get sender IP on UDP server?

[bowlofred]

Looks okay to me. I wonder if you have some strange networking going on. Unprompted UDP like this shouldn't be subject to NAT, but I have no other explanation. It works fine on my machine. The only change I made was to bind to all addresses so I didn't have to hardcode my IP.

...
if __name__ == '__main__':
    UDP_IP = "0.0.0.0"
    UDP_PORT = 5005
...

Client:

Output:
$ ip -br addr show dev eth0 scope global
eth0             UP             10.0.0.10/24
$ echo -n "Test UDP message" > /dev/udp/10.0.0.209/5005
$

Server:

Output:
From: ('10.0.0.10', 58743) received message: b'Test UDP message'