title: Printer suddenly starts and prints message from libwww-perl
body: <p>We have a network printer that will suddenly fire up and print five lines (three times this month)</p>
  
  <pre><code>GET / HTTP/1.1
  TE: deflate, gzip;q=0.03
  Connection: TE, close
  Host : &lt;printer IP&gt;:9100
  User-Agent: libwww-perl/6.13
  </code></pre>
  
  <p>I'm guessing that something is scanning ports, but don't know where it's coming from  - it only identifies the printer IP address. The network is all cable, no Wi-Fi enabled...</p>
  
  <p>Any idea what could be doing this, and how it can it be located?</p>
  
  <p>The printer is an old (probably 15 years at least) HP Colour LaserJet 4500N with it's own network card and will reply to a ping request from anywhere on the internet...</p>
  
  <p>Thanks</p>