Each of us has faced this error at least once, but probably not all of us have noticed that it appears differently in different browsers.
For example, you may get the “The Webpage is not available” or “The site can’t be reached” warning.
SSL Errors
Fixing “Self-Signed Certificate in Certificate Chain” Errors
As you can notice from the text of the error itself, the “Self-Signed Certificate in Certificate Chain” error indicates that a self-signed certificate is present in the certificate chain but is not trusted by the client’s system.
This often occurs when a website or application uses a self-signed certificate instead of one issued by a trusted Certificate Authority (CA).
Can a Wildcard SSL Certificate Be Used on Multiple Servers?
Yes — a wildcard SSL certificate can be used on multiple servers, as long as you export and install the certificate and its private key properly.
Just be aware that sharing the private key introduces some security risks, so it’s important to follow best practices when doing this.
How To Fix a Cloudflare 525 Error: SSL Handshake Failed
The Cloudflare 525 error signifies a problem with the SSL handshake between Cloudflare and the origin server.
Essentially, it indicates that Cloudflare was unable to establish a secure connection to the origin server as it does not respond correctly to SSL requests.
How To Fix a Cloudflare 526 Error: Invalid SSL Certificate
The Cloudflare 526 Error tells us that Cloudflare cannot successfully validate the SSL certificate on the origin web server when Cloudflare is set to use the Automatic or Strict option.
Let’s examine this error in more detail.
OpenSSL Cheat Sheet: 12 Common OpenSSL Commands
OpenSSL is an open-source software library and a powerful command-line tool for cryptography, encryption, and secure connections.
Despite some imperfections, OpenSSL remains a very popular tool for developers and administrators. OpenSSL users commonly use it for key generation and SSL certificate format conversion.
How To Install an SSL Certificate on Apache with CentOS 8
In this article, we will go over the step-by-step instructions on how to install the SSL certificate on the Apache Web Server for CentOS 8.
Please make sure that which version you are using as the process slightly differs.
Install a CA Bundle to Fix SSL Issues
In the world of digital security, where trust in websites is key, the CA Bundle (a bundle of Сertificate Authorities certificates) is becoming an integral part of ensuring a secure connection between a user and a server.
Think of your browser as a border guard: it checks documents before letting someone in. If a site doesn’t have a full set of trusted certificates, its “passport” will be questioned. This is where the CA Bundle comes into play.
From CRT to PEM: A Simple Guide to SSL File Conversions
Creating a PEM file is necessary to install TLS/SSL certificates correctly in some environments.
A PEM file is a text file containing one or more certificates and, optionally, a private key. (While a CRT file only contains a single certificate.) Below are different ways to create a PEM file, depending on your installation needs.
How to Fix the Certificate Error ‘ERR_CERT_DATE_INVALID’
Learn how to fix the invalid certificate error in Google Chrome and Firefox
Did you know that every SSL/TLS certificate is issued with a specific validity period? This period encompasses the certificate’s issuance and expiration dates. So, if you see the SSL/TLS certificate-related error messages “NET_ERR_CERT_DATE_INVALID” or “SEC_ERROR_EXPIRED_CERTIFICATE ” in your browser when using Chrome or Firefox, it typically means the site’s SSL/TLS certificate is being used beyond its validity period and is no longer trustworthy.
In other words, any site using this certificate isn’t secure, and any data transmitted is at risk of compromise by man-in-the-middle (MitM) attacks. Not to mention the business risks and downtime issues your site or services will experience as the result of an expired certificate.
