title: Broadcasting a message using nc (netcat)
body: <p>I'm trying to send a broadcast message using netcat.</p>
  
  <p>I have firewalls open and sending a regular message like this works for me:</p>
  
  <pre><code>  host: nc -l 192.168.1.121 12101
    client: echo "hello" | nc 192.168.1.121 12100
  </code></pre>
  
  <p>But I can't get something like this to work.</p>
  
  <pre><code>  host: nc -lu 0.0.0.0 12101
    client: echo "hello" | nc -u 255.255.255.255 12100
  </code></pre>
  
  <p>Am I using the right flags? Note, the host is on Mac and the client on Linux. Can you give me an example that works for broadcasting a message?</p>
  
  <p>Thanks!</p>