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 …
Migrate accounts from Kerio Connect to Zimbra Collaboration with ImapSync
In previous posts we saw what Zimbra Collaboration is, which prerequisites are necessary for its installation, how to install and configure DNSMasq and finally, how to install Zimbra. Now we’re …
SSL (HTTPS) with WordPress
Security is important for the web. SSL is the current security standard to establish safe connections between a server and a browser (HTTPS) and it makes sure that all data …
Zimbra Collaboration 8.6 – Installation
Previously we’ve seen what Zimbra is, what prerequisites must be met for its installation and how to install and configure DNSMasq to work with Zimbra. Finally, once we have the …
Zimbra Collaboration 8.6 – DNSMasq
In the previous articles we saw what Zimbra is and how to prepare the server with the necessary prerequisites to install it. We will now finish with these prerequisites by …
Zimbra Collaboration 8.6 – Prerequisites
As I explained in my first entry about Zimbra Collaboration, I’m going to dedicate a few articles to explain its prerequisites, installation and configuration, and to continue with this series, I’m …