How to remediate ContentDownloadFailure alarms (Linux)

Products

• Carbon Black Cloud Endpoint Standard (formerly Cb Defense)
• Carbon Black Cloud Enterprise EDR (formerly Cb Threathunter)

Issue/Introduction

Provide steps for correcting issues for Linux Sensors with downloading of content manifest data from content.carbonblack.io after receiving a related Alert

Environment

• Carbon Black Cloud Console: All Versions
  • Endpoint Standard
  • Enterprise EDR
  • Audit & Remediation
  • Workload
• Carbon Black Cloud Sensor: 2.12.x.x and Higher
• Linux: All Supported Versions

Resolution

1. Check access to content.carbonblack.io from endpoint
2. Verify that any configured proxy or firewall allows outbound (endpoint to cloud) communication

   URL	Port	Direction	SSL Inspection
   content.carbonblack.io	TCP/443	Outbound	Disabled

3. Check status of Manifest downloads and ContentDownloadFailure alarms
4. If the ContentDownloadFailure alarms continue in log.txt, please open a case with Carbon Black Technical Support and provide

   Hostname
   Verification of access from step 1
   Configuration information of firewall/proxy exclusion from step 2 (along with date/time implemented)
   Firewall/proxy logs with any errors in communicating with content.carbonblack.io
   Output of step 3 above

Additional Information

There is no need to perform these steps unless directed to do so by a CB Analytics Alert in the Carbon Black Cloud Console or by a member of VMware Carbon Black Technical Support.