MOODLE: Authentication Issue- CAS Login

Case: After Setting CAS & LDAP in Moodle, Admin/ local user cannot login anymore to Moodle.

Solution Step:
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1. Go to database server.
2. Check setting in table mdl_config_plugins. Compare with existing running moodle db.
    #  SELECT * FROM mdl_config_plugins WHERE PLUGIN LIKE '%auth/cas%'


3. Change manually, db setting for mdl_config.
    #  UPDATE mdl_config SET VALUE = 'manual'  WHERE id='3'; 


4. Try open the site again and click Login.
    The local user may login now. But CAS user cannot.
    Login as moodle admin.

5. Go to CAS Setting Location:
    Settings > Site administration > Plugins > Authentication > Manage authentication

    ** Compare the setting with running moodle site.
        Found problem: cn dn setting in distinguish field.
        CAS   -  Need to put cn dn setting in Context field.
        LDAP -  Put cn dn setting in distinguish field.


6. Fix cn dn setting in CAS and LDAP.
    Settings > Site administration > Plugins > Authentication > Manage authentication

   * Save setting for both.


7. Test open the site again and click Login.
    Now the login page back to normal. User can choose either to login using CAS or other user.

   * Thanks to Sis. Azlinda for the fast investigation & solution has been taken. Caiyok!!


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