Getting IP address and Port from UDP Packet

Question

I have a server set-up with netcat:

nc -l 4444 -u

And a client:

nc 127.0.0.1 4444 -u

I am using localhost because they are both on my computer, but if the client moves to another computer, is there a way for netcat to tell me the ip address and port number of the client?

Anjanetteanjela

Answer 1

Use the -v or -vv for verbose logging, that will tell you client IP and port.

Mintun

when I add -v to it but that does not seem to be working, I do not know if this matter but I am running it on a mac, I had to change localhost to 127.0.0.1 because localhost has stopped working altogether. – Anjanetteanjela

Yes, BSD variant does not tell you that. Try GNU netcat (netcat.sourceforge.net) if you are so inclined. – Mintun

same problem in windows if using Cygwin... solved using nc.exe from v1.12 NT eternallybored.org/misc/netcat – Flock