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<p>Your browser doesn't support frames Please upgrade your browser to take advantage of all features of <a href="http://www.firewall.com/" target="_top">www.firewall.com</a>. </p> <p>Click on the link to proceed to <a href="http://www.firewall.com/software/arnudp.c" target="_top">arnudp.c</a> - Source code demonstrates how to send a single UDP packet with the source/destination address/port set to arbitrary values.