Inside Local, Inside Global, Outside Local, Outside Global -- NAT on Cisco IOS Routers

Cisco likes to use these terms to describe NAT: Inside Local, Inside Global, Outside Local, Outside Global. This video illustrates what each of these terms mean by defining the individual words within each term: Inside vs Outside, and Local vs Global.

This is a free lesson from my course on Network Address Translation on Udemy. The course runs $30 normally, to get it for $12.99, use this link:

If this link's coupon is expired, check this page for the most up to date discounted referral links:

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The full course has two modules:

The first module will teach you Everything there is to know about Network Address Translation: Why it exists, How it it works, What happens to packets as they get translated. This module will explain every type of translation: Static NAT, Static PAT, Dynamic PAT, and Dynamic NAT. You'll learn about each of these in a way that is completely vendor agnostic -- the concepts you learn here will apply to any vendor and any platform. You'll then learn how these four types of translations are used in Policy NAT and Twice NAT.

The second module will teach you how to Configure and Verify each type of address translation discussed in Module 1. If you configure or troubleshoot NAT on a Cisco Router, this is the module for you! We'll methodically take you through the the syntax for each type of NAT and show you various show commands that let you validate NAT's operation.

The lab topology will show and prove every NAT concept from Module 1, as we show you a packet capture before it arrives on the NAT router, and after it leaves the NAT router -- showing you exactly what is changed and in what situations.

This course is the last resource you will ever have to study to become a subject matter expert (SME) on NAT on a Cisco Router.

[sinade]

The instructor knows how to simplify difficult technologies. The uncommon quality among Cisco instructors. If you can understand these terminologies, NAT becomes easy. Well done!

[darkconviction]

This is the absolute best explanation I have ever seen for this, thank you so much!!

[rogerward]

Finally, a clear explanation! Thank you!!

[catalyticcentaur]

I came back here for these definitions after quite some time... Good, that it's still here.
Thank you, Ed, for providing your very good presentations.

[usernotfound]

I have a final in Cisco 4 in like... 51 minutes. I found your channel reviewing for the exam and I really like your channel. Thank you so much for the effort you put into this. It's really helped me a lot.

[Recken]

I haven't come across NAT yet in my studies, but I'm sure I'm going to be grateful for this informative video. Great Job.

[anilrs]

Nice and simply explained. Thanks for the video :)

[eduardovilchis]

Very clear, nice and concise explanation of a complex topic. Thank you so much for uploading this video : )

[sahmad]

best explanation I have ever seen for this, thank you so much!! Free Palastine from america and Isreal

[cspell]

Well presented, came back for a refresher and I remember it being trickier to understand when I first got my CCNA,

[christianvega]

The best explanation that I've ever been seen.

[jerikho]

Thank you for the short, clear and perfectly understandable video, sir.

[jeffsims]

This is a refresher for me and this explanation gave a clearer understanding than I had before. Thanks!

[thearcher]

Oh God. Thank you. I was tearing my hair out reading obtuse RFC's and wondering why outside local/outside global are the same values (in which case why tf are they diff terms). But obviously I was unaware of more complex configs such as twiceNAT or NAT-ing destination IP

[TheSonyup]

Best explanation on outside local and globals.

[ttitrends]

The topic is very difficult. But you explained in a very easy way and made me understand very well.

[fneziofzfezjifoez]

Exactly what i was looking for, thanks.

[SandeepKumar-gfkj]

By reading Documents, was not making me understand these terms, but you explanation was quite clean :) keep it up

[Marco-lsou]

Well Done! Keep up the good work! Thanks a lot!

[mellow]

This series is really good, can you make DNS deep dive series like SSL, TCP/IP series? There is no series on youtube which talks about DNS at packet level.