I occasionally audit the open ports on my machine to make sure I fully understand my attack surface. When I did this today, I discovered that mtr was listening on a high UDP port (which seemed to change each time I ran).Does anyone know why this is the case?  I had a brief look at the manual and did some googling but I couldn't find a discussion of thisSteps to reproduce:run mtr 8.8.8.8 in one window, run in another sudo lsof -i udp | grep mtrUPDATE:To clarify what I mean my listening UDP port the output from lsof looks like thismtr      31791  user   8u  IPv4 221685      0t0  UDP *:39850
Why is my trace route (mtr) binding a UDP port when it runs?
udp;traceroute