April 2019
Beginner
768 pages
18h 6m
English
Content preview from Windows Server 2019 & PowerShell All-in-One For Dummies
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Chapter 4
Working with the Internet
IN THIS CHAPTER
Understanding the Basics of the Windows Defender Firewall
Configuring and Managing the Windows Defender Firewall in Windows Server 2019
There are few things more basic to security than the principle of keeping bad things out and letting good things in. You may choose to block or restrict inbound traffic from risky protocols or port numbers. You might even lock down outbound traffic to only approved protocols and port numbers. Defining the acceptable forms of inbound and outbound traffic is typically accomplished with the Windows Defender Firewall.
In this chapter, I introduce you to the Windows Defender Firewall, including the configuration and usage tasks that every System Administrator should know.
Firewall Basics
The Windows Defender Firewall is a stateful firewall. This means that you can create a rule to allow inbound traffic, and established traffic will automatically be let back out. If you create an outbound rule, traffic going out will automatically be allowed back in. It can inspect all traffic passing through it and track the state of the connection. This is a great improvement over the older, traditional firewalls, referred to as stateless firewalls, for which you had to create a rule to allow traffic in both directions ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.