Last Mikrotik youtube video about Hairpin NAT

RouterOS General
1

Hi everyone,

I think that I finally got how Hairpin NAT works thanks to users like @sob and @anav especially, and a few articles about the same topic (Mk wiki and Gred Sowell’s among many) which confirmed that I had got it right.
I also set it on my Mikrotik device and it works as expected.
Anyway, I watched the last Mikrotik youtube video about the Hairpin NAT, and I found the last point (n.4) a bit confusing.
What do you think about it?
Thanks

2

What are you writing about?
Do you expect that we know what “..the last Mikrotik youtube video about the Hairpin NAT..” means?
I even asked my professional “gues what the question was about” tool and I didn’t receive any answer :slight_smile:
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3

Sorry, I thought it was quite clear.
This is the video:

https://www.youtube.com/watch?v=1I5FywY6opQ

The part I found a bit confusing is:

“.., and puts the original destination IP address of 10.0.0.3 into the source IP address field, and the original source IP address of 172.16.16.1 into the destination IP address field”

puts the original destination IP address of 10.0.0.3 into the source IP address field???
Should the original Destination IP be 172.16.16.1?

Kind of “lost in translation” or am I misinterpreting here?
Thanks

4

It’s a bit confusing and also wrong. Response packet from server will first have 10.0.0.3 (real server’s address) as source and 10.0.0.1 (router’s address) as destination. And after all NAT is undone, it will have source 172.16.16.1 (server’s address as seen by client) and destination 10.0.0.2 (client).

We taught you well. :slight_smile:

5

Since I still consider myself a total noob (and I actually am) I first thought that I was missing something, so I wrote “confusing”, but by reading and watching the video more times, I started thinking that there might be really something wrong with the text and the explanation in the video.

Thanks :wink:

6

for me the confusing statement was this “after all NAT is undone”
why that happen..? can you tell me how this smart small device deal with this rule..?

7

Please don’t post the same thing in different sections, you already have a topic about this