docker.tar.gz

network-commands

node

It seems like hardly a week goes by without a high-profile computer breach. Why do these happen? How can you prevent them? This course doesn’t have all the answers, but it does outline practices that make life harder for attackers and that will help tide you over until you get a full-time security team in place.

In this course, you will learn 5 simple, yet effective, techniques for preventing attackers from getting into your system. These techniques are related to: patching, software vulnerabilities, cryptography, windows security, and phishing. Within each chapter you will learn the best practices for preventing vulnerabilities and how to make them more detectable. 

This course is based on the Pragmatic Programmers’ book, Practical Security, and is aimed at developers, admins, team leads, architects, technology generalists, and all others who stand guard against the things that disrupt the network.

Practical Security: Simple Practices for Defending Your Systems

## Introduction
DMARC, or Domain-Based Message Authentication, Reporting, and Conformance is another DNS-based email tool. It’s built on top of SPF and DKIM and has two main uses. First, it can be used to help troubleshoot complex SPF and/or DKIM rules. Second, it can be used to collect forged emails for later analysis. Let’s take a look at the DMARC records in use for punkgrok.org. We do this by looking at the TXT DNS records for _dmarc.punkgrok.org, as follows:

# Introduction
DMARC, or Domain-Based Message Authentication, Reporting, and Conformance is another DNS-based email tool. It’s built on top of SPF and DKIM and has two main uses. First, it can be used to help troubleshoot complex SPF and/or DKIM rules. Second, it can be used to collect forged emails for later analysis. Let’s take a look at the DMARC records in use for punkgrok.org. We do this by looking at the TXT DNS records for _dmarc.punkgrok.org, as follows:

In this lesson, we will discuss Domain-Based Message Authenticatioin, Reporting, and Conference and how it can help defend against phishing attacks.

Introduction

Patching

Vulnerabilities

Cryptography

Windows

Phishing

DNS-Based Defense: DMARC

Introduction #