How Network Address Translation Works

Explanation of what Network Address Translation is, how it works and why we need it to keep the internet growing. IP version 4 and 6 are also discussed.

[varunsaproo]

8 years later, this video is still perfect

[lukasaudir]

Man that's sad that this guy stopped working on this channel all his videos are great and super simple to understand, he has a gift 👍

Thank you Pieter!

[kennethhowell]

Thank you! After 10 years of trying to understand nat, you have explained it clearly in 2 seconds. Thank you!

[bsummer]

I came back here because of aws natgateway . Your vid always clears doubts. Thanks for this.. Appreciate

[DiaborMagics]

This video is pure GOLD! Thank you so much! You explained this about 4.2 billion times more clearly than my professor!

[alecdoazan]

This is the best video series on the web for understanding internet networking. I personally suck at it, and now I feel like I could explain all of it to other! Brilliant!

[LynFantast]

I was disappointed to click on your channel and see that you had no more videos. This one was of great help, I hope you make more!

[luisalduucin]

Amazing ... you only can explain something when you understand it. This video proves that you understand it very well . Thanks

[michaelstyler]

Pieter, you have a gift for teaching. Please consider making more videos. I've been learning CompTIA Network+ Objectives for the exam and am brand new to networking, and your teaching style and presentation is perfect. The visuals are super high quality and helpful. Thanks for doing what you do. Your materials are some of the best on the internet.... but you need more videos! Lol

[Exodiq]

watched like 50 videos that explain the internet and that was the only one that really helped . Thanks alot!

[smiley]

I came through NAT but I never was able to understand the clear picture of WHAT and HOW it works. You explained bit by bit. Simple and easy. Thanks :)

[irfan_antennas]

Your video did my assignment of Avionics Engineering in 2020 . Thanks keep rising and shining.

[seetsamolapo]

Please make more videos. This was hands down the best explanation for NAT

Don't mind me just making myself some notes here:

-There are more people available who even use more devices than there are IPv4 addresses

-Local machines in a local network are all connected to a router, which is in turn connected to the internet - external public networks

- To reach a public server, the packet from a local private IP has to go through the home/local router. Then through the internet - multiple routes. Then finally the webserver.
- The home router changes the packet private IP source address into its own public IP address
- The home router also creates a NAT forwarding table which helps with return packets to know which packets go to which host in the local network by mapping host's private addresses to reserved public addresses in it
- The web server creates a response packet with it's destination as a the home router which is a public IP
- At the home router the packet's destination IP address is changed to the corresponding/matching local private IP address on the NAT forwarding table. Then the packet will be forwarded to the local host

[Spaniards]

Thanks a lot for your explanation! Please do not stop sharing your knowledge. This is needed by people who, like me, are trying to learn these concepts.

[kidtury]

Really straightforward and easy to understand. One of the best tech explanation videos out there. We need more.

[LakshmipathiG]

Honestly, this channel deserve at-least half-a million (not 40k) subscribers. Thank you for your time and effort.

[Benjamin-bffo]

Your videos are life savers! I'm in the middle of studying for my exam on networking and the officiall university slides use so much technobabble that it's hard to grasp the underlying concepts.
Also these videos are exceptionally well structured and your voice is very clear.
Thanks a lot for doing this!

[jasonscalzo]

I've been having trouble understanding NAT and your video is what did it for me, thanks a lot! I had trouble realizing that private IP addresses can be reused on different networks, something I kind of already knew, and understanding how the router knows which device to send the packets to. You explained it wonderfully

[RaghunandanChakravarthy]

The concepts have been articulated very eloquently. Please make more videos like this and share your knowledge with us.

[maryjohn]

I have taken a full course in networking in India and haven't get to know how NAT works.But this video helped me to understand this concept.Great video.Keep this up Pieter.