pingofdeath.io
Send Suricata alerts via e-mail or ntfy
Suricata only logs alerts, so you have to send them yourself
Setting up v2ray with vmess on Debian/Ubuntu
Setting up v2ray can be confusing, but there is help.
Creating canary links as layer of security
If you take your defense in depth seriously, you should be able to detect a breach after the first line of defensive fell. One way is to create canary links.
Why people in some countries can't use Signal
I've mentioned before that Signal is the gold standard for encrypted communication. But the verification process makes it hard to impossible for some people to use it...
Debian/Ubuntu Two-Factor Authentication (2FA) with Yubikey and Google Authenticator
Yubikeys are a great way to secure your ssh accounts with 2FA.
KVM: Convert non-sparse RAW image to sparse qcow2
I recently had a raw KVM image which was accidentally created with virt-install without sparse options. How to convert it?
Telegram Security vs. WhatsApp, Signal and Threema
Facebook lately announced that they will share more data between WhatsApp and Facebook. Is Telegram a secure alternative?
CentOS will be discontinued
CentOS will be, at least in his current form, discontinued.
Install AIDE on Debian 10 (buster)
If you wanna check the integrity of your Linux system, you have many open source options. One of them is AIDE
Send e-mail notification on ssh login
An easy way to activate an email notification when someone is logging in via ssh.
Alienvault USM with KVM
When you buy your license for an virtual Alienvault USM appliance, you get a download link for a VMware OVA image. How to use with KVM?
Letsencrypt in Debian 10 (buster) for Apache
Many tutorials on the internet (including the official one) giving installation options for your letsencrypt which are actually not the easiest ones.