Someone Can Get an SSL Certificate for Your Domain. CT Logs Are How You Find Out.
Here is a failure your monitoring is built to miss. Somebody — an attacker who briefly controlled your DNS, a subdomain you forgot you delegated, an…
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NET::ERR_CERT_AUTHORITY_INVALID: When the Root Itself Is Not Trusted
The hostname matches. The chain is complete — every intermediate is present, each certificate signs the next, and it all leads up to a single certif…
Confused by DV, OV, and EV SSL Certificates? This Article Will Clear It All Up
First, Let's Clarify What SSL Certificates Actually Do Before diving into DV/OV/EV, let's quickly run through the basics of SSL certificates. An SSL…
HTTP-01, DNS-01, and DNS Delegation: What's the Difference When Getting an SSL Certificate?
First-timers applying for an SSL certificate almost always get stuck at this step — picking a validation method. The UI shows HTTP-01, DNS-01, and s…
What's the Difference Between Free and Paid SSL Certificates — and Why Do Prices Vary So Much?
When people first encounter SSL certificates, they often ask the same question: If a free SSL certificate can already make a website HTTPS and brows…
TLS Is Easy to Enable and Hard to Get Right
Enabling TLS is a solved problem. Get a certificate from Let's Encrypt, point your server at it, done. What's not solved is the configuration that c…
Guide to Automatic SSL Certificate Renewal for Nginx and Docker
Not long ago, when the certificate for the hesapciyiz.com site I host on my own VPS expired, I woke up to an email in the middle of the night. Yes,…
Why Subject Alternative Names (SANs) Matter for Modern Browsers
Originally published on cert-depot.com . Free, open-source self-signed certificate generator — no signup, keys never stored. Why Subject Alternative…