NAT - SNAT, DNAT, PAT & Port Forwarding

[@IreshDissanayakaM]

Everything at high level in just 9 minutes yet more than enough clarity and slowness to understand. Everything on point. This is awesome! Thank you Sunny.

[@yalidfuentes7985]

He is a great teacher.

[@lauradesouza9980]

He’s a great teacher, I’m learning so much with him!

[@Plainstreamer]

Slow network? To understand it?

[@vadicheg]

wow man i watched 2 other videos had few open questions, watched your 9 minute video and everything is clear now. You are talented teacher

[@na93r]

@Sam Darwin this is a spam

[@asyed1000]

I love how Sunny explains the brief history behind technology in his videos, since at times it is a crucial part in the learning process to understand how the technology came to be and why we need it.

[@biosah]

Simplicity! I love how you slowly and patiently explain complex subjects. Thank you🙏

[@elisdamirchi1447]

I never write comments, but here it goes: Networking topics will be part of my final exam in two weeks and honestly your videos have been such a life saver. I hope you know you're changing lives with your content! Thank you Sir!

[@sunnyclassroom24]

Great to hear!

[@lounescharef2441]

Thank you sunny, i have been in the field for over 18 years, no one made the concepts so clear for me, You're the best! I like your chenglish toooooo.

[@LeirbagIII]

Simple and very well explained. I get back to Sunny anytime I need to review the basics of any topic. Thanks Sunny!

[@PT-ww9nc]

Thank you Sunny, I have been watching many KZbin videos but they do not explained this in such a logical and simple way.

[@jamesj9744]

Whenever my Udemy instructors are being jive turkeys, I always look up Sunny's Classroom for a clear explanation. This guy is the best!

[@haritadepalli959]

Excellent presentation. It is very difficult to find a similar presentation which explained the differences between the 4 concepts as clearly and as easily.

[@syednabeelanwar46]

Thank you sunny , i have gone through all your videos they are well explanatory . you are the Teacher of the century

[@bxldragonguy]

Credits to you fir explaining it in such a clear and easy understanding way, thanks!

[@sunnyclassroom24]

You are quite welcome, Steve.

[@Fearless......]

Give this man the nobel peace prize for teaching !

[@londhe99]

the music at the end is epic ! it gives me recall of life in year 1980s and that time TV shows have this type of music. any way the content is best and crystal clear. good work.

[@sunnyclassroom24]

Thanks a lot for your nice comment! I appreciate your encouragement.

[@AnshumanKumar007]

it's quite interesting how something really helpful and seemingly innoccous has prevented transition to IPV6.

[@fatpong6173]

Thank you Sunny, your videos helped me passed a lot of exams

[@roberth7830]

Currently learning network services and DNS. So glad to have found your channel. You provide such clear and logical explanations with helpful animations. Thank you for sharing! Subscribed!

[@rajivraghu9857]

Thanks Sunny.. you explain stuffs so well. Wish I found these lectures during my engineering..😃

[@sunnyclassroom24]

You are welcome and thank you for your nice comment.

[@AN1MATEK]

Sunny man you always come up when I want to learn something new about networking. Easy, clear but high quality!

[@sanjayprima]

Excellent . No Other video can be better than to explain NAT-PAT

[@JoshuaNartey]

A little confused here Read a book where SNAT means Source Network Address Translation and DNAT means Destination Network Address Translation. The explanation you gave for PAT is what was given for DNAT.

[@prashantbharadwaj3578]

What you read was correct. I am on the same page with you.

[@virendrabhati6685]

This was a simplest understanding of NAT and type. Examples are very simple and user friendly at each type of NAT describe by Sunny.

[@devinmorgan4953]

EXCELLENT VIDEO!! This was the explanation that I was missing 🙌🙌🙌

[@simonzhou8416]

Very clear, better than my expensive cissp textbook!

[@sunnyclassroom24]

Thank you for watching!

[@zidanetribal2343]

Awesome, Sunny is my to go resource whenever I need to refresh concepts in networking, security and basically IT! Thanks again Sunny for the topnotch content :)

[@zhenwang123]

Great video. It is very clear and detailed. Much easier to understand. Thank you Sunny.

[@sunnyclassroom24]

You are welcome!

[@kooolabo]

Thank you Sunny! clear explanation! To the point! no time wasting.

[@andygerard228]

Watching our videos always makes my mind feel less stress .

[@sougata7]

Awesome! Each concept clearly explained in a structured way with clearly illustrated charts. What more can one ask for? Great job!

[@sunnyclassroom24]

Great to hear!

[@gautamr366]

Simply brilliant explanation! Your channel is a boon for anyone looking for good CS fundamentals. Keep it up and hope you can publish topics on Core OS concepts as well?

[@abdullahshaheed4276]

Thank you so much Sunny, I always come back to your lessons. It's my favorite reference.

[@atvid2983]

Thank you sir, the pace and simplicity with which you explain concepts is commendable, when In doubt or want to learn about a subject, I search with Sunny Classroom #####, #### stands for whatever network related concept I am looking for, simple and Brilliant

[@moses5427]

Thank you for the clear and concise explanation as usual. Your videos taught me a lot!

[@Mastagon]

I can't say enough good things about Sunny Classroom.

[@FredoCorleone]

Best explantion ever. Sunny is better than Google's IT course in exaplaining NAT, no doubt.

[@parischarlievij4904]

Thank you Sunny! For putting a number of topics into perspective.

[@lltagged]

Quick, concise and very clear. Thanks!

[@scienceblossom6197]

I loved this video. Very high quality explanation.

[@sunnyclassroom24]

Thanks a lot or your nice comment.

[@vishalsharmahacks]

Very Nice Explanation. Watched Many. only now all confusions are cleared

[@michaeleaster1815]

Great video! Thank you... Though I believe 7:25 should be "is 16-bit value", not "16 digit value" ?

[@rufusmurphy9990]

A really good explanation, well paced and clear. Thank you

[@seshansesha7645]

Simple and easy to understand... thank you

[@StuffOffYouStuff]

Again, the best explained video I've seen on this. Your videos are excellent. I needed a refresh. I do have a couple of clarifying questions about this. 1) Dynamic NAT - what happens if all the public IP addresses are used up? Are internal hosts denied access to the internet then? 2) PAT - If an internal host sends an outgoing packet on port 80, but the gateway then translates that to port 8001, how does the web server on the internet know you are trying to communicate with it on port 80? Thanks, Sunny.

[@juanpasht]

Here is what I think: 1) Yes, they must be denied access until an available public IP comes out; and if not using PAT. 2) The port 80 of the internal host is NATed. The web server doesn't care about that port but the one that comes by 8001 where it will reply the request. The router-gateway receives by 8001 and translates to 80 to the internal host. The web server will never know you tried by the port 80, and doesn't matter.

[@dudinhtran3642]

Very useful video, easy to understand and remember. Great job! Many thanks!

[@sunnyclassroom24]

You are welcome!

[@saidaitbrahim2968]

Wonderful explaining my teacher. Thank you so much

[@18ShotErnie]

WE LOVE YOU SUNN!!!! THANKS FOR THIS... AND PLENTY OTHER VIDEOS. I REALLY VALUE THE THINGS YOUVE TAUGHT ME

[@premnathkangatharan2193]

Thanks for explaining the differences in the different types of NAT... i was a bit curious how the external unit would know where my request came from, but i think it is by using the PAT by default.

[@limichael1519]

Hi Sunny Love ur teaching videoes. Thanks for sharing

[@sunnyclassroom24]

you are welcome!

[@quisjourney3688]

thank you very much for the videos, so clear, so easy to understand. Hats off 🤩

[@DG-zu4iy]

That moment when you search on youtube and cross your fingers a video with Sunny shows up in the results feed- BINGO! oh Thank Jesus....press PLAY! 😂

[@devinwick5056]

At last I understood. Thank you sunny!

[@gustavolautenschlaeger9195]

Wonderful explanation and illustration. Thanks so much!

[@fahadoutlook1241]

you are wonderful teacher.

[@armandobarragang]

Sunny, simple and excelent explication. Thanks

[@sunnyclassroom24]

You are welcome!

[@umardelvi5715]

Very clear and concise explanation. Thank you Sir!

[@sunnyclassroom24]

You are welcome!

[@luthermaria1021]

You deserve more subscribers, this is awesome

[@ekonialancewanariu9049]

Short and sharp. I learnt alot within a short time. A question here please. If I'm using DNAT to connect, should I forget about PNAT? Or can I use them both simultaneously?

[@althafahmed5757]

Thats a Beautiful Explanation with some Graphics to explain

[@sunnyclassroom24]

Glad it was helpful!

[@althafahmed5757]

@@sunnyclassroom24 can you explain dmvpn the same way along with configuration? Is there a video tutorial already for dmvpn?

[@pattygq]

Excellent content as always. Thanks Sunny!

[@mr.b5678]

Best on the web explanation. thanks bud

[@muhammadhakim6038]

one word... AWESOME!!!!!

[@sunnyclassroom24]

Thank you for watching!

[@taddy666]

This is awesome! Thanks for the precision and detail, Sunny.

[@ashkanizadpanah9761]

Thanks Mr. for your great videos.

[@tomcat2512]

Thank you for this interesting video. It enhances my understanding of NAT. I realized that this video was made quite some time and CGNAT is not yet widely used back then. With the advent of the use of CGNAT by most ISP, it basically deactivates the use of port forwarding in a private network. Do you have a way around this? I would love to see another video on this topic. Thank you!

[@saltech2024]

Awesome!! You are so amazing tutor

[@sunnyclassroom24]

Thanks a lot!

[@thepawsupply1501]

Very good Sunny! Thanks for making this video

[@vinitshandilya]

How amazing this explanation was!! 😀

[@sunnyclassroom24]

Glad it was helpful!

[@Dertgyhud]

Excellent video!

[@sunnyclassroom24]

Thank you very much!

[@Helkenberg]

Excellent video. Extremelyt Informative. Subscribed!

[@mokodo_]

Your videos are amazing, thank you

[@naderreda2020]

This is the best video ...... thank you...

[@sunnyclassroom24]

Glad you liked it!

[@josecobo7179]

Hi Sunny, thanks for the video. On the PAT explanation, why a common PORT of 80 was chosen instead of a random port number also known as ephemeral port? thank you

[@derekwang9758]

Very clear video!

[@parostpg]

Excellent. Thank you.

[@sunnyclassroom24]

You are welcome!

[@alexmook6786]

Awesome explanations!!!!!!

Excellent explanation. Thank you.

[@ImmiTheKhan]

Awesome explanation Sunny, Subscribed!

[@rkoitsjohncena1258]

Very well explaination, thanks

[@sunnyclassroom24]

You re welcome !

[@mahathirgembul6044]

I wish you are my lecturer back then

[@sunnyclassroom24]

i wish too.

[@NicolaeCristian175]

thank you Sunny. Very good video.

[@sunnyclassroom24]

Thank you very much, Nicolae.

[@letdo3449]

very great explainations about this 🤗🤗🤗

[@tiruinternationalpublicspe4932]

Awesome Video Sunny , Well Explained !!!

[@akeelsalman7202]

Another perfect video... Thanks Sunny

[@ctsdeveloperx9248]

Great video! Thanks!

[@sunnyclassroom24]

Thanks you for watching!

[@janindubhanuka545]

Great work my friend..

[@sunnyclassroom24]

Thanks for the visit

[@sheffin007]

Well explained!

[@technics6215]

Thank you for very clear explanation. It would be nice if you could explain how these NAT types are made in real world. I mean iptables.

[@realtebo]

Really good video. If I understand well, what at my home I am doing in my router is only a simple port forwarding. SNAT and DNAT are used at ISP level? Or every home router is using ? and if yes,. .. can yuo explain me how?

[@erichillel4718]

Very clear, thank you

[@sunnyclassroom24]

Thanks a lot.

[@boblewis1287]

Very good Sunny

[@ЭльдарИсаев-ц1н]

i would like to say you that termin SNAT is not static nat , SNAT is source nat and DNAT is also destination nat! please be informed

[@ahmedalazazy]

شكرا يا هندسة :)

[@fahad_hassan_92]

Great explanation!

[@srinivasprusty]

all your videos are excellent

[@sunnyclassroom24]

It is very nice of you to say that.

[@ajazio]

(AT 4.30) DNAT does not deal with outbound traffic, it deals with inbound traffic. SNAT deals with outbound traffic

[@sajjadhaider9849]

Awesome Sir.Excellent !

[@sunnyclassroom24]

Thank you !

[@MRSa-tw6ut]

Very informative, many thanks.

[@te4683]

Love youre videos. Thx for sharing

[@arthurimona5901]

Great explanation. Thanks a lot!

[@0Alps0]

Very clear, many thanks~~