from any other machine. I am getting this output.

Code:

[root@seas3 ~]# ssh root@192.168.0.29
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
04:fe:10:f8:99:9a:e8:d6:bd:07:66:1c:0c:2a:b2:4d.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:1
RSA host key for 192.168.0.29 has changed and you have requested strict checking.
Host key verification failed.
[root@seas3 ~]#

druuna · 06-13-2008, 01:47 AM

Hi,

You probably changed (reinstalled?) ssh or parts of it, which changed the RSA key. This change is noticed and due to strict checking you are not allowed to ssh.

Like the message says: Add correct host key in /root/.ssh/known_hosts to get rid of this message.

You can also remove the conflicting entry and start ssh, in normal setup you are asked if this key should be added to known_hosts.

Hope this helps.

jschiwal · 06-13-2008, 02:10 AM

If you are connected to the internet and you don't need ssh connections for cron, login as a regular user and use sudo, and disable root logins.

Besides changing the first entry in known_hosts, you may need to edit authorized_keys as well if you use public key authentication.

mohdshakir · 09-04-2008, 12:12 AM

This site suggest deleting the related entry in ~/ssh/known_hosts or delete the file entirely, and set HashKnownHosts in /etc/ssh/ssh_config to no to being able to read the content of the ~/ssh/known_hosts file