This past February, thousands of ESXi servers were affected by a new ransomware attack (called ESXiARGS) that targeted the servers through a security flaw (tracked as CVE-2021-21972, CVE-2021-21973 and CVE-2021-21974), …
Zimbra: /snap/core at 100% – Disable Disk Space Monitoring for Loop Devices
I recently logged into the Admin mail account of a Zimbra mail server I manage to see if there was anything noticeable to look at. It’s not an account I …
Zimbra – Upgrading SSL certificates after Let’s Encrypt DST Root CA X3 expiration
On September 30, 2021, the Let’s Encrypt DST Root CA X3 certificate expired. This certificate was used to sign all SSL certificates generated by Let’s Encrypt. To avoid serious problems, …
WordPress – error:1408F10B on API calls.
I recently set up a new server for a WordPress website. I prepared it following the same process as always: Ubuntu 20.04 as the operating system, Nginx as the web …
“User unknown in virtual alias table” Error in Postfix and Virtualmin
I recently came accross a strange issue with Postfix and Virtualmin on every website hosted on my server when someone tried to send a mail using a contact form. The …