Articles

Contents

• Articles and Manuals
• Tips and Brief Information
• Lists and Tables

Articles and Manuals

Alternate Data Streams (ADS)

Hide data in alternate data streams and extract it again.

Apple Mail

Creating message rules, examples of rules and searching in entire messages (header and body).

Apple Shortcuts App

An overview of the Apple "Shortcuts" app with examples.

Basics

Some basic topics such as number systems, character sets and encodings are covered here.

CyberChef

A brief overview of CyberChef and a description of its main features.

Determine E-mail Headers

This guide describes how to determine the headers of an e-mail in various e-mail clients and webmail services. It also covers saving the original message, including the headers, and forwarding messages in their original format.

Enter BIOS Setup

How to call the BIOS setup of various manufacturers.

Google Search Terms

This article shows different ways to hide data and files.

Hide Data and Files

This article shows different ways to hide data and files.

IP Addresses

IP addresses simply explained. Terms and tables for IPv4 and IPv6 addresses.

Password Security

This article is about password security and how to create strong passwords.

Recognize Fraudulent E-mails

This article describes how to recognize fraudulent e-mails, also called scam e-mails or phishing e-mails.

Spam Mails

This article describes how to protect yourself against spam, how spammers get addresses, and what tricks they use to send spam.

Understanding E-mail Headers

This article describes how the headers of an e-mail are structured and how they are correctly read and interpreted.

WHOIS (RIPE)

A description of the individual attributes of the RIPE network number and person object in WHOIS information.

Windows Batch Programs

This article contains information on how to use the Windows command interpreter, as well as variables and important commands in batch programs.

Windows Registry Files

The structure of registry files (.reg files) and how they are used to modify the Windows Registry.

Tips and Brief Information

General Tips

General tips, configuration options and useful information for various applications.

MacOS Tips

Tips, configuration options, keyboard shortcuts and useful information about Apple MacOS and Apple apps.

Windows Tips

Tips, configuration options and useful information about Microsoft Windows and Microsoft applications.

Lists and Tables

ASCII and ANSI Character Table

A list of all ASCII and ANSI characters with names and character codes.

Color Tables

This page contains color tables for HTML, CSS and SVG.

CyberChef Recipes

Recipes for CyberChef, a web application for analyzing and decoding data.

E-mail Header Fields

Over 300 e-mail header fields with their description and additional information.

Filename Extensions

An alphabetically sorted list with over 4.100 filename extensions.

HTTP Status Codes

A description of the status codes in the HTTP protocol of various web servers such as Apache, IIS and WebDAV.

Linux Commands

A list with the most important Linux commands.

Port Numbers

A list of port numbers, their name, description, and additional information.

Regular Expressions

A collection of useful regular expressions, among others for URLs, phone numbers, e-mail addresses, IP addresses and wallet addresses.

Time Zones

A list with all time zones.

Top-Level Domains (TLDs)

A list with all Top-Level Domains (TLDs).

Unicode Character Tables (Content)

A list of the most important Unicode characters with name, character code and HTML encoding.

Windows Version Numbers

A list with version and build numbers of Microsoft Windows.