I can see forwarded port on canyouseeme website, but not on NMAP scan?

I have forwarded port 14444 using my routers configuration panel.

Here is the screen-cap:

Then I ran ncat using:

sudo ncat -k -l 192.168.15.42 14444

says "Success: I can see your service on 139.190.16.59 on port (14444)"

Here is the screen-cap:

But when I run NMAP against the public IP(the same IP as above) it says:

Not shown: 14444 closed ports

PORT STATE SERVICE

53/tcp open domain

And to make matters even more complicated, running NMAP against my Local IP says port 14444 is open:

Not shown: 14444 closed ports

PORT STATE SERVICE

14444/tcp open unknown

Here is the screen-cap:

I am so confused.

1 Answer

All fine. Canyouseeme shows port open on public address.
But when you run nmap, you in local network, so it shows port open on local ip.
If you run nmap from some remote server, it will show open only on public ip.

1

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