2+ day, 17+ hour ago   (716+ words) Chrome stops a page and prints NET::ERR_CERT_COMMON_NAME_INVALID when the name written on a site’s SSL certificate does not match the address you asked for. Most cases trace back to the server. A smaller share come from your own device, a…...

6+ day, 15+ hour ago   (235+ words) Hi. I maintain a library called AutoHttps. It gets a real TLS certificate for your ASP.NET Core app from Let's Encrypt (or any ACME certificate authority) and renews it automatically. You add the package, set three values, and Kestrel…...

1+ week, 3+ day ago   (1587+ words) Most developers use TLS constantly and understand it vaguely, "it's the padlock, it means encrypted," without a clear picture of what's actually happening or, more usefully, what actually breaks and why when a cert issue takes down production. Let me…...

2+ week, 4+ day ago   (439+ words) https://appdirs.com/ At 2:02 AM, everything was working. At 2:03 AM, users started receiving connection errors. The servers were running. CPU and memory were …...

2+ week, 5+ day ago   (330+ words) Runbooks still say "renew the SSL certificate" when the browser warning is obsolete protocol. The certificate can be brand new. The tunnel is still TLS 1.0. This is a shortened English note. The tables, handshake diagram, and OpenSSL CLI checks live…...

2+ week, 5+ day ago   (727+ words) The certificate is real. It's signed by a genuine CA, it's nowhere near expiry, and the chain is complete. And the browser still slams the door: This is a different failure from the two it's most often confused with. It…...

2+ week, 5+ day ago   (260+ words) RDAP introduced structured JSON formatting, secure transport layers, and standardized query syntax. From an engineering standpoint, it was a triumph. Yet, RDAP hit a hard ceiling when deployed globally, exposing a fundamental limitation of the IETF’s mandate: protocols can dictate…...

2+ week, 5+ day ago   (461+ words) You open the site in a browser and the padlock is green. Then your app tries to call the same host and dies: Here is the reframing that makes the whole error make sense. A TLS server is supposed to…...

2+ week, 5+ day ago   (34+ words) Public TLS validity dropped from 398 days to 200 days on March 15, 2026, the first of three cuts on the way to 47 days in March 2029. Most CAs moved early, so c...

3+ week, 5+ hour ago   (197+ words) Fiber broadband and technology provider Converge ICT Solutions Inc. blocked nearly 12 billion attempts to access websites hosting dangerous, inappropriate, and harmful content through its network in 2025. The company also blacklisted more than 72,000 domains and web addresses linked to prohibited content…...