[Fedora-directory-users] Unable to SSL with Windows Sync Agreement

Thu Aug 7 13:02:41 UTC 2008

Mathisj,

If I'm not mistaking, in order for the two servers to be able to talk with each other, they need to have certificates signed by Certificate Authorities recognized by the two servers (meaning, the certificates of these root CAs must be installed on the two servers). Even more straightforward is to generate certificate requests for both servers and get them signed by the same root CA.

--- On Thu, 7/31/08, Groot, Mathijs de (IDT Competence Java) <math.de.groot at logica.com> wrote:
From: Groot, Mathijs de (IDT Competence Java) <math.de.groot at logica.com>
Subject: [Fedora-directory-users] Unable to SSL with Windows Sync Agreement
To: fedora-directory-users at redhat.com
Date: Thursday, July 31, 2008, 12:18 PM

Hello everyone, 

I can use some help with setting up the Windows Sync. 

Ill give some context first, im trying to sync user, groups
and passwords from a Windows 2003 server with Active Directory with a Red Hat
enterprise 5, Red Hat Directory Server 8.0. 

It is a test environment with where I can access and
configure the servers easily. 

But ive got some problems setting a new Windows Sync
Agreement. 

It comes down to the following: 

I can’t get an SSL connection  with the a new  Windows
Sync Agreement, from the Red Hat DS to the Windows AD server. 

In the Windows Sync Server info screen I get the following
message when clicking on next:   

"unable to contact Active Directory server,
continue" 

(Windows Sync Server info screen located In the Directory
Server Console ->  Configuration tab ->  Replication -> userRoot ->
highlight the database -> Object -> New Windows Sync Agreement -> The
second screen reads Windows Sync Server Info) 

But when I uncheck the checkbox “Using encrypted SSL
connection” the connection works and the Windows AD server is reached. 

So this concludes (and ive tested) that the Windows Server
and domain is reachable and the Bind DN is valid, and entered values are
correct. 

The SSL connection seems to be setup correctly, the checks
(ldapsearch query) described by the fedora manual outputs the correct result.
Following: 

“ 

http://directory.fedoraproject.org/wiki/Howto:WindowsSync

Testing your Configuration 

Test to make sure you can talk SSL from Fedora Directory to
AD 

This is how you test to verify that the Windows side SSL is
enabled properly: 

ldapsearch -Z -P <RHDS-cert8.db> -h <AD/NT
Hostname> -p <AD SSL port> -D "<sync manager user>”
-w < sync manager password> -s <scope> -b "<AD
base>" "<filter>" 

“ 

My ldapsearch query: 

/usr/lib64/mozldap/dapsearch -Z -P
/etc/dirsrv/slapd-<instance>/cert8.db -h compute.domain.com -p 636 -D
"CN=Administrator,CN=Users,DC=domain,DC=com"  -w <pwd> -s base
-b "dc=domain,dc=com" "objectclass=top" 

But strangely enough there is not network traffic at all
when the SSL  connection is checked! 

(when clicking on next and the message "unable to
contact Active Directory server, continue" appears) 

Ive done the following actions to make to monitor it: 

First I’ve disabled SELinux, in case that blocks
something (just for testing). 

watch the tcp ip traffic with: 

tcpdump -nn -p port not ssh and ip host <Red Hat IP
number> 

Here I can see that, when I don’t use the SSL
connection, there is traffic towards my Widows AD, but when ive check the SSL
option, there is no traffic at all, nothing. 

As well when I look at the iptables: 

added an extra line: iptables -I OUTPUT  1 -d <Windows AD
IP number> -j ACCEPT  

watch -d iptables -L –nv 

I see the same result, traffic when I don’t use the
SSL option and no traffic at all when the SSL option is checked. 

How can I get the message "unable to contact Active
Directory server, continue" when there is no outgoing request from my Red
Hat server. 

Ive made certificates at both sides (Windows and Red Hat)
and exported and imported these certificated to the other server. 

Please advice on following steps I can take, what the
problem can be and how it is possible that there is no traffic at all. 

Thanks in advanced. 

Matt 

Mathijs
A. de Groot

Consultant - Software Engineer

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