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Spotlight
PAGE: https://alison.com/course/exploring-and-installing-let-s-encrypt-using-ssl-certificate
PROMISE: Gains a clear map of SSL automation and renewal workflows for ACME-based certificate lifecycles.
WHO: System administrators managing web servers who need to bridge the gap between ACME issuance and service reloads.
WHYNOW: The shift to shorter certificate lifetimes requires moving from manual installs to automated reload workflows to avoid expiration.
DESC: Learn about the importance of SSL certificates, the process of installation and renewal as well as how to configure it in the cloud computing environment.
BEFORE: Relies on manual calendar reminders for certificate expiry.
BEFORE: Web server requires a full restart after each update, causing downtime.
BEFORE: Lacks a verification step to confirm the new cert is live.
AFTER: Understands the criticality of automated renewal cycles.
AFTER: Uses scheduled tasks to reload services without manual intervention.
AFTER: Verifies certificate status via external tools after each update.
GAIN: A conceptual framework for why certificate renewal is a security priority.
GAIN: Practical knowledge of using cron jobs to automate certificate reloading.
GAIN: The ability to validate installed certificates using independent verification tools.
STEP: You check the server and find the certificate will expire in 64 days with no auto-renewal trigger. || State the importance of renewing SSL certificates || Configures a schedule or hook that checks certificate validity before the 64-day limit hits to prevent service interruption.
STEP: The ACME client issues a new cert, but the web server still serves the old key and fails ARI requests. || Explain the steps involved in installing cron job || Sets up a scheduled task to restart or reload the web service immediately after the ACME renewal script completes.
STEP: You cannot confirm if the newly installed certificate is actually serving the correct chain to visitors. || Explain how to verify the status of an SSL certificate on SSL Labs website || Runs a diagnostic check to confirm the public endpoint is serving the new certificate before closing the maintenance window.
NOTFOR: Developers looking for code samples to build a custom ACME client from scratch.
NOTFOR: Teams that already have fully automated certificate management pipelines in place.
FACT: Average duration: 4-5 Hours (Contains Video)
FACT: CPD-accredited certificate available
FACT: Advanced level
COVERS: Compare traditional and SSL certificates
COVERS: Identify the different types of SSL certificates
COVERS: Explain how SSL works
COVERS: Outline the steps involved in obtaining an SSL certificate
COVERS: Outline the process of configuring servers
COVERS: Discuss how to create droplets
COVERS: State how to use a console to administer a new server
COVERS: Explain how to verify the status of an SSL certificate on SSL Labs website
COVERS: State the importance of renewing SSL certificates
COVERS: Explain the steps involved in installing cron job
COVERS: Web Development
MODULE: Introduction to SSL Certificates || SSL Certificates | Types of SSL Certificates | Using Let’s Encrypt
MODULE: Creating Droplets || Preparation Steps | Creating Droplets | Configuring a Virtual Machine
MODULE: Installing Let’s Encrypt || SSL Labs Website | The Base Domain | Renewing SSL Certificates
What you are probably seeing
You notice your current ACME client does not expose ARI endpoints or fails to schedule automatic renewal requests triggered by the authority.
Your deployment scripts rely on static timer values or assume certificates last for 90 days, creating a gap between renewal and service restart.
Why it happens
Let’s Encrypt is moving to a 64-day lifetime and using the ARI specification to tell clients when to renew, rather than waiting for a fixed calendar date.
Clients without ARI support cannot read the authoritative renewal instruction, causing hard-coded durations to fail or miss the narrow window for valid certificate issuance.
What changed recently
Step by step
1. Check your ACME client documentation to confirm it implements the ACME Renewal Information extension.
2. Ensure your automation script parses the Ari-renewal-attribute from the certificate’s CRL or issuance data.
3. Test your certificate reload trigger by manually restarting the service or reloading the config without full downtime.
4. Update your deployment workflow so that the renewal process and the service restart happen in a single atomic transaction.
5. Run a scheduled task that checks the ARI hint daily and initiates the renewal workflow when the date passes.
Ways to go further
Start here: Exploring and Installing Let’s Encrypt Using SSL Certificate Open the free course on Alison ↗
Affiliate links: CHEAPUNO may earn a commission if you buy through them, at no extra cost to you.
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