Fortinet FortiGate VPN Data

The Fortinet FortiGate Add-On for Splunk is required to collect firewall logs from FortiGate servers.

Splunkbase Download: https://splunkbase.splunk.com/app/2846/

Installation Guide: https://splunkbase.splunk.com/app/2846/#/details

How to Install and Configure the FortiGate Add-on:

  1. Install the Add-on on the Heavy Forwarder.

  2. Configure the Add-on on the Heavy Forwarder.
    • Getting data into Splunk Reference.
    • Create an index named fortigate or update the macro definition in Cyences’ configuration page.
  3. Install the Add-on on the Search Head.

Note: Update the index value for VPN data macro definition in the Data Source Macros section in Cyences Configuration page.

FortiGate VPN Support and issue with action field extraction

  • Due to a field extraction issue in the Fortinet FortiGate Add-On for Splunk (field=action).

  • Verify that the FortiGate VPN data is supported by the Cyences App by following the instructions below.

How to fix the problem?

  1. From Splunk’s navigation bar, go to Settings > Data models.

  2. Search for the Authentication data model and click on it.

  3. Click Edit > Edit Acceleration.

  4. Uncheck the Acceleration box, then click Save.

  5. Under the Calculated fields section, click Edit for the action field.

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  6. Your current configuration should look similar to this:

     if(isnull(action) OR action="","unknown",action) 
    
  7. Replace the above configuration/eval expression with the contents below:

     case(sourcetype="fgt_event" AND subtype="vpn" AND vendor_action IN ("tunnel-up", "phase2-up"), "success", sourcetype="fgt_event" AND subtype="vpn" AND vendor_action="ssl-login-fail", "failure", isnull(action) OR action="", "unknown", 1==1, action) 
    
  8. Click Save.

  9. Click Edit > Edit Acceleration.

  10. Enable the Acceleration, then click Save.

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