Re: "Authentication failure" on Ubuntu 18.04...
On Sat, 30 Mar 2019 16:44:31 -0400 (EDT)
Robert Heller <heller(a)deepsoft.com> wrote:
I have a server running CentOS 6 on the bare metal, running the
stock
CentOS 6 OpenLDAP packages (openldap-2.4.40-16.el6.x86_64,
openldap-clients-2.4.40-16.el6.x86_64, openldap-2.4.40-16.el6.i686,
openldap-servers-2.4.40-16.el6.x86_64) [yes I know these are old, but
they *work* -- "If it ain't broke, don't fix it."]. There are two VMs
running on this server, one running Ubuntu 14.04 and the other Ubuntu
18.04. (These two VMs are/will be servers for DRBL.) The Ubuntu 14.04
VM (and all of its diskless clients) are perfectly happy to talk to
the OpenLDAP server (slapd) running on the CentOS 6 machine. The
Ubuntu 18.04 VM is not. ldapsearch works everywhere though, so it is
NOT the server or the core ldap libraries on any of the machines
(partitularly the Ubuntu 18.04 VM). I can only assume that there is
something fishy with nslcd or the pam/ldap libraries or config on the
Ubuntu 18.04 VM. I have checked everything, but I am coming up
empty. I am thinking there might be some "trick" to getting LDAP
Authentication to work under Ubuntu 18.04 that I am missing.
I have many Bionic systems running nslcd without any problems. I
don't think that it is nslcd that is the problem.
When you are debugging you should turn of nscd. It just gets in
the way. If it were me I would make sure that stats logging is on
on the LDAP server. Then I would watch the LDAP server log as I
attemptes a login on the 18.04 system.
Bill