Need help setting up SSH public/private key authentication

[ndolf]

I am trying to get ssh to authenticate using public/private keys so that i can setup autossh from another server
This is what i did:
#ssh-keygen -t rsa
#cat id_rsa.pub >> .ssh/authorized_keys

#ssh -v 10.72.82.41
where 10.72.82.41 is local address
i made both dir .ssh and the file authorized_keys to have permission 600. But i still cant authenticate using the key.

And i get authetication failure :

debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 10.72.82.41 [10.72.82.41] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.5
debug1: match: OpenSSH_4.5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.5
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host '10.72.82.41' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
Unknown code krb5 195

debug1: Unspecified GSS failure. Minor code may provide more information
Unknown code krb5 195

debug1: Unspecified GSS failure. Minor code may provide more information
Unknown code krb5 195

debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/identity
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Offering public key: /root/.ssh/id_dsa
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: password

 

[Skeeedunt]

Check your sshd config file to see if AllowRootLogin is set to false.

 

[lousydood]

And keep it false. Login into a regular user account and su to root if necessary.

 

[sciencewhiz]

you need the public key in the authorized_keys on the server and the private key on the client. Based on what you posted, it looks like you were only working on one system.

 

[kamper]

debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/identity
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Offering public key: /root/.ssh/id_dsa
debug1: Authentications that can continue: publickey,gssapi-with-mic,password

Looks like it didn't try the id_rsa you generated but it did find and try an id_dsa, whatever that is from. Make sure id_rsa is in /root/.ssh or specify its location with the -i flag. Also make sure it's 600.

Skeeedunt's recommendation is also good, at least for debugging purposes.

sciencewhiz, it looks like he's sshing to himself.