[ILUG] ssh access on Redhat 7.2

[Walter Faleiro]

Following  is the sshd file under /etc/pam.d

#%PAM-1.0
auth       required     /lib/security/pam_stack.so service=system-auth
auth       required     /lib/security/pam_nologin.so
account    required     /lib/security/pam_stack.so service=system-auth
password   required     /lib/security/pam_stack.so service=system-auth
session    required     /lib/security/pam_stack.so service=system-auth
session    required     /lib/security/pam_limits.so
session    optional     /lib/security/pam_console.so

Does the above need to be modified to have the ssh access available via
shadow passwords.

--W

On 2/28/07, Walter Faleiro <curtorkar at gmail.com> wrote:
>
> Hi Conor,
> Yes the users exists.
> I tried the following
>
> login as root
> su - username
>
> changed the password for the users on this 7.2 system, and then tried to
> ssh again and it worked.
> So its the way the system reads the nis passwords thats causing the issue
> here.
>
> --W
>
>
> On 2/28/07, Conor Wynne <conor at discuskeeping.com> wrote:
> >
> > Walter Faleiro wrote:
> > > Hi,
> > > Currently we have a nis server configured with RHEL Update8. There are
> > > a few
> > > older clients of Redhat 7.2, with which ssh is having an issue.
> > >
> > > I can ssh as root to the system and it connects fine. If I do su -
> > > username
> > > after connecting it as root it works fine. The problem is
> > > ssh user at system does not work.
> > > The error log shows
> > > sshd(pam_unix)[3255]: authentication failure; logname= uid=0 euid=0
> > > tty=ssh
> > > ruser= rhost=xxx  user=xxxx
> > >
> > > Following are the details of ssh on the Redhat System.
> > >
> > > ssh -V
> > > OpenSSH_2.9p2, SSH protocols 1.5/2.0, OpenSSL 0x0090602f
> > > #       $OpenBSD: sshd_config,v 1.38 2001/04/15 21:41:29 deraadt Exp $
> > >
> > > # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
> > >
> > > # This is the sshd server system-wide configuration file.  See sshd(8)
> > > # for more information.
> > >
> > > Port 22
> > > #Protocol 2,1
> > > #ListenAddress 0.0.0.0
> > > #ListenAddress ::
> > > HostKey /etc/ssh/ssh_host_key
> > > HostKey /etc/ssh/ssh_host_rsa_key
> > > HostKey /etc/ssh/ssh_host_dsa_key
> > > ServerKeyBits 768
> > > LoginGraceTime 600
> > > KeyRegenerationInterval 3600
> > > PermitRootLogin yes
> > > #
> > > # Don't read ~/.rhosts and ~/.shosts files
> > > IgnoreRhosts yes
> > > # Uncomment if you don't trust ~/.ssh/known_hosts for
> > > RhostsRSAAuthentication
> > > #IgnoreUserKnownHosts yes
> > > StrictModes yes
> > > X11Forwarding yes
> > > X11DisplayOffset 10
> > > PrintMotd yes
> > > #PrintLastLog no
> > > KeepAlive yes
> > >
> > > # Logging
> > > SyslogFacility AUTHPRIV
> > > LogLevel INFO
> > > #obsoletes QuietMode and FascistLogging
> > >
> > > RhostsAuthentication no
> > > #
> > > # 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
> > > #
> > > RSAAuthentication yes
> > >
> > > # To disable tunneled clear text passwords, change to no here!
> > > PasswordAuthentication yes
> > > PermitEmptyPasswords no
> > >
> > > # Uncomment to disable s/key passwords
> > > #ChallengeResponseAuthentication no
> > >
> > > # Uncomment to enable PAM keyboard-interactive authentication
> > > # Warning: enabling this may bypass the setting of
> > > 'PasswordAuthentication'
> > > #PAMAuthenticationViaKbdInt yes
> > >
> > > # To change Kerberos options
> > > #KerberosAuthentication no
> > > #KerberosOrLocalPasswd yes
> > > #AFSTokenPassing no
> > > #KerberosTicketCleanup no
> > >
> > > # Kerberos TGT Passing does only work with the AFS kaserver
> > > #KerberosTgtPassing yes
> > >
> > > #CheckMail yes
> > > #UseLogin no
> > >
> > > #MaxStartups 10:30:60
> > > #Banner /etc/issue.net
> > > #ReverseMappingCheck yes
> > >
> > > Subsystem       sftp    /usr/libexec/openssh/sftp-server
> > >
> > > cat /etc/pam.d/sshd
> > > #%PAM-1.0
> > > auth       required     /lib/security/pam_stack.so service=system-auth
> > > auth       required     /lib/security/pam_nologin.so
> > > account    required     /lib/security/pam_stack.so service=system-auth
> >
> > > password   required     /lib/security/pam_stack.so service=system-auth
> > > session    required     /lib/security/pam_stack.so service=system-auth
> > > session    required     /lib/security/pam_limits.so
> > > session    optional     /lib/security/pam_console.so
> > >
> > >
> > >
> > > The issue is only on the Redhat 7.2 systems, and other systems with
> > newer
> > > releases are connecting fine.
> > >
> > > cat /etc/issue
> > > Red Hat Linux release 7.2 (Enigma)
> > > Kernel \r on an \m
> > >
> > >
> > > Is there any modification needed for older releases to work with newer
> > > nis?
> > >
> > > Thanks,
> > > --W
> > Does the user exist?
> > # id username
> >
> >
>