CB Protection: Error: Invalid file dsn ''

Products

• Carbon Black App Control (formerly Cb Protection)

Issue/Introduction

• Error accessing the console:
  • Network error while trying to communicate with Cb Protection Server Error: Could not connect to host 
• Serverlog.bt9 shows error: Connection attempt failed: General error: Invalid file dsn ''

Environment

• CB Protection Server: All Supported Versions

Cause

• Agent Cache Corruption
• CB Protection server service is unable to to access C:\Program Files (x86)\Bit9\Parity Server\shepherd.dsn
• Process Injection from another application

Resolution

1. Confirm the service account used for the CB Protection server service has access to C:\Program Files (x86)\Bit9\Parity Server\shepherd.dsn
2. Stop the CB Protection agent:
   • https://community.carbonblack.com/t5/Knowledge-Base/CB-Protection-How-to-Stop-Start-the-Agent-Windows/ta-p/65477
3. If issue stops, clear corrupted cache:
   • https://community.carbonblack.com/t5/Knowledge-Base/Cb-Protection-Agent-Cache-Corruption/ta-p/44126
4. If issue still persists, capture a procmon and contact CB Support.
   • https://community.carbonblack.com/t5/Knowledge-Base/How-to-Collect-a-low-Altitude-Procmon-Capture/ta-p/44890