What are the Basics of Firewall Rules?

Firewalls play a very important role in IT security and in this video we discuss the basics of firewall rules

If you structure them in the proper way it will not only make it easier to maintain them, but it's less likely you'll accidentally allow access to something you didn't intend

We cover how creating sections can make rule handling easier to manage

How to set up different rules for access to internal servers and Internet servers

How to configure external facing rules and things to consider when self hosting your own computers on the Internet

We discuss how to manage rules for external firewalls

And also how stateful firewalls work and why guidance for bi-directional rules usually doesn't mean creating client AND server rules on your firewall

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Chapters
00:00 Intro
00:45 Sections
03:44 Access to Internal Servers
15:23 Access to Internet
22:37 Rule Correction
24:28 External Rules
28:13 Self Hosting
36:06 External Firewall Rules
38:28 Stateful Firewall Rules

Credits
LoveLife | Instrumental Prod. Blue Mango | EQMUSEQ.COM by Don Da Vinci

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[jamesarias]

This channel is extremely useful and clear. Thanks David!

[ltmrgbh]

You are a thorough teacher and seem to present a lot of scenarios for different use cases sir. I'm honored to be able to listen to your knowledge. I'm currently trying to figure my way around pfsense and it's been really hard for me since I'm changing over from an ISP owned router. Thought it would be a walk in the park, but boy was I wrong. Thank you for your help and taking your time making this video sir.😁

[arnoldoree]

Thanks again. Needed to concretize / formalize my knowledge / understanding of firewalls & firewal rules, in order to realize a solution to bring our public IP address range traffic at datacentre onto targeted VLANs; as part of an initial datacentre migration for several hosts and workloads.

Ended up getting exactly the understanding I required, having completely architected the "public IPs > firewall > VLAN > service_interface" solution about 10 minutes from the end of the second video of the pair. The comment about network address translation actually brought it all together.

Also got a lot more than I bargained for, and now have a base methodology for configuring my firewall rules @ datacentre.

So once again many thanks. 🤝

[SyberPrepper]

Both of these new videos are very helpful. Thank you.

[vincentgallo]

Very comprehensive, excellent video. If there are more port, firewall, network security, or virtual networking videos I am looking forward to seeing them. Top notch content!

[steveshirley]

good info, weird chosen background for IT prep lol

[matthewkramer]

What diagram tool are you using? This is excellent content!

[ericsmith]

I'm confused. The PFSense firewall isn't routing between the 192.168 and the 172.16 LANs, so how is it blocking/allowing access between them (the DNS rule)? Is the traffic going out across the WAN interface and then back in?