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Configuring LDAP Authentication


Managing users and their access to Splunk collected logs is very important aspect of access control to avoid unauthorized access to sensitive data/logs.

You can add users to Splunk by using following three methods. Most commonly used approach is LDAP or commonly called AD authentication.

As in any Enterprise Active Directory is used for user management.

We can use existing AD configuration to add and manage/update users in Splunk

Authentication methods supported by Splunk
  • Splunk built-in authentication
  • LDAP authentication (if enabled)
  • Scripted authentication (if enabled)

Prerequisites for AD authentication
  • Active Directory domain is set up.
  • Created records in DNS for ldap.example.com.
  • An Enterprise CA in our Active Directory and all our domain controllers have certificates.

Steps:
1. Logon to Splunk and then open setting click on Access Control.
2. Click on authentication method.
3. Click on LDAP and then click “Configure Splunk to use LDAP”.
4. Now you will get main LDAP strategy configuration settings page.
    Following are the main AD items that you need to enter here.
  • a. LDAP connection settings – based on connection settings Splunk will talk to AD.
             LDAP strategy name: just a name.

             You can have multiple LDAP strategies such as –
             (i) strategy one for ready only access through an AD Group mapping to Splunk roles
                  (user & power user),
             (ii) strategy two for full access through another AD Group mapping to other Splunk roles
                   (Admin, Splunk-system-role) or similar.
                   Default Splunk roles are – admin, can_delete, power, splunk-system-role, user.
                   Port number : 389 (this is AD LDAP default)

         Connection order: default

    Bind DN: cn= AcctName Splunk,ou=yourSvcAcctOU,dc=yourDCName,dc=yourDCExtension

             This is distinguished name of your Splunk account that you created in AD. It is
             recommended you should not use default AD administrator account or your own AD login
             here. You should create a dedicate account for Splunk – no AD administrative privilege
             required on this account.

             Bind DN Password: enter the password of AD Splunk account

  • b. User Settings – Splunk will look for users in AD based on this
  User base DN: dc=yourDCName,dc=yourDCextension             
       User base filter: leave this blank or you can enter specific AD search filter here             
       User name attribute: samaccountname             
       Real name attribute: displayname             
       Group mapping attribute: dn

  • c. Group settings – Splunk will look for AD groups in AD based on this
  Group base
DN:cn=Group_Splunk_Access_Admins,ou=youGroupOUName,dc=yourDCName,dc=DCextension          
This is the AD group that been created to grant access in Splunk.
          Static member attribute : member

  • d. Dynamic group settings – optional.
  • e. Advanced settings – default is ok; however you can increase search request size limit.

5. Click on the “Save”. If entered parameters are not correct – you won’t be able to save.
6. Now you should be able to see your LDAP strategy. Make sure it is enabled.
7. To see your AD group in Splunk, click on “Map groups”.

To map Splunk role(s) to an AD group – click on “Map groups > AD Group Name >
available and selected roles”;
Also you should be able to see AD users at “Settings > Access controls >Users”. Make sure AD users are member of the Splunk group that been created on AD.

That’s all Your AD authentication is ready now and users from AD whose group mapped in splunk can login to splunk.

If you are still facing issue regarding this topic Feel free to Ask Doubts in the Comment Box Below and Don't Forget to Follow us on 👍 Social Networks, happy Splunking >😉
Configuring LDAP Authentication Reviewed by Avotrix.Author on Monday, January 28, 2019 Rating: 5

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