Security Archives - Hosting.Guru

Securing ImageMagick installation

Posted on October 14, 2025

Source: https://imagetragick.com/ Read original article, it explains, that specific formats can lead to local command execution. This makes me think and blame it for so […]

Security

My website has been hacked. Who’s fault is it?

Posted on December 7, 2023

As system administrator working for hosting company – this is the question, that many ask “silently” or at least – question that is in the […]

Security, Wordpress

Is my website hacked? …and cleaning strategy!

Posted on October 3, 2023

Quick post with list of third-party systems, where you can easily check – if your website has any (usually) Javascript injected scripts or other viruses […]

Online tools, Security

New email password scam

Posted on May 15, 2023

Hackers were trying to get user passwords for quite a while. Usually they will send you an email, like it would be from your hosting […]

Security

Fixing Grafana Telegram notification screenshots

Posted on April 25, 2023

This is for CentOS 7 I have recently upgraded to Grafana 9 and stopped receiving screenshots from Grafana notifications over Telegram bot. That sounds embarrassing, […]

Linux, Security

MySQL Tuner

Posted on March 23, 2022

Just a small note about amazing tool, that can analyze runtime variables of your MySQL server (also MariaDB) and give overview and recommendations – based […]

Linux, MySQL, Security

SSH connection to old servers

Posted on December 15, 2021

When you are on a newer Linux distribution and try to connect to older server, you might run into a problem and get message like: […]

Security

Stuff, that helped me to add IP-subnet to KVM host

Posted on November 12, 2021

I had a server, that run Centos8 and had several KVM-virtualized machnies. Most of virtual servers had dedicated IPs and when one customer wanted to […]

Linux, Security