[389-users] Greedy PAM

Gerrard Geldenhuis Gerrard.Geldenhuis at betfair.com
Tue Oct 19 09:07:52 UTC 2010

>From: 389-users-bounces at lists.fedoraproject.org [389-users-bounces at lists.fedoraproject.org] on behalf of Daniel Maher [dma+389users at witbe.net]
>Sent: 15 October 2010 16:12
>To: 389-users at lists.fedoraproject.org
>Subject: Re: [389-users] Greedy PAM
>On 10/15/2010 04:57 PM, Gerrard Geldenhuis wrote:
>> Is there a way to dynamically have search basis when queries for certain data is done.
>> How do you configure clients to be more selective when doing searches against a ldap directory.
>It depends entirely on the software doing the query.  Here's an example
>from one of my Apache HTTPd configs :

Thanks, I have addded the following filters for PAM in /etc/ldap.conf

nss_base_passwd         ou=people,dc=mycompany?sub
nss_base_group          ou=Groups,dc=mycompany?sub
nss_base_group          ou=PrivateGroups,dc=mycompany?sub
nss_base_group          ou=SystemGroups,dc=mycompany?sub

It works kind of but what I don't understand is that when a client authenticates against the directory server I see a ldapsearch request in wireshark for every single user. I am not sure if this a misconfiguration on my side or if PAM_LDAP is being greedy/lazy/buggy or where else the problem lies. I see a succesfull result for every ldap search request in LDAP so I am not sure why every user would need to be queried if only one user needs to authenticate. 

We use a seperate user to speak to the Directory specified in /etc/ldap.conf. I am not sure if that would make a difference.

binddn          uid=SysAuth,ou=Service Accounts,dc=mycompany

Any thoughts would be appreciated and suggestions for a nice tool to analyze LDAP conversations would be much appreciated. I am playing with dsniff and netsniff-ng. 

Best Regards

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