======Hear your Firewall======
[[http://wiki.splitbrain.org/pling|Source]]

This little script watches the ''/var/log/kern.log'' for the string ''[FW] default'' which is logged by my firewall when dropping a package. For each map a little beep is sent to the pc speaker.

You need ''beep'' for it.

  #> apt-get install beep

<code bash>
#!/bin/sh

tail -f /var/log/kern.log | \
 awk '
   $0 ~ /\[FW\] default/ {
     match($0, / DPT=([0-9]+) /, matches);
     port = matches[1];
     print port;
     if (port < 1024) {
       system("beep -f 500 -l 100");
     }else{
       system("beep -f 2000 -l 100");
     }
   }
 '
</code>