# Sensor troubleshooting

## Check the sensor's status in CertCentral

When a sensor isn't working, the first place to go is the Manage sensor page and check the status of the sensor. In the sidebar menu, click Discovery > Manage Discovery. On the Scan page, click Manage sensor.

## Check for network issues

If everything checks out on the Manage sensor page, check for network issues:

## Sensor diagnostic tool

Each sensor has a diagnostic tool to check for connectivity to the URLs configure in the license properties file.

### Linux

Go to the installation directory and run ./diag.sh to check connectivity to the URLs configured in the license.properties file. Make sure you have root or administrative permissions to the server where the sensor is installed.

### Windows

Go to the installation directory and run diag.bat to check connectivity to the URLs configured in the license.properties file. Make sure you have administrative permissions to the server where the sensor is installed.

## Get a copy of the sensor log

If you still haven't found the problem, check the sensor log. You need a copy of the sensor log to share withDigiCert support if you end up needing help.

The sensor logs are located in the logs directory: '<install_dir>/logs'. The sensor.log file is the most recent log.