further troubleshooting on my part with ldapsearch/debugging turned up, gave me the following:

TLS: certdb config: configDir='/etc/openldap/certs' tokenDescription='ldap(0)' certPrefix=" keyPrefix=" flags=readOnly
TLS: using moznss security dire /etc/openldap/certs prefix
TLS: error: tlsm_PR_Recv returned 0 - error 21:Is a directory
TLS: error: connect - force handshake failure: errono 21 - moznss error -5938
TLS: can't connect: TLS error -5938:Encountered end of file
ldap_sasl_bin(SIMPLE): Can't contact LDAP server (-1)

searches I;ve done on this error seem to point to certificate/openSSL problems.

Anyone run into this before?

On Friday, January 24, 2014 5:39 PM, c chupela <cnctema68@yahoo.com> wrote:
After having some packet traces done, what was revealed is that from a windows client running the softerra ldap browser, we could see the connection be established between client and server (syn, ack synack) client requests sending of data, and server resets/closes the connection, never sending any data,  as I also saw with attempting to telnet to port 636 - connection is closed by remote host.

Regarding the question of is TLS enabled, if I understand the doc correctly, the answer is yes.  With respect to the TLS_REQCERT never statement, I believe it was set this way because this was only intended to be a testing server. 

contents of ldap.conf:

# LDAP Defaults

# See ldap.conf(5) for details
# This file should be world readable but not world writable.

BASE    dc=plandb,dc=stuff,dc=acme,dc=com
URI     ldap://plandb-qa.stuff.acme.com ldaps://plandb-qa.stuff.acme.com:636

#SIZELIMIT      12
#TIMELIMIT      15
#DEREF          never

TLS_CACERTDIR   /etc/openldap/certs
TLS_REQCERT     never

currently running slapd process:

1 S ldap      5603     1  0  80   0 - 111440 futex_ Jan21 ?       00:00:02 /usr/sbin/slapd -h  ldap:/// ldaps:/// ldapi:/// -u ldap

On Thursday, January 23, 2014 3:25 AM, Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de> wrote:
>>> c chupela <cnctema68@yahoo.com> schrieb am 22.01.2014 um 18:43 in Nachricht
> I've been tasked with figuring out why a redhat 6.4 server w/openldap v2.4.23
> is not accessible.
> This server is a test server. I have a production server that is working
> properly, and I've gone thru and compared config files, etc, but haven't
> found any differences.
>  I'm a newbie with this, so my understanding is still somewhat limited. 
> Here's what I've done or checked so far:
> - iptables is not running
> - if I run netstat, I can see port 389/port 636 in listening state:
> tcp        0      0      *                 
> LISTEN      5603/slapd
> tcp        0      0      *                 
> LISTEN      5603/slapd
> tcp        0      0 :::636                      :::*                       
> LISTEN      5603/slapd
> tcp        0      0 :::389                      :::*                       
> LISTEN      5603/slapd
> I can telnet to port 389 on this server from another server, but not to port
> 636 - putty will throw back an immediate 'connection closed by remote host'
> message.
> I'm not seeing any slapd related messages in /var/log/messages.
> What else can I check on here?


> Thanks
> Chris