Well, it seems to be getting a “trend” for me, to integrate stuff into our Active Directory. Now that I know why, and how easy that is, I expect to add more stuff. The good thing about the integration is, that you only need to maintain a single source for authorization.
The bad thing about that is, that stuff becomes dependent on the Active Directory (we do have four domain controllers, so that should be fine).
Now, here’s the ssl-(only) apache2 configuration file for my vhost:
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<VirtualHost *:80> ## mod_core DocumentRoot "/usr/share/nagios" ServerName nagios.barfoo.org ServerAlias nagios3.barfoo.org ServerAdmin nagiosadmin@barfoo.org ## mod_rewrite RewriteEngine On RewriteRule ^/(.*) https://nagios.barfoo.org/$1 [L,R] </VirtualHost> <VirtualHost *:443> ## mod_core DocumentRoot "/usr/share/nagios" ServerName nagios.barfoo.org ServerAdmin nagiosadmin@barfoo.org ScriptAlias /nagios/cgi-bin /usr/lib/nagios/cgi Alias /nagios /usr/share/nagios Alias /pnp /usr/share/nagios/html/pnp4nagios <DirectoryMatch "/usr/(share/nagios|lib/nagios/cgi)"> AllowOverride None Order deny,allow Deny from all Allow from 10.0.0. Options None # Authorization AuthType Basic AuthName "Nagios Barfoo" # The authentification provider is mod_ldap AuthBasicProvider ldap # mod_ldap is our *only* authentification provider for this! AuthzLDAPAuthoritative on # Redirect the userfile requests to /dev/null AuthUserFile /dev/null # AD requires an authentication DN to access any records AuthLDAPBindDN "BARFOO\ldap_nagios" AuthLDAPBindPassword "somethingrandom" # The URL to search in AuthLDAPURL "ldap://dc0.barfoo.org dc1.barfoo.org dc2.barfoo.org dc3.barfoo.org/OU=Users,dc=barfoo,dc=org?sAMAccountName?sub?(objectClass=*)" # Search the group membership in the specified group, otherwise it's gonna # get searched at the binding DN's location AuthLDAPGroupAttributeIsDN on Require ldap-group CN=gr_nagios,OU=Groups,DC=barfoo,DC=org </DirectoryMatch> ## mod_log ErrorLog /var/log/apache2/nagios.barfoo.org.error_log TransferLog /var/log/apache2/nagios.barfoo.org.access_log CustomLog /var/log/apache2/nagios.barfoo.org.ssl_request_log ssl_combined ## mod_ssl SSLEngine on SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL SSLCertificateFile /etc/apache2/ssl.crt/nagios.barfoo.org.crt SSLCertificateKeyFile /etc/apache2/ssl.key/nagios.barfoo.org.key <Files ~ ".(cgi|shtml|phtml|php3|php?)$"> SSLOptions +StdEnvVars </Files> SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown downgrade-1.0 force-response-1.0 </VirtualHost> |
As you can see, AuthLDAPUrl holds the four LDAP servers separated by spaces (that’s what the Apache2 documentation says about that), and that actually works.
The only additional thing I had to change from the nagios part is in /etc/nagios/cgi.cfg to allow everyone to issue system commands. Also, if you ever stumble upon extraneous chars in the check_nrpe output, update to a newer NRPE version, that fixed it for me (that is on the receiver side – as in the box running the NRPE agent).