Troubleshooting Certificate Issues with Ziti Router in Docker

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Overview

If your Ziti Router running in Docker is experiencing issues, it may be due to expired certificates or time synchronization problems. This article outlines how to verify the certificate status and ensure proper configuration in your Docker environment.

Prerequisites

• Access to the server/container running the Ziti Router
• openssl installed (commonly available in most Linux containers)
• Access to your docker-compose.yml file

Step-by-Step Troubleshooting 

1. Check System Time Synchronization

Certificates are sensitive to time differences. Ensure the system time is accurate and synchronized with a reliable time source.

On Linux, you can check the current time using:

bash
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date

If the time is not in sync, consider using ntp or chrony for automatic time updates.

2. Verify Certificate Expiry

To check if the certificate is valid and not expired, run the following command inside the container or on the host where the file is accessible:

bash
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sudo openssl x509 -noout -text -in ziti_router/certs/cert.pem | grep "Not After"

Example Output:

yaml
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Not After : Feb 27 20:20:08 2026 GMT

If the date shown is in the past, the certificate has expired and must be renewed.

3. Validate Docker Volume Mapping

Ensure your Docker container has access to the certificate path by checking the volume mappings in your docker-compose.yml.

Example Configuration:

yaml
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volumes:
  - ./ziti_router:/etc/netfoundry

This line maps the local ./ziti_router directory to /etc/netfoundry in the container, allowing access to certificates and config files.