Carbon Black Cloud: Sensor install on Server 2008 machines failing network connection to backend

Products

• Carbon Black Cloud Endpoint Standard (formerly Cb Defense)

Issue/Introduction

• Sensor will not install due to network connection errors
• SSL/TLS Errors seen in install logs:
  • http: schannel: SSL/TLS connection with dev-prod05.conferdeploy.net port 443
    http: schannel: failed to receive handshake, need more data 
• Previous versions of sensors installed without issue on the server(s)

Environment

• Carbon Black Cloud Sensor: Version 3.2.1.51 and Higher
• Microsoft Windows Server 2008

Cause

Support for Microsoft Windows Server 2008 ended with the 3.1 sensor.

Resolution

Sensor will need to be downgraded back to 3.1 or earlier in order to properly register with the backend and install.

Additional Information

Microsoft Windows Server 2008 R2 is still supported as of the latest sensor. This only affects Server 2008 SP0/1/2.