SSH without password request

Gustavo Souza Lima — Fri, 14 Nov 2008 11:59:35 GMT

I have set the authorized_keys for a unix account to connect via ssh from server1 to server2 without requesting password.
everything is Ok...BUT when a try the first connection I get, when i try the second connection appears this message:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
The RSA host key for svuxger1 has changed,
and the key for the according IP address 10.200.1.240
is unchanged. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
Offending key for IP in /home/getusers/.ssh/known_hosts:74
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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
ff:fe:03:57:33:77:37:ff:02:5c:2d:45:06:5d:1c:33.
Please contact your system administrator.
Add correct host key in /home/getusers/.ssh/known_hosts to get rid of this message.
Offending key in /home/getusers/.ssh/known_hosts:73
RSA host key for svuxger1 has changed and you have requested strict checking.
Host key verification failed.

when a try the third connection I get and when I try the fourth connection that message appears again...and it happen every time.

How Can I solve it???

Thank you since now

Re: SSH without password request

Hemmetter — Fri, 14 Nov 2008 12:10:54 GMT

Hi Gustavo,

First check if there was an IP- or namechange on the target host.

if so:
remove the offending keys from known_hosts file:

Here: Simply delete line number 73 and 74 from file /home/getusers/.ssh/known_hosts
And then try again.

You have to add the new key by typing yes when you were asked to.

rgds
HGH

Re: SSH without password request

Gustavo Souza Lima — Fri, 14 Nov 2008 12:19:08 GMT

Thank you Hemmetter,

You are right....now I understood and I fixed the problem ...

I had two IPs set into the server2...

Bye

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