[nssldap] Re: allowing root login at console when ldap is down

[Patrick Wolfe <pwolfe [at] employease.com>]

sorry for the repeated discussion.  I sent this to the mailing list 
MONTHS ago.  Just got it now.  Not sure why.  I've added 
"nss_initgroups_ignoreusers root,ldap,informix" and things seem to be 
better now.

Thanks anyway

Patrick Wolfe wrote:
> I'm sure someone has solved this before.
>
> We're using nss_ldap and pam_ldap with openldap servers on CentOS 4 and 
> FreeBSD 6.  Everything is working fine, as long as connectivity to the 
> openldap servers is working.  Occationally, something will go wrong, a 
> network change, or changing what net a host is connected to, and ldap 
> connectivity is broken.
>
> The problem is, nobody can login when ldap isn't working, even root 
> (which is a local account).  I'm thinking it probably is the order of 
> items in my /etc/pam.d/system-auth file.  Here is what I have for our 
> CentOS systems:
>
> auth        required      /lib/security/$ISA/pam_env.so
> auth        sufficient    /lib/security/$ISA/pam_unix.so likeauth nullok
> auth        sufficient    /lib/security/$ISA/pam_ldap.so use_first_pass
> auth        required      /lib/security/$ISA/pam_deny.so
>
> account     requisite     /lib/security/$ISA/pam_access.so
> account     required      /lib/security/$ISA/pam_unix.so broken_shadow
> account     sufficient    /lib/security/$ISA/pam_localuser.so
> account     sufficient    /lib/security/$ISA/pam_succeed_if.so uid < 100 
> quiet
> account     [default=bad success=ok user_unknown=ignore] 
> /lib/security/$ISA/pam_ldap.so
> account     required      /lib/security/$ISA/pam_permit.so
>
> password    requisite     /lib/security/$ISA/pam_cracklib.so retry=3 
> minlen=11 difok=4
> password    sufficient    /lib/security/$ISA/pam_unix.so nullok 
> use_authtok md5 shadow
> password    sufficient    /lib/security/$ISA/pam_ldap.so use_authtok
> password    required      /lib/security/$ISA/pam_deny.so
>
> session     required      /lib/security/$ISA/pam_limits.so
> session     required      /lib/security/$ISA/pam_unix.so
> session     optional      /lib/security/$ISA/pam_ldap.so