Template - SSL Expiry Alert System

Target Audience

• IT Administrators: Responsible for managing multiple websites and ensuring their security.
• Webmasters: Individuals managing web properties who need to ensure SSL certificates are valid and up to date.
• DevOps Engineers: Professionals focusing on the operational stability of web applications, requiring monitoring of SSL certificates.
• Security Analysts: Individuals tasked with maintaining the security posture of web services, needing alerts for SSL certificate issues.

Problem Solved

SSL certificates are critical for secure communication online. However, they can expire, leading to significant security risks and potential service disruptions. This workflow automates the monitoring of SSL certificates, ensuring administrators are alerted well in advance of expiry dates. It addresses:

• Expired Certificates: Prevents service outages due to expired SSL certificates.
• Security Risks: Reduces vulnerabilities associated with invalid SSL certificates.
• Proactive Management: Allows for timely renewal of certificates, maintaining trust and security for users.

Workflow Steps

1. Weekly Trigger: The workflow is triggered weekly to check the status of SSL certificates.
2. Fetch URLs: It retrieves a list of URLs to monitor from a Google Sheet, ensuring up-to-date information.
3. Check SSL: Each URL is checked using the SSL-Checker.io API, which returns details about the certificate status, including:
   • Validity Period
   • Days Remaining Until Expiry
   • Certificate Status
4. Classification: The results are categorized into:
   • Invalid: Certificate is not valid.
   • Warning: Expires in less than 30 days.
   • Notice: Expires in less than 60 days.
   • Info: All other statuses.
5. Alerts: Based on the classification, appropriate email alerts are sent to designated recipients, ensuring timely action can be taken. Notifications may also be sent via Telegram and Ntfy for immediate awareness.