[rt-users] Please help with RT::Authen::ExternalAuth with nested LDAP/AD groups

Landon Stewart lstewart at internap.com
Thu Jul 14 15:19:18 EDT 2016


Hello,

I have a working mod_authnz_ldap configuration for apache 2.4 (on a virtualhost on the same server) but I cannot seem to convert the configuration to a valid RT::Authen::ExternalAuth::LDAP configuration.  At one point I could see in var/log/rt.log that it was at least checking the nested groups for membership but the filter didn't look quite right.  I have since changed that configuration and it seems to stall for a minute and then fail.  It gets my real name from the AD service but then cannot match the sub/nested group filter I think?

The apache configuration that works is:
    <Location /adirectoryname>
        LogLevel debug
        AuthName "Password protected. Enter your AD username and password."
        AuthType Basic
        AuthBasicProvider ldap
        AuthLDAPURL "ldap://ldap.server.hostname/OU=iweb,DC=corp,DC=iweb,DC=com?sAMAccountName?sub?(objectClass=*)"
        AuthLDAPGroupAttribute member
        AuthLDAPGroupAttributeIsDN on
        AuthLDAPBindDN "ldapbinduserstring"
        AuthLDAPBindPassword ldapbindpass
    Require ldap-filter memberOf:1.2.840.113556.1.4.1941:=CN=RTIR_WEB_SC_ACCESS,OU=Groupes,OU=iWeb,DC=corp,DC=iweb,DC=com
    </Location>


So far I've got this in RT_SiteConfig.pm for RT:
...snipped...
Set($ExternalSettings, {
    'My_LDAP' => {
        'type' => 'ldap',
        'server' => 'corp.iweb.com<http://corp.iweb.com>',
        'user' => 'ldapbinduserstring',
        'pass' => 'ldapbindpass',
        'base' => 'OU=iweb,DC=corp,DC=iweb,DC=com',
        'filter' => '(objectClass=*)',
        'd_filter' => 'UserAccountControl:1.2.840.113556.1.4.803:=2',
        'group' => 'RTIR_WEB_SC_ACCESS',
        'group_scope' => 'sub',
        'group_attr' => 'memberOf:1.2.840.113556.1.4.1941:=CN=RTIR_WEB_SC_ACCESS',
        'group_attr_value' => 'OU=Groupes,OU=iWeb,DC=corp,DC=iweb,DC=com',
        'tls' => 0,
        'attr_match_list' => [
            'Name',
            'EmailAddress',
        ],
        'attr_map' => {
            'Name' => 'sAMAccountName',
            'EmailAddress' => 'mail',
            'Organization' => 'physicalDeliveryOfficeName',
            'RealName' => 'cn',
            'ExternalAuthId' => 'sAMAccountName',
            'Gecos' => 'sAMAccountName',
        },
    },
} );
...snipped...
Plugin('RT::IR', 'RT::Authen::ExternalAuth');

The log entries with the above configuration are:
[28280] [Thu Jul 14 19:12:14 2016] [debug]: Attempting to use external auth service: My_LDAP (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm:424)
[28280] [Thu Jul 14 19:12:14 2016] [debug]: Calling UserExists with $username (lstewart) and $service (My_LDAP) (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm:465)
[28280] [Thu Jul 14 19:12:14 2016] [debug]: UserExists params:
username: lstewart , service: My_LDAP (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:439)
[28280] [Thu Jul 14 19:12:14 2016] [debug]: LDAP Search ===  Base: OU=iweb,DC=corp,DC=iweb,DC=com == Filter: (&(objectClass=*)(sAMAccountName=lstewart)) == Attrs: sAMAccountName,physicalDeliveryOfficeName,mail,cn,sAMAccountName,sAMAccountName (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:469)
[28280] [Thu Jul 14 19:12:14 2016] [debug]: Password validation required for service - Executing... (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm:517)
[28280] [Thu Jul 14 19:12:14 2016] [debug]: Trying external auth service: My_LDAP (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:153)
[28280] [Thu Jul 14 19:14:14 2016] [debug]: LDAP Search ===  Base: OU=iweb,DC=corp,DC=iweb,DC=com == Filter: (&(sAMAccountName=lstewart)(objectClass=*)) == Attrs: dn,OU=Groupes,OU=iWeb,DC=corp,DC=iweb,DC=com (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:186)
[28280] [Thu Jul 14 19:14:14 2016] [debug]: Found LDAP DN: CN=Landon Stewart,OU=Utilisateurs,OU=iWeb,DC=corp,DC=iweb,DC=com (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:220)
[28280] [Thu Jul 14 19:14:15 2016] [debug]: Attribute 'OU=Groupes,OU=iWeb,DC=corp,DC=iweb,DC=com' has no value; falling back to 'CN=Landon Stewart,OU=Utilisateurs,OU=iWeb,DC=corp,DC=iweb,DC=com' (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:249)
[28280] [Thu Jul 14 19:14:15 2016] [debug]: LDAP Search ===  Base: RTIR_WEB_SC_ACCESS == Scope: sub == Filter: (memberOf:1.2.840.113556.1.4.1941:=CN=RTIR_WEB_SC_ACCESS=CN=Landon Stewart,OU=Utilisateurs,OU=iWeb,DC=corp,DC=iweb,DC=com) == Attrs: dn (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:256)
[28280] [Thu Jul 14 19:14:15 2016] [critical]: Search for (memberOf:1.2.840.113556.1.4.1941:=CN=RTIR_WEB_SC_ACCESS=CN=Landon Stewart,OU=Utilisateurs,OU=iWeb,DC=corp,DC=iweb,DC=com) failed: LDAP_INVALID_DN_SYNTAX 34 (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm:274)
[28280] [Thu Jul 14 19:14:15 2016] [debug]: LDAP password validation result: 0 (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm:696)
[28280] [Thu Jul 14 19:14:15 2016] [debug]: Password Validation Check Result:  0 (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm:521)
[28280] [Thu Jul 14 19:14:15 2016] [debug]: Autohandler called ExternalAuth. Response: (0, Password Invalid) (/opt/rt4/local/plugins/RT-Authen-ExternalAuth/html/Elements/DoAuth:11)
[28280] [Thu Jul 14 19:14:15 2016] [error]: FAILED LOGIN for lstewart from xx.xx.xx.xx (/opt/rt4/sbin/../lib/RT/Interface/Web.pm:810)


--
Landon Stewart
Lead Analyst - Abuse and Security Management
INTERNAP ®
lstewart at internap.com<mailto:lstewart at internap.com> • www.internap.com<http://www.internap.com>

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