[ZendTo] MS LDAPs

Scott Silva ssilva at sgvwater.com
Fri Feb 14 16:54:25 GMT 2020 

OK… I think I figured this out…

Run       openssl s_client -connect your-AD-server-here.example.com:636  (fixed to your AD server)

In the results you will see a full key in base 64

Copy all from the  ----BEGIN Certificate --- to the ---END CERTIFICATE--- including those lines and paste to the end of whichever cert your TLS_CACERT points to

Don't overwrite, paste to the end and save.
Now try and see if it authenticates...

Works in mine





From: ZendTo <zendto-bounces at zend.to> On Behalf Of Glenn Noel via ZendTo
Sent: Thursday, February 13, 2020 2:24 PM
To: ZendTo Users <zendto at zend.to>
Cc: Glenn Noel <glenn.noel at gmail.com>
Subject: Re: [ZendTo] MS LDAPs

Hi All,  I'm still struggling with LDAPS.  In Jules' previous email there is a mention of: 

"If you are using some sort of a self-signed or locally-signed certificate on your AD server(s), then you will need to add your local root CA public cert to the TLS_CACERT file, or else the ZendTo server won't be able to verify the cert it gets from the AD server. But if you are using a "normal" externally-signed commercial cert, it should work fine." 

I am in this situation of using a cert created by my internal Domain CA.  The steps I have taken:
1.) Exported the public key/cert for Client Authentication, Server Authentication from my Windows Domain Controller in DER encoded binary X.509(.CER) format
2.) copied this .CER to /etc/ssl/certs
3.) in /etc/ldap/ldap.conf  I added:
TLS_CACERT     /etc/ssl/certs/my-exported-ldaps-cert.cer 
This line sits under the original line of TLS_CACERT     /etc/ssl/certs/ca-certificates.crt

It was a shot in the dark and I successfully predicted that it would not work.  However I am stuck.  If anyone has a good step-by-step to help me out I would appreciate it immensely.

If the recommended method is to purchase a 3rd party cert please let me know - I will try that next (although I might need some assistance with that process too).

Thank you,

Glenn
  

On Wed, Feb 12, 2020 at 10:24 AM Jules Field via ZendTo <mailto:zendto at zend.to> wrote:
Scott,

I have just done a CentOS 7 install of the latest ZendTo beta from scratch, including using SELinux.

I set the preferences.php settings to

    authLDAPServers1 => array('ldaps://our-AD-server.soton.ac.uk'),
    authLDAPBaseDN1 => 'DC=soton,DC=ac,DC=uk',
    authLDAPAccountSuffix1 => '@http://soton.ac.uk',
    authLDAPUseSSL1 => false,
    authLDAPUseTLS1 => false,

and it just worked immediately. I didn't have to install any other packages at all.

Our AD servers are listening on 636/tcp (the TCP port for ldaps according to /etc/services).

I have already tested the same thing on Ubuntu 18.04 and it worked first time there too.

If you are using some sort of a self-signed or locally-signed certificate on your AD server(s), then you will need to add your local root CA public cert to the TLS_CACERT file, or else the ZendTo server won't be able to verify the cert it gets from the AD server. But if you are using a "normal" externally-signed commercial cert, it should work fine.

On 10/02/2020 18:39, Scott Silva via ZendTo wrote:
In my case I know the ports are open because I have a Linux based spam filter that is able to auth secured.


-----Original Message-----
From: ZendTo mailto:zendto-bounces at zend.to On Behalf Of Guy Bertrand via ZendTo
Sent: Monday, February 10, 2020 10:37 AM
To: mailto:zendto at zend.to
Cc: Guy Bertrand mailto:Guy.Bertrand at exelaonline.com
Subject: [ZendTo] MS LDAPs

Reminder: LDAPS would normally use port 636 instead of ldap/389 to talk to the domain controller.  Don't forget to check things between your ZendTo server and the domain controller:
- the outgoing firewall config on the ZendTo server
- the firewall on the DC (is port 636 open?)
- routing
- any intermediate firewall rules

Quick test: open a command prompt (CMD on Windows, any shell on *nix).  This will try to "telnet" to that port.
C:\> telnet "ip of your DC" 636
If a blank screen appears then the port is open, and the test is successful.
If you receive a connecting... message or an error message then something is blocking that port.

Guy Bertrand, M.Ing
Directeur informatique / IT Manager
EXELA TECHNOLOGIES
b: +1.514.392.4999 | m: +1.514.265.9754
1155, boulevard Robert-Bourassa, suite 500 | Montréal (Québec) CANADA H3B 3A7 http://www.ExelaTech.com | EXELA LinkedIn


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Jules

-- 
Julian Field MEng CEng CITP MBCS MIEEE MACM

'A good programmer is someone who always looks both ways
 before crossing a one-way street.' - Doug Linder

http://www.Zend.To
Twitter: @JulesFM
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