Nagios authentication with Active directoy

[Paul Weaver]

> >I want to authenticate my nagios with AD. i read couple of  
> document on net but no luck..any one using this method of 
> authentication please let me know i will appricate your help.
> 
> I'm assuming you mean the Nagios UI, in which case you'll 
> want to look for mod_auth_ldap and active directory.  The 
> Nagios UI is just a web page, authentication is done via your 
> web server.  Assuming Apache, then mod_auth_ldap, or 
> mod_auth_kerberos should be where you are looking.

The way we do it is thus (specifically for ubuntu, YMMV)

Install libapache2-authenntlm-perm 
# apt-get install libapache2-authenntlm-perm 

Edit your apache config thus:

% <Directory "/usr/local/nagios/sbin">
%         Include /etc/ntlm/htaccess
%         Options +ExecCGI
%         AllowOverride None
% </Directory>
% 
% Alias /nagios /usr/local/nagios/share
% <Directory "/usr/local/nagios/share">
%         Include /etc/ntlm/htaccess
% 
%         Options +ExecCGI
%         AddHandler cgi-script .cgi
% </Directory>

And finally create
/etc/ntlm/htaccess
Thus:
% PerlAuthenHandler Apache2::AuthenNTLM
% AuthType ntlm,basic
% AuthName Nagios
% require valid-user
% 
% PerlAddVar ntdomain "MYDOMAIN   dc25  dc26"
% PerlAddVar ntdomain "OTHERDOMAIN   dc25  dc26"
% PerlAddVar ntdomain "THIRDDOMAIN   dc25  dc26"
% 
% PerlSetVar defaultdomain MYDOMAIN
% PerlSetVar fallbackdomain OTHERDOMAIN
% PerlSetVar splitdomainprefix 1
% PerlSetVar ntlmdebug 0

Replance "dc25" with your local domain controller, "dc26" with a backup
one, MYDOMAIN with your main domain, OTHERDOMAIN, THIRDDOMAIN, etc with
any other domains 


This does the AD authentication, and also allows machines to use
transparent passthrough authentication.

Each user will need a nagios account, unless you have a
default_user_name in your cgi.cfg (We do this)

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