Wrong SSL certificate interfering with Outlook and Virtualmin IMAP/SMTPS
This morning an old established client tell me he has been getting certificate warnings, and lately a lot of problems sending email. After some time
lets-encrypt
How to test SSL ports HTTPS, 465, 587, 995 and 993 using openssl
Introduction Fixing certificate problems can be really hard, but not if you have the right tools. Let’s do a quick exercise for HTTPS: Port 443
How to deal with a Let’s Encrypt certificate expiration notice for domain “example.com” on a Kopano / Generic system
Let’s Encrypt expirations can be a nightmare on unautomated systems. When it goes wrong on an automated systems it’s even worse. The bot will try
How to deal with ACMEv1 is deprecated and you can no longer get certificates from this endpoint. Please use the ACMEv2 endpoint
Whilst trying to renew a Let’s Encrypt certificate on an older CentOS server, you might experience the following: Cert is due for renewal, auto-renewing… Starting
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
The client lacks sufficient authorization whilst renewing a Let’s Encrypt certificate on a Virtualmin server
Background This is a complex issue and the interplay between various technologies such as DNS, HTTP Challenge, website (Apache / NGINX), permissions, and redirections can
DNS name does not have enough labels error when requesting a Let’s Encrypt server certificate
Whilst trying to retrieve a new Let’s Encrypt certificate on a Virtualmin server, the following error was encountered: Requesting a certificate for server_name from Let’s
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:
How to add a SSL certificate to your website with Virtualmin and enable HTTPS redirect
1. Login into Control Panel 2. Expand the Server Configuration menu. 3. Click on the SSL Certificate menu 4. Click the Let’s Encrypt tab. 5.