TLS/SSL
Certificate hostname mismatch, self-signed, untrusted: what each means
Three different certificate warnings, three different causes. Knowing which one you have is the difference between a five-minute fix and chasing the wrong problem.
Tag
#tls-ssl
TLS/SSL
Your SSL certificate is expiring: automate it before it bites
An expired certificate does not degrade quietly — it slams up a full-page browser warning that stops visitors cold. The fix is to stop renewing by hand and automate it.
TLS/SSL
Forward secrecy (PFS): the cipher property that protects past traffic
If your private key is ever stolen, forward secrecy decides whether attackers can read only future traffic or every conversation you have ever had. Here is how it works.
TLS/SSL
Weak ciphers explained: RC4, 3DES, and why 'it still works' is not safe
Your site has a padlock and HTTPS works fine — so why does the scan flag a weak cipher? Because 'the connection succeeded' and 'the connection was strong' are not the same thing.
TLS/SSL
TLS 1.0 and 1.1 are dead: why your old protocols are a liability
TLS 1.0 and 1.1 were retired years ago, but plenty of hosts still accept them. Leaving them on is a quiet liability — here is what to support instead.
TLS/SSL
Is my SSL/TLS actually secure? A plain-English checklist
The padlock only means encrypted, not strong. Real TLS security depends on three things: which protocols you accept, which ciphers you offer, and your certificate's health.
Security Headers
HSTS explained: why HTTPS alone is not enough
You have HTTPS — but the first plain-HTTP request is still a weak point. HSTS closes it by telling the browser to never speak HTTP to your site again.