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Author: Dionisie Gitlan

I've been writing for SSL Dragon for over 10 years, focusing entirely on SSL certificates and digital security. My job is to take complex cybersecurity topics and strip away the jargon, making sure you get the clear, practical information you need to keep your website safe.

Articles by Dionisie Gitlan

10 SSL Incidents That Prove Certificate Automation Was Inevitable

The cybersecurity crowd loves to pitch certificate automation as some sleek, forward-thinking upgrade for the modern web. But let’s be real: we didn’t get here because everyone suddenly became proactive. We got here because the industry kept messing up. Automation isn’t a reward for good behavior; it’s an intervention. For years,we’ve seen a spectacular parade […]

Why Certificate Automation Still Has Low Adoption

Certificate automation is a solved problem. The tools exist, the CAs support them, and most IT teams understand the risk of going manual. Yet 38% of organizations still manage certificates with spreadsheets, and 70% admit they don’t have the staff to keep up. The gap between what’s available and what’s adopted isn’t a technical story. […]

Why the Post-Quantum Certificate Challenge Is Bigger Than Shorter Validity

The SSL industry already has one countdown on the wall. By 2029, the old annual renewal rhythm will be gone. Certificates will expire faster, automation will be mandatory, and businesses still running on calendar reminders will fall behind. That challenge, at least, is legible. The harder problem is not about time. It’s about visibility. Post-quantum […]

Let’s Encrypt Pauses Certificate Issuance After Internal Error

On May 8, 2026, Let’s Encrypt temporarily stopped issuing certificates after detecting an internal error in its certificate system. Existing certificates remained valid, but new requests and automated renewals were affected during the interruption. Service was later restored after Let’s Encrypt changed the affected issuance path. What Happened Inside Let’s Encrypt? The interruption traced back […]

Why The SSL Market Is No Longer Selling Encryption

If SSL certificates were only about encryption, the paid market should have collapsed by now. Basic HTTPS is everywhere. Free DV certificates protect ordinary websites. Hosting panels turn SSL into a checkbox. Browsers no longer treat encrypted pages as special; they flag unencrypted ones as broken. Yet paid SSL still exists. The market thrives because […]

Best Code Signing Certificate Providers in 2026

Picking a code signing certificate provider is harder than it should be. Four publicly-trusted Certificate Authorities cover almost every legitimate buying scenario: Sectigo, Comodo, DigiCert, and GoGetSSL. At first glance they all look similar. They issue the same X.509 certificates, follow the same CA/Browser Forum rules, and ship hardware tokens that meet the same FIPS […]

From 398 Days to 47: What the New SSL Certificate Lifetimes Mean

SSL certificate validity is changing, and the shift has already started. The industry is moving away from long-lived certificates and toward much shorter lifetimes, forcing a different approach to how you manage SSL/TLS. This is not a minor update. Reduced SSL validity increases the frequency at which you issue certificates, validate domains, and handle renewals. […]

Behind the Tickets: What Really Makes SSL Errors Difficult to Debug

SSL certificates are often treated as a set-and-forget layer of infrastructure. Once installed, browsers stay quiet, and encryption fades into the background. From a support perspective, reality looks very different. Behind routine installations sits a steady flow of tickets where certificates are technically valid, correctly deployed, and still failing in ways that aren’t immediately visible. […]

CRT vs CER File Extensions Explained

You’ve just received your SSL certificate files and notice two extensions: .crt and .cer. Your server expects one, your certificate authority (CA) sent the other. Before you start troubleshooting, here’s the short answer: both file extensions hold the same X.509 certificate data, and the difference is mostly a naming convention. But “mostly” is doing some […]

Why Multi-Certificate Environments Break TLS Mental Models

At SSL Dragon, we work with SSL certificates across a wide range of environments, from simple single-domain sites to modern stacks where TLS is deliberately spread across multiple layers. Over time, that range makes one thing clear: TLS itself is stable, but the way it’s understood hasn’t kept pace with its evolution. Today, HTTPS commonly […]

Tutorials by Dionisie Gitlan

How to Install an SSL Certificate on Office 365

This tutorial explains how to install an SSL certificate for Microsoft 365 (Office 365). The important part comes first: you do not, and cannot, upload an SSL certificate into the Microsoft 365 cloud itself. Microsoft manages TLS for Exchange Online, SharePoint Online, and the other hosted services. You manage commercial certificates only on the servers, […]

How to Install an SSL Certificate on Exchange

In this guide, you will learn how to install an SSL/TLS certificate on Microsoft Exchange Server. We cover the modern method for Exchange 2016, 2019, and the new Exchange Server Subscription Edition (SE), plus archival steps for legacy versions.

How to Install an SSL Certificate on NGINX

This guide shows you how to install an SSL/TLS certificate on NGINX. It covers the part that trips most people up: building the correct certificate chain (“fullchain”) that NGINX requires, pointing the right directives at the right files, testing the configuration before reloading, and adding a clean HTTP to HTTPS redirect so every visitor lands […]

How to Install an SSL Certificate on IIS 10 & other versions

This guide shows you how to install an SSL certificate on Microsoft IIS (Internet Information Services) on Windows Server. It covers both ways a certificate reaches IIS: completing a pending request from a .cer or .p7b file, and importing a .pfx file that already contains the private key. It also includes a PowerShell method and […]

How to Install an SSL Certificate on a Debian Server

This guide explains how to install an SSL certificate on a Debian server with Apache. How to generate CSR for a Debian server? Before installation, your first task is to generate a CSR (Certificate Signing Request) code. This is the standard procedure when applying for an SSL Certificate. The CSR contains relevant details about your […]

How to Install an SSL Certificate in cPanel

This guide gives you step-by-step instructions on how to install an SSL certificate in cPanel. cPanel is one of the most widely used web hosting control panels, and the SSL installation is straightforward even without advanced technical skills.

How to Install an SSL Certificate in AWS

In this tutorial, you will learn how to install an SSL certificate in AWS (Amazon Web Services). On AWS you do not install a certificate on a single server the way you would with Apache or Nginx. Instead, you import the certificate once into a certificate store, then attach it to a managed service (a […]

How To Install an S/MIME Certificate on Thunderbird

Thunderbird has supported S/MIME for as long as it has existed, and it handles it differently from Outlook in one way that determines everything else: it keeps its own certificate store. Nothing you install into Windows, macOS or your Linux keyring will show up in Thunderbird, and nothing you import into Thunderbird appears anywhere else. […]

How To Install an S/MIME Certificate on Outlook

An S/MIME certificate lets you digitally sign your emails, so recipients can tell the message really came from you and was not altered, and encrypt them, so only the intended recipient can read them. It is an email certificate, not the SSL/TLS certificate that secures a website, and the two are not interchangeable even though […]

How to Remove Certificates from Windows

Certificates pile up in Windows. A test certificate from a project that ended, a corporate root left behind by software you uninstalled, an expired certificate on a web server, a client certificate that no longer authenticates anything. Removing them is straightforward once you know two things: which of the several certificate stores it is actually […]