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I have a port forwarded on my router, but when I try to connect from outside network, I see in the log section the WAN IP of local connection DSL, and not the source IP address of who connected to me.

A map of the problem A map of the problem

Router WAN settings screenshot Router WAN settings screenshot

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    looking at your image, where in the universe are you that you consider planet earth to be outside of all your devices? – barlop Feb 18 '18 at 11:00
  • why does your phone appear to have two public IPs 40.21 and 151.15 ? – barlop Feb 18 '18 at 11:02
  • it is only a representative image to make the problem understood, they are not outside the world, they simply reach the "outside world". The phone has only 1 WAN ip (40.21.5.120) and makes a connection request via remote desktop to ip 150.15.1.150 on port 3389. It is not difficult to understand .... – Roberto C. Feb 18 '18 at 11:27
  • Mobile phone as only 1 IP: 40.21.5.120. The remote desktop on screen is the outside request through port 3389 towards ip 150.15.1.50. – Roberto C. Feb 18 '18 at 12:14
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    hmm, according to this serverfault.com/questions/530886/… it seems maybe NAPT shouldn't replace the source IP.. in which case i'm not sure why your router is doing that.. If you look at the network traffic in Wireshark(a packet sniffer), do you see the Source IP of incoming traffic as being of your router? Do you have another router you can try? – barlop Feb 18 '18 at 14:11

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