ssl

WIN-ACME Installation to get Let’s Encrypt on PRTG

Preparation The PRTG Administrator Tool Windows desktop application is your friend here. Go to Custom Configuration and choose port 444. You cannot use port 80

Virtualmin ERR_SSL_PROTOCOL_ERROR

On an otherwise working Virtualmin port 80 HTTP website you may see the following error: This site can’t provide a secure connection example.com sent an invalid

How to enable TLS 1.1 and TLS 1.2 on Windows 7 and deal with Outlook encryption type errors

Basically Windows 7 is end of life 2020. Some users insist on still using it or don’t want to pay for upgrades, because actually, IT

How to install a CloudFlare origin server SSL certificate into Virtualmin

Background If your Virtualmin website is using Cloudflare as a proxy you can’t use the standard Let’s Encrypt HTTP method to request a fresh certificate.

A curated list of useful certbot commands

About Certbot Certbot is a lifesaver when the user interface you use to renew certificates does not deliver anymore. Some servers of course come without

When it comes to email systems, what the difference between port 465 and port 587?

This comes up every day. It makes setting up email less than trivial if it doesn’t work the first time around, or if your email

Mixed content warnings and other SSL tricks and tips for WordPress Hosting

If you’re hosting a WordPress website, you might run into some of the following SSL issues and warnings. When you view your site over SSL,

How to install Let’s Encrypt on cPanel/WHM

Let’s Encrypt is a free, automated, and open certificate authority (CA) provided by the Internet Security Research Group (ISRG). By default Let’s Encrypt is not installed on

403 Forbidden response when installing Let’s Encrypt on a Virtualmin server

Whilst trying to install / renew a Let’s Encrypt certificate on a Drupal 7 site running on a Virtualmin server, you get the following message: