EDR: Sensors not Connecting to Server

Products

• Carbon Black EDR (formerly Cb Response)

Issue/Introduction

• EDR Sensor installed on Ubuntu machine does not connect to Server. 
• 'No route to host' message received when testing to register/checkin Sensor with curl:

a. curl -k "https://<ip_of_EDR_server>:443/sensor/register"
b. curl -k "https://<ip_of_EDR_server>:443/sensor/checkin"

Example:
curl -k "https://123.45.6.789:443/sensor/register"
Failed to connect to 123.45.6.789 port 443: No route to host

curl -k "https://123.45.6.789:443/sensor/checkin"
Failed to connect to 123.45.6.789 port 443: No route to host

Environment

• EDR Sensor: All Versions
• Linux: All Supported Versions

Cause

Routing issue between internal subnets that connect to EDR Server.

Resolution

Fix routing issue with subnets.