Free CCNA | NAT (part 2) | Day 45 | CCNA 200-301 Complete Course

I just want to make sure i'm not tripping here, maybe its because I mainly work with asa's and don't get to use routers as often as I like. But wouldn't B and C both work on question 2? I know it wants you to use a wildcard mask, but wouldn't it take the regular mask if you issued that command and just correct it when it applies it? Just want to make sure I'm not having a cisco mandela episode over here lol

But what happens if the destination host is also located behind a router that performs NAT ? Meaning how would hosts of R1 reach the hosts of the other router which is also performing NAT for its own hosts ? We can‘t use Private Address of those hosts as they won‘t be carried over the internet. and we can‘t use public address because how would the receiving router know which host the traffic belongs to. Can someone help me how it would work in that scenario ?

Hello, is it possible to configure Nat Dynamic and Dynamic Pat on the same router at the same time?

Best course

Really enjoying these videos. Question, if one configures PAT on the interface, does that mean that if one's ISP is dynamically assigning leases to your router every 24 hours then NAT on the router will just change the inside global address automatically to reflect the new DHCP lease from the ISP?

woah! NAT really feels like it ties everything together from the course so far. so cool!!

Hi Jeremy, I would like to ask something about dynamic NAT, supposed the source address is not permitted by the ACL, the source address wont be translated by the router but the packet wont be dropped, does this mean the private source address will be travel around the global network or there is some kind mechanism that will reject this packet with private source address? Thankyou in advance

So, as I understand after watching the 2 NAT Videos, all mid to large size companies will use the PAT, instead of NAT, right?, since "matching" Internal IPs with Public IPs could be considered a "waste" of resources.... Am I right?. Great Explanation as Always Jeremy, thanks for that (y)

like if you watch the videos in x2 speed and managed to learn it all in a 4 days

Best teacher

may 1st is my test date, cant wait to get certified!

Just a quick note that question number 2 on the quiz has a Deny line allow for answer A. Making it extra incorrect.

Thanks jeremy! is PAT also part of the exam ?

Hi Jeremy, you know if in this year, the exam Cisco 200-301 include laboratories for configure commands? thanks

Will you make NAT videos for CCNP level?

Thanks Jeremy

I will wait AWS full course.

thanks alott

Sir,
In Quiz 5, when ACL denies a subnet and packets from that subnet won't be neither discarded nor translated what would the router do with those packets???
If the packets couldn't be forwarded isn't it better that the packet be dropped??

Great video Jeremy. One question: Are Dynamic NAT and PAT subtypes of Source NAT, just like Static Source NAT?

And routing protocol

Please do firewall courses also

Very helpfull tutorial❤️

Hey Jeremy, do you speak Japanese? and can you work overseas as a network engineer with a CCNA?

Hy, Jeremy!
1)In a real world scenario, it is necessary to use an ip address for inside global from range that ISP give we?
2)In your diagram example why the ISP router don't drop your traffic, i see you use a ip address for inside global that isn't in range of external network?

Thank you Jeremy!

Every subject I think I have fully down I watch one of your videos and find something I overlooked. Great videos.

Particularly the way you show how the router translated the source port to track the host.

diabolical detail to help you decide whether the question is about PAT or ordinary NAT. notice the ephemeral port number after inside global: 49912 for the netsim question. that's a dead giveaway that the question refers to PAT and not simple nat.

Hi Jeremy,
In quiz question 2 you say the reason option a is wrong is because the mask and range in line 2 doesnt match.
But, in line 1 it also says deny instead of permit, doesn’t that also make it wrong?

Man you are the best, I just finished to learn from the Two Volumes on CCNA 200-301 books, but your explanations are the best! Now it's more clear for me! Thank you very much, God bless you and your family!

It was said that packets sent by addresses that are not in the pool will not be dropped. My question is what will happen to the packet?

For question 2, you missed the most obvious elimination factor for A (its ACL is set to Deny)

Can we configure Named ACL for PAT? If yes, what is the command ?

Best CCNA course ever.. I am truely wish you all the best

For question2, I thought since the acl was set to deny, thats the reason for it to be incorrect. Is this reason Ok?

Until now, NAT and PAT were my weakest points for CCNA. Now, with your explanation, I feel more confident for the exam. Thank you so much, if I pass the exam, I will really appreciate your help!

Hey Jeremy, awesome course, really teaching me a lot! Just wondering what happens to a packet that isn't translated but isn't dropped? Does it still fly off into the ether but just has nowhere to go?

If anyone wants some more details on why "your ISP will drop the packet"
Here they are;

When you own/rent a public subnet from an ISP, that subnet is routed to only you.
That's why the internet works, every continent has an organization who has a range of IP's, those IP's are redistributed to ISPs, and ISPs distribute them to customers, and make the public networks using routing.

Private IP's are not routed anywhere over WAN because they are private IP's. Nobody owns them. Your ISP will drop the packet because the ISP's router doesn't have any routes for the private IP ranges.

This explanation is also quite simplified, but i think you get the picture.

To demonstrate this in these labs, Jeremy has just not added routes to the RFC1918 private ranges on the "ISP/Internet" routers.

Hi Jer
you keep saying packets not allowed by the ACL will not be translated and not discard too. So what will happen to those packets? Just curious.

🥋🏈Jeremy Boss

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