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
Useful links:
en.wikipedia.org/wiki/Reserve...
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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
soundcloud.com/eqmuseq/loveli...
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[@jamesarias2363]

This channel is extremely useful and clear. Thanks David!

[@TechTutorialsDavidMcKone]

Thanks for the feedback, it's always appreciated
And good to hear you're finding the videos useful

[@user-lt6mr9gb7h]

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.😁

[@TechTutorialsDavidMcKone]

Thanks for the feedback
Firewalls can be confusing when you first look to set them up
So good to know the video was helpful

[@SyberPrepper]

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

[@TechTutorialsDavidMcKone]

Thanks for the feedback
And good to know the videos helped

[@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. 🤝

[@TechTutorialsDavidMcKone]

Thanks for the feedback
I've built up a lot of knowledge about IT over the years and I'm still finding out new things
So I'm happy to share that so it can help others

[@steveshirley2250]

good info, weird chosen background for IT prep lol

[@TechTutorialsDavidMcKone]

It's just the wall behind my computers at home
After a while the walls or even entire rooms end up with themes
After buying a print of Audrey Hepburn, this side of the room became Hollywood actresses

[@vincentgallo3351]

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!

[@TechTutorialsDavidMcKone]

Thanks for the feedback, I appreciate it
I'll add these requests to my list

[@barryarmstrong5232]

Superb video thanks David

[@TechTutorialsDavidMcKone]

Good to know the video was useful

[@matthewkramer8613]

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

[@TechTutorialsDavidMcKone]

I have a Linux computer so I'm using drawio
www.drawio.com/
You can run it on a Mac or in Windows though
And you can even run it online using a web browser for free

[@ericsmith6996]

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?

[@TechTutorialsDavidMcKone]

Good question
The video is only meant to cover the basics of firewall rules
It wasn't intended to cover the mechanics of how a firewall forwards traffic from one network to another
So this firewall was only given some basic interface settings so I could provide practical advice on how to structure firewall rules

[@ericsmith6996]

@@TechTutorialsDavidMcKone understood. Thank you.