Hi @Nauneuquech21
Which service are you trying to expose? I would like to build and test your scenario in my homelab.
Unlike TCP-Ports, port checkers cannot easily detect UDP ports, since there is no "handshake". A UDP port typically does not respond at all unless a valid application-layer payload is sent, which means that a port tester would have to be able to send a packet valid to the specific application.
Even when the port is closed, many firewalls drop the occurring ICMP error - also leading to "silence" on the wire.
What confuses me a bit:
I ran Wireshark and it looks like the server (sitting in my home) is sending packets, but the client (my PC) doesn't receive anything.
So both server and client are at your home?
The server initiates the traffic to the client?
=> If so - what OS are you running on the client? i.E. Windows will block random UDP traffic using its firewall.
Best,
r00t
