[Freeipa-users] Freeipa -ssh keys

[Alexander Bokovoy]

On Thu, 25 Apr 2013, naresh reddy wrote:
>Hi all 
>
>my sshd config file
>
>
>#       $OpenBSD: sshd_config,v 1.87 2012/07/10 02:19:15 djm Exp $
>
># This is the sshd server system-wide configuration file.  See
># sshd_config(5) for more information.
>
># This sshd was compiled with PATH=/usr/local/bin:/usr/bin
>
># The strategy used for options in the default sshd_config shipped with
># OpenSSH is to specify options with their default value where
># possible, but leave them commented.  Uncommented options override the
># default value.
>
># If you want to change the port on a SELinux system, you have to tell
># SELinux about this change.
># semanage port -a -t ssh_port_t -p tcp #PORTNUMBER
>#
>Port 22
>#AddressFamily any
>#ListenAddress 0.0.0.0
>#ListenAddress ::
>
># The default requires explicit activation of protocol 1
>#Protocol 2
>
># HostKey for protocol version 1
>#HostKey /etc/ssh/ssh_host_key
># HostKeys for protocol version 2
>#HostKey /etc/ssh/ssh_host_rsa_key
>#HostKey /etc/ssh/ssh_host_dsa_key
>#HostKey /etc/ssh/ssh_host_ecdsa_key
>
># Lifetime and size of ephemeral version 1 server key
>#KeyRegenerationInterval 1h
>#ServerKeyBits 1024
>
># Logging
># obsoletes QuietMode and FascistLogging
>#SyslogFacility AUTH
>SyslogFacility AUTHPRIV
>#LogLevel INFO
>
># Authentication:
>
>#LoginGraceTime 2m
>#PermitRootLogin yes
>#StrictModes yes
>#MaxAuthTries 6
>#MaxSessions 10
>
>RSAAuthentication yes
>PubkeyAuthentication yes
>
># The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
># but this is overridden so installations will only check .ssh/authorized_keys
>#AuthorizedKeysFile     .ssh/authorized_keys
>
>#AuthorizedKeysCommand none
>AuthorizedKeysCommandUser nobody
>
>#AuthorizedPrincipalsFile none
>
># For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
>#RhostsRSAAuthentication no
># similar for protocol version 2
>#HostbasedAuthentication no
># Change to yes if you don't trust ~/.ssh/known_hosts for
># RhostsRSAAuthentication and HostbasedAuthentication
>#IgnoreUserKnownHosts no
># Don't read the user's ~/.rhosts and ~/.shosts files
>#IgnoreRhosts yes
>
># To disable tunneled clear text passwords, change to no here!
>#PasswordAuthentication yes
>#PermitEmptyPasswords no
>#PasswordAuthentication no
>
># Change to no to disable s/key passwords
>#ChallengeResponseAuthentication yes
>#ChallengeResponseAuthentication no
>
># Kerberos options
>#KerberosAuthentication no
>#KerberosOrLocalPasswd yes
>#KerberosTicketCleanup yes
>#KerberosGetAFSToken no
>#KerberosUseKuserok yes
>
># GSSAPI options
>#GSSAPIAuthentication yes
>#GSSAPICleanupCredentials yes
>#GSSAPICleanupCredentials yes
>#GSSAPIStrictAcceptorCheck yes
>#GSSAPIKeyExchange no
>
># Set this to 'yes' to enable PAM authentication, account processing,
># and session processing. If this is enabled, PAM authentication will
># be allowed through the ChallengeResponseAuthentication and
># PasswordAuthentication.  Depending on your PAM configuration,
># PAM authentication via ChallengeResponseAuthentication may bypass
># the setting of "PermitRootLogin without-password".
># If you just want the PAM account and session checks to run without
># PAM authentication, then enable this but set PasswordAuthentication
># and ChallengeResponseAuthentication to 'no'.
># WARNING: 'UsePAM no' is not supported in Fedora and may cause several
># problems.
>#UsePAM no
>
>#AllowAgentForwarding yes
>#AllowTcpForwarding yes
>#GatewayPorts no
>#X11Forwarding no
>X11Forwarding yes
>#X11DisplayOffset 10
>#X11UseLocalhost yes
>#PrintMotd yes
>#PrintLastLog yes
>#TCPKeepAlive yes
>#UseLogin no
>UsePrivilegeSeparation sandbox          # Default for new installations.
>#PermitUserEnvironment no
>#Compression delayed
>#ClientAliveInterval 0
>#ClientAliveCountMax 3
>#ShowPatchLevel no
>#UseDNS yes
>#PidFile /var/run/sshd.pid
>#MaxStartups 10
>#PermitTunnel no
>#ChrootDirectory none
>#VersionAddendum none
>
># no default banner path
>#Banner none
>
># Accept locale-related environment variables
>AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
>AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
>AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
>AcceptEnv XMODIFIERS
>
># override default of no subsystems
>Subsystem       sftp    /usr/libexec/openssh/sftp-server
>
># Uncomment this if you want to use .local domain
>#Host *.local
>#       CheckHostIP no
>
># Example of overriding settings on a per-user basis
>#Match User anoncvs
>#       X11Forwarding no
>#       AllowTcpForwarding no
>#       ForceCommand cvs server
>KerberosAuthentication no
>PubkeyAuthentication yes
>UsePAM yes
>#GSSAPIAuthentication yes
GSSAPIAuthentication defaults to 'no' in OpenSSH. We require it set to
'yes' in order to log in with Kerberos ticket. As your other Kerberos
options were disabled as well, the result is predictable.

It looks like you haven't configured this machine with
ipa-client-install since that would have turned GSSAPIAuthentication to
'yes'. Or you did change sshd_config by yourself to non-working state.


-- 
/ Alexander Bokovoy