Why am I not receiving UDP Packets sent to my own IP?

I just used your very code and the problem is you're not binding to a specific IP address. I don't know about Linux but on OS X there's an issue where sometimes the default will attach to an unused IP6 address rather than the interface you were expecting.

I just used your very code and the problem is you're not binding to a specific IP address. I don't know about Linux but on OS X there's an issue where sometimes the default will attach to an unused IP6 address rather than the interface you were expecting. Changing "" to 192.168.1.255 on the server, and including "192.168.1.255" on the bind in the client made all this work for me :).

UDPSocket. BIND takes a host and a port. Try changing the nil to your IP address.

From coderrr.wordpress.com/2008/05/28/get-you...; use require 'socket' def local_ip orig, Socket. Do_not_reverse_lookup = Socket. Do_not_reverse_lookup, true # turn off reverse DNS resolution temporarily UDPSocket.

Open do |s| s. Connect '64.233.187.99', 1 s.addr.last end ensure Socket. Do_not_reverse_lookup = orig end to get your IP.

This will send directly to the local computer and will help diagnose the problem further.

I think that's an issue only with Windows, and only when you're attempting to sniff packets on 127.0.0.1. At least in my experience. – MattC Aug 25 '09 at 13:18.

If such a connection is supposed to work, and you see the packages using Wireshark, then you should also check the software firewall on your machine. If it blocks traffic to the UDP port you want to use you can still see the package using Wireshark!

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