I do not normally comment on videos , but as most of the viewers may agree with me , you deserve more subscribers. Your explanations are by far one of the best ,even better than what they call industry experts. Keeping it simple and one explains one thing at a time makes it pretty stress free to watch and understand. Keep it up and I'm looking forward to see more advance networking concepts simplified.
This is a really great video. Im working on getting my CCNA and this really helped me understand how NAT works after school. thank you for the solid and slow paced information to let it sink in.
This is the first video I've seen that properly explains NAT. Most others are too superficial and skip some details that are crucial to understand for the system to logically make sense.
I am watching this because my class was cancelled because our school is closed because of the virus, therefor our teacher can't explan the content so he sent as the video.
Thank you!!! Your videos are below 10 minutes and in this short time you gave the concrete concept and so much information indeed . Thank you again.....
Thanks. I understood the concept of NAT strongly now and why it is important. Also, I know types of NAT like PAT NAT and static NAT and dynamic NAT. Great and useful video. Keep up with these good staff.
Great video., NAT simplified. i recommend this video to anyone struggling to understand this concept. Kindly do more of this video. the graphics, explanation and top notch
Glad I stumbled upon this channel. I'm setting up render servers at my office to connect to over VPN from home, with a pfSense server, but I had very limited understanding of why I had to do some things and how these things worked. So it's good to get some more background, I already understand alot more. Great work!
Thanks, I appreciate it! Most of it is rather outdated actually! And keep up the good work, I like the visual part of the explanation. People have told me about alot of network related stuff but this makes it much more clear to me.
Nice video, but I have a hole in my understanding.... if the router swaps the private address for a public address as shown, how does that solve the issue of there not being enough public addresses? surely some other router somewhere is using the same public address in it's "pool".
i really appreciate your teaching skills, simple and effective direct to the point. i will really love more of your videos you got a new fan. if you have stuffs on CCNA recent stuff or even exam dumps please just send me the link thanks
Thank you for the explanations on the different types of NAT. The second edition of Information Security: The Complete Reference by Mark Rhodes-Ousley does not explain the concepts thoroughly enough for me. The sections of PAT,dynamic NAT, and static NAT were a little too brief. Your video broke it down just enough for me and the added visuals will help me to remember the particulars.
Awesome tutorial. What about “open” nat. I remember years ago my xbox would struggle with multiplayer connections because it said my nat was not set to “open”.
Hi ! Thank you ! I finally understood how NAT works :D Just one thing, Dynamic NAT is a many to many mapping addresses not a one to one, that's according to ICND1 documentation ^^' Keep going ! :D
What if I have multiple computers in private need to access to internet, as I have only one public IP from my ISP, how would be the NAT table? Thanks for your great explanation!
Great video! Thank you!. When you said data can be even be send to the tab? Do you mean the router sends it to the tab? And if so how? - by attaching supplementary data like a "port extension" stored in the NAT? which the browser attached initially? Could anyone explain?
Excellent explanation, nicely illustrated. I'd like to know more about NAT when multiple routers are involved. Does it matter where NAT resides? That is, should it be on the internet facing router, or can it be on a router behind the internet connecting router? Perhaps that would mean the internet facing router can't provide NAT to other devices it serves, such as an IPTV box? I hope you can clarify for me. Thanks again for your quality videos, I'll study them for more insights.
Thanks Geoff! Generally speaking you would use NAT on the internet facing router to convert your private IPs to public IPs. You can use NAT internally if needed. Really it just depends on the situation.
CertBros thanks for your response. Does having NAT enabled for both (outward and inward facing) routers introduce issues? The LAN IP for each, in my case, is separate (192.168.100.1 and 90.1), with the internet facing router acting as gateway to the internal router. Grateful for any guidance.
Yes double NAT is possible but if I understand the situation right then it's not needed. You just need NAT to covert the private IP to public. The internal router will be able to route the traffic between the connected internal (.100 / .90) subnets.
Thanks once again, your interest and response is much appreciated. FYI, I experimented with disabling NAT on the internal router and communications basically stopped, so I enabled it again and for now will leave well enough alone. My next challenge is to get access from the internet through the primary router to the internal router that connects a Windows Server 2008 R2 instance. I'm fiddling with port forwarding and Windows Firewall to get through but it's stretching my knowledge. If you have any videos or can make one on this subject that would be great. Thanks again and regards.
Ah OK. This will most likely be because the internet router cannot route the traffic back to the internal routers LAN. A static route could resolve this but if you are happy with the double NAT then leave it like that. You will need to port forward from the internet router to the internal router, then from the internal router to the server. You may also need a DDNS record if you public IP is dynamic.
Great video! Would it be correct to say that the key difference between PAT and static NAT is the router building the NAT table vs manual configuration of the NAT table?
Would like you to make a video on how we can use routers on cloud. Like that bring your own license concept. What is that. Tried finding videos and information on that topic but didn't find. Hope you make a video on it. Love from India❤
Good suggestion Aditya! It pretty much means you can spin up a router/firewall/other device in the cloud and use a license that you have purchased from the vendor.
Great vid - there should be more like this one - I like the way the facts about the process are cross referenced to their real world applications - A lot of IT vids miss this and you end up not really understanding where the info actually fits in the real world. Should have more views.
Loved the video! Do you think you can explain masquerade? Also, can you make a video just like this explaining firewall rules and how they work. E.g. like what’s the difference between related established invalid and new etc. I️ own a edge router, and I’m slowly trying to teach myself how to write firewall rules. Also, QoS would be awesome as well!!! Thank you, Throdne
Thanks Throdne! Masquerading is pretty much the Linux word for Overload/PAT in this video. I'm assuming your firewall is based on Linux so you likely have a SNAT (changes the source address) and DNAT (changes the destination address) option as well. Definitely going to do some security videos in the future!
Hello sir...nice demo...one thing i would like to know if you could tell me...my question is by anyhow dynamic ip could be responsible for NAT TYPE 3 or strict
great video👍🏻 but i have a question. Lets say if i have 2 devices in private network, and they use the same public network, is there a conflict? or it is usual?
I do not normally comment on videos , but as most of the viewers may agree with me , you deserve more subscribers. Your explanations are by far one of the best ,even better than what they call industry experts. Keeping it simple and one explains one thing at a time makes it pretty stress free to watch and understand. Keep it up and I'm looking forward to see more advance networking concepts simplified.
Thanks Yohan. Appreciate the comment. Glad it helped you out.
This is a really great video. Im working on getting my CCNA and this really helped me understand how NAT works after school. thank you for the solid and slow paced information to let it sink in.
Good to hear this video helped you out. Thanks for the comment!
This is the first video I've seen that properly explains NAT. Most others are too superficial and skip some details that are crucial to understand for the system to logically make sense.
By a guy with no IT background at all: already on my sixth video today. Very clear text, good voices, excellent animations. Thanks a lot!
Thank you Rik! Really great to hear your enjoying the the content.
I am basically a dumb person, but mate, you make me feel intelligent and that is priceless for me. Thanks a ton and cheers!
The pinky second finger yesterday was fake thats why they deploy bey cap cover for bullshit 😭 aslong as people make money who cares
I got a computing exam coming up, this video explained it flawlessly compared to the notes. Appreciate it bro! also subscribed :))
This is a solid explanation of different types of NATs. It has helped me solidify my understanding! Thanks.
Thanks Ray!
Dude, this guy's voice is so calm I almost fell asleep watching this.
you explained better than any video on youtube ive checked so far.. thx
Thanks!
the best explanation I have ever had
In this stupid game the only real fake Jesus is me 😂
If anyone needs an attorney let me know I can find them counters with TH-cam in court 😭😂
You made it so easy to understand, as I read some articles and find myself scratching my head again n again ... Thank you
You're welcome Nilesh! Happy to help 👍
0:26 start -- thanks for the video!
I am watching this because my class was cancelled because our school is closed because of the virus, therefor our teacher can't explan the content so he sent as the video.
Thanks! It's really great to hear these videos are helping people during this time!
because its closed becaused u want to study u watched it because u want to learn.
Nothing like being supplied free content for a class your paying for... lol
@@FoX84tac022 I am not paying for it education in Austria is free
@@schrodinger6991 Well fuck me xD
Thank you!!! Your videos are below 10 minutes and in this short time you gave the concrete concept and so much information indeed . Thank you again.....
Thanks for the comment! I try and keep these videos as short and simple as possible so it's good to hear its working.
This video is a marvelous explanation of NAT, one of the bests I have ever seen. Well done
You took a somewhat mystifying concept and made it very easy to understand! Thanks!
Thanks Jim!
Thanks. I understood the concept of NAT strongly now and why it is important.
Also, I know types of NAT like PAT NAT and static NAT and dynamic NAT.
Great and useful video.
Keep up with these good staff.
Thats the skill, How beautifully he explained NAT.
Great video., NAT simplified. i recommend this video to anyone struggling to understand this concept. Kindly do more of this video. the graphics, explanation and top notch
mate your videos are really good. your animation and voice really help simplify the essays ive read in CCNA books. thanks !
Thanks Jit! Happy it helped
After 2 or 3 days I got exact information what I am looking for thank u so much
Great to hear it! Thanks for watching.
The world's best teacher
Thank you for a carefully explained short clarification!
6 years since this video was published and i can confirm that it is still a great video
You explain with very clear and with example. Thanks.
Glad you liked it 👍
If possible can you please make videos for CCNP. It will really helpful to us and we don't need to anywhere for this.
Glad I stumbled upon this channel. I'm setting up render servers at my office to connect to over VPN from home, with a pfSense server, but I had very limited understanding of why I had to do some things and how these things worked. So it's good to get some more background, I already understand alot more. Great work!
Glad to hear the videos have helped you out! It's always great to get these comments.
Nice intros by the way!
Thanks, I appreciate it! Most of it is rather outdated actually! And keep up the good work, I like the visual part of the explanation. People have told me about alot of network related stuff but this makes it much more clear to me.
@@EcripArts what’s your job tittle now
@@ausmanx1161 Due to illness, unfortunately nothing anymore. I used this for building a render farm for my 3D work.
my textbook overexplains tf out of everything so thanks for this bud
It is really short & simple explanation to understand it easily.
Especially the slides representations helps a lot to understand.
Thank you!!😊
Thanks Nikhil. Happy it helped you out.
the best material for networking!!
Thank you! Glad you like it.
Nice video, but I have a hole in my understanding.... if the router swaps the private address for a public address as shown, how does that solve the issue of there not being enough public addresses? surely some other router somewhere is using the same public address in it's "pool".
As a new IT student I have no fucking clue what I just watched, but I’m sure I’ll come back to it
Sure this might be a bit much to start with. Come back when you ready.
you are still replying, great and good video helped me for my assignments :)
I try to reply to all comments if I can. Glad you liked the video and good luck with the rest of your assignments.
This is the first time i have been able to understand this NAT lecture. Thanks a lot. Please do you have a video on IS-IS and BGP configurations
Again, Best explained video's on the net!
Thanks Niels
i really appreciate your teaching skills, simple and effective direct to the point. i will really love more of your videos you got a new fan. if you have stuffs on CCNA recent stuff or even exam dumps please just send me the link thanks
keep it up, good explaination.
Thanks!
Thank you for the explanations on the different types of NAT. The second edition of Information Security: The Complete Reference by Mark Rhodes-Ousley does not explain the concepts thoroughly enough for me. The sections of PAT,dynamic NAT, and static NAT were a little too brief. Your video broke it down just enough for me and the added visuals will help me to remember the particulars.
Happy to hear it helped and thank you for commenting. Good luck with your studies!
very good and fast explanation of how NAT works. :)
Thanks TeX!
I got an exam about this tomorrow and I'm so thankful for your good explanation. :)
How did the exam go?
@@Certbros he got a 0
Awesome tutorial. What about “open” nat. I remember years ago my xbox would struggle with multiplayer connections because it said my nat was not set to “open”.
Wow, finally I understand what NAT meant Big thanks, so good!
Happy to help! Thanks.
Thanks for the solid and precise explanation.
Very welcome!
You deserve more subscriber , good animation make concept simple ,hope for more content coming
Really appreciate the support Wind Luo! A lot more content planned in the very near future.
Legend. Great teaching style. Thanks for the video.
Truly amazing! Just got what I was looking for. Please keep uploading such wonderful, crisp and informative videos in the upcoming time :))
Thank you Atharva. More to come!
excellent quick NAT explained, love it. Thanks
Thanks Don!
Great explanation! Keep the good work up. Highly appreciated!
+Hussein Jasin FIRST COMMENT! Thanks!
Amazing explanation . I got it on the first go
Thanks! Glad it helped you out.
thank you very much dude! very simply and well explained!
Thanks Pantelis! Appreciate it 😁
This was great. I would recommend updating the overall style of the video as far as graphics, but otherwise, I understand NAT now. Thanks CertBros!
Thanks. This is a bit of an old video now
Hi ! Thank you ! I finally understood how NAT works :D
Just one thing, Dynamic NAT is a many to many mapping addresses not a one to one, that's according to ICND1 documentation ^^'
Keep going ! :D
I realised he confused NAT and Dynamic too there!!
Great video nonetheless, it really helped clear this out for me!
Static*
A pool is basically a really wide and flat bucket :D Great video
Yes it is! It's a deep and narrow pool! haha.
What if I have multiple computers in private need to access to internet, as I have only one public IP from my ISP, how would be the NAT table?
Thanks for your great explanation!
Cheers mate, simple but very effective !
Thanks for the support!
great video. looks simple but all the required content in place.
Very well done lads.
Thanks Zi0!
Best explanation I've seen so far.
Thanks Mert
Thank you so much. Fantastic explanation!! 10/10
Great video! Thank you!.
When you said data can be even be send to the tab? Do you mean the router sends it to the tab? And if so how? - by attaching supplementary data like a "port extension" stored in the NAT? which the browser attached initially? Could anyone explain?
Nice Explanation . Thank you so much !
Thanks!
Mine has a lot going on. Thank you!
Nice, feel like a genius now, really appreciated
Haha! You are a genius now!
smoothly DONE !!!
Thanks!!
thank you sir, you saved me a lot of time.
You're welcome!
Excellent explanation, nicely illustrated.
I'd like to know more about NAT when multiple routers are involved. Does it matter where NAT resides? That is, should it be on the internet facing router, or can it be on a router behind the internet connecting router?
Perhaps that would mean the internet facing router can't provide NAT to other devices it serves, such as an IPTV box?
I hope you can clarify for me.
Thanks again for your quality videos, I'll study them for more insights.
Thanks Geoff!
Generally speaking you would use NAT on the internet facing router to convert your private IPs to public IPs. You can use NAT internally if needed. Really it just depends on the situation.
CertBros thanks for your response. Does having NAT enabled for both (outward and inward facing) routers introduce issues?
The LAN IP for each, in my case, is separate (192.168.100.1 and 90.1), with the internet facing router acting as gateway to the internal router.
Grateful for any guidance.
Yes double NAT is possible but if I understand the situation right then it's not needed. You just need NAT to covert the private IP to public. The internal router will be able to route the traffic between the connected internal (.100 / .90) subnets.
Thanks once again, your interest and response is much appreciated. FYI, I experimented with disabling NAT on the internal router and communications basically stopped, so I enabled it again and for now will leave well enough alone.
My next challenge is to get access from the internet through the primary router to the internal router that connects a Windows Server 2008 R2 instance. I'm fiddling with port forwarding and Windows Firewall to get through but it's stretching my knowledge.
If you have any videos or can make one on this subject that would be great.
Thanks again and regards.
Ah OK. This will most likely be because the internet router cannot route the traffic back to the internal routers LAN. A static route could resolve this but if you are happy with the double NAT then leave it like that.
You will need to port forward from the internet router to the internal router, then from the internal router to the server. You may also need a DDNS record if you public IP is dynamic.
Fantastic explanation!!
Great video! Would it be correct to say that the key difference between PAT and static NAT is the router building the NAT table vs manual configuration of the NAT table?
Would like you to make a video on how we can use routers on cloud. Like that bring your own license concept. What is that. Tried finding videos and information on that topic but didn't find. Hope you make a video on it.
Love from India❤
Good suggestion Aditya! It pretty much means you can spin up a router/firewall/other device in the cloud and use a license that you have purchased from the vendor.
Thank you very much for your lecture.
You're welcome! Thanks Omar
I love you guys for this.
Love you too man! 👊
pretty good explaination
Thanks!
Great vid - there should be more like this one - I like the way the facts about the process are cross referenced to their real world applications - A lot of IT vids miss this and you end up not really understanding where the info actually fits in the real world. Should have more views.
Actually! Real world examples help a lot
As usual.. Certbros rocks!!!!
Thanks!!
Thanks for the video. but what happens if two different internal private IP's use the same port? how does the NAT decide which packet goes where?
For what I understood, the port will be changed as it says in the video, if a port is already being used, it will take the next available one.
Just wanted to say thanks for these very helpful videos! :)
You're welcome! Thanks for the comment.
Thanks I learned a lot very well explained.
Thanks
Good Explanation
Thanks!
This was fantastic, well explained :) Will definitely be reviewing more videos
Thanks Kuvisha
Thanks for the explanantion, extremely useful
Simple is better, perfect !
Thanks Ronaldo
i am from bangladesh ...it is very usefull for us...
Great job 👍, please keep such wonderful videos coming.
Thanks
Thank you Ayesha!
Excellent explanations 🔥🔥🔥
Loved the video! Do you think you can explain masquerade? Also, can you make a video just like this explaining firewall rules and how they work. E.g. like what’s the difference between related established invalid and new etc. I️ own a edge router, and I’m slowly trying to teach myself how to write firewall rules. Also, QoS would be awesome as well!!!
Thank you,
Throdne
Thanks Throdne! Masquerading is pretty much the Linux word for Overload/PAT in this video. I'm assuming your firewall is based on Linux so you likely have a SNAT (changes the source address) and DNAT (changes the destination address) option as well. Definitely going to do some security videos in the future!
Very well explained
Hello sir...nice demo...one thing i would like to know if you could tell me...my question is by anyhow dynamic ip could be responsible for NAT TYPE 3 or strict
excellent explainations
Thanks!
I think you should teach on U
demy, you are so good, please make as many videos you can!
Thanks Pavel! If the support keeps coming, so will the videos!
great video👍🏻 but i have a question. Lets say if i have 2 devices in private network, and they use the same public network, is there a conflict? or it is usual?
Depending on the type of NAT being used, both devices will use the same Public IP address. NAT will keep track of this and separate the traffic.
@@Certbros thank you 😁
3:56 "Now the port number is very imPORTent here", I see what you did there mister
Great video man! Thanks much
You are amazing bro !! Why did you stopped to make new videos ???
Thanks man, appreciate it! Lots more videos are in the making and even more planned. 2018 should be a good year for us!
Nice voice, great explanation - you've earned your subscribe!
Thanks! Appreciate the support 👌
Please also upload PAT Port Forwarding Explained in details for this Cisco Router.
Very nice vid made it easy to understand
Bro you a legend
Hi, could you please upload videos about router interfaces?
Do you mean the like the difference between different interface types?
Could you make more videos which cover the CCNA topics ?
On the way. Stay tuned.
4:43 I think there is a small mistake that port 8897 from the table is not the same with source port bellow (8879)
Good spot! You passed the test!
Not really, its a typo.
Thanks man.
I am curious, thx for explaining this :)
No problem! Glad you liked it!