Authentication with SSH using public keys

[आशीष शुक्ल Ashish Shukla]

In <200810311652.38230.af300wsm at gmail.com>, Andrew Falanga wrote:
>Hi,
>
>My father recently setup a new 7.0-Release system for some web development.  I 
>use ssh to login remotely.  I've normally not had any trouble configuring 
>authentication through public key encryption using ssh-keygen and such.  I 
>have for myself a id_rsa.pub and an id_rsa key pair that I use for this 
>purpose.
>
>Normally, I just copy, via scp, the file id_rsa.pub to my 
>~/.ssh/authorized_keys file on the remote host and the next time I attempt a 
>login all is well.  That is, I don't have to enter my password.  However, on 
>my Dad's new machine, this isn't the case.  I still have to enter the 
>password.
>
>Now, I've looked through his /etc/ssh/sshd_config file and nothing in there 
>looks odd, or different, from other remote hosts I do this on.  So, I'm 
>embedding a copy/paste of an ssh login session on my father's host 
>using -v -v to ssh:
>
>[/usr/home/andy/MCH]
>-> ssh -v -v malumgat

[...]

>debug1: Authentications that can continue: publickey,keyboard-interactive
>debug1: Next authentication method: publickey
>debug1: Trying private key: /home/andy/.ssh/identity
>debug1: Offering public key: /home/andy/.ssh/id_rsa
>debug2: we sent a publickey packet, wait for reply
>debug1: Authentications that can continue: publickey,keyboard-interactive

It seems OpenSSH (on your dad's box) hasn't recognized your private key, so how 
about checking permissions of ~/.ssh/authorized_keys and ~/.ssh on his box. Or 
how about enabling verbose logging on his box, using 'LogLevel' parameter in 
sshd_config.

HTH
Ashish Shukla
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