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Security

OpenWRT on Fritz!Box 4040
Security

How to install OpenWRT on a AVM Fritz!Box

Everyone has one: An Internet router. Whether you have a cable-only or a wireless router, ...
By Claudio Kuenzler
June 21, 2023
Router Internet Port Forwarding
Security

How to configure public port forwarding to an internal IP address

Sometimes you may want to "redirect" network traffic. You could be running your own web ...
By Claudio Kuenzler
June 14, 2023
Cloud Digest
Security

Geeker's Cloud Digest – 4/22

Welcome to another edition of Geeker's Cloud Digest, a digest of several cloud related news ...
By Claudio Kuenzler
January 27, 2023
Internet Globe
Security

What is an unvalidated redirect?

If you're working with security audits and vulnerability scanners, you might come across the term ...
By Claudio Kuenzler
February 17, 2022
TLS certificate chain
Security

How to create and troubleshoot OpenSSL SSL/TLS certificates

Working with SSL/TLS certificates? Need to verify a certificate chain? Need to create a private ...
By Claudio Kuenzler
November 26, 2021
Facebook data leak
Security

Data from 500 million Facebook users leaked and shared for public download

A massive data leak from Facebook was collected and shared online, which includes data from ...
By Claudio Kuenzler
April 7, 2021
How DNSBL works
Security

What is a DNSBL (DNS Black List) and how do they work against spams?

A DNSBL, also known as DNS Black Lists or DNS Block Lists or RBL (Real-time ...
By Claudio Kuenzler
February 4, 2021
Wordpress stats
Security

How to protect your WordPress site from brute force login attacks

Every WordPress administrator looking at site statistics becomes quickly aware that one of the most ...
By Claudio Kuenzler
February 2, 2021
Windows
Security

How to kill your Windows machine in one second (critical NTFS vulnerability)

There is a critical vulnerability in Windows which will destroy the NTFS file system when ...
By Michael Aigner
January 16, 2021
Let's Encrypt Logo
Security

Certbot unable to issue certificate, instead asks for 'Please choose an account'

When trying to add a new Let's Encrypt TLS certificate, certbot failed with the following ...
By Claudio Kuenzler
January 6, 2021

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Latest Posts

Hate the new Slack user interface? Fix might be coming soon.

Understanding the Linux / Unix file permissions

How to change git commit message text

OpenTF (Open Terraform) created after HashiCorp license change

Happy 30th Birthday, Debian!

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