[CentOS] SSH Automatic Log-on Failure - Centos 5.5

Thu Jan 27 06:45:47 UTC 2011
Always Learning <centos at g7.u22.net>

Hallo,

I wanted to avoid typing-in my password every occasion I remotely
logged-on to a server.

I created my SSH keys and copied the public part to the server and
renamed it authorized_keys.

My command line is: ssh root at xxxxxx.com -p 1234

The output shows the logging-on routine wants 3 types of authentication.
Surely one successful authentication is sufficient ? 


OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to xxxxxx [123.123.123.123] port 1234.
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 -1
debug1: loaded 3 keys
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.3
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 'xxxxxx' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:4
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: Offering public key: /root/.ssh/id_rsa
debug1: Authentications that can continue:
publickey,gssapi-with-mic,password
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Next authentication method: password

-------------------

files in client /root/.ssh are:-

-rw-------  1 root root 1675 Jan 27 03:11 id_rsa
-rw-r--r--  1 root root  403 Jan 27 03:11 id_rsa.pub
-rw-r--r--  1 root root 2022 Jan 27 03:07 known_hosts

---------------------------------------------

server /root/.ssh

id_rsa.authorized_keys  -rw--------

--------------------------------------------

The only active lines in /etc/ssh/ssh_config are

Host *
GSSAPIAuthentication yes

SendEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY
LC_MESSAGES 
SendEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT 
SendEnv LC_IDENTIFICATION LC_ALL

--------------------------------------------

After commenting-out

GSSAPIAuthentication yes

in /etc/ssh/ssh_config

the remainder of a new debug report is:-

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





All advice most gratefully received.

-- 

With best regards,

Paul.
England,
EU.