title: Why Wireshark display filter does not show http packets?
body: <p>When I use display filter for HTTP it shows only HTTP packets when HTTP message is on standard port i.e. on port 80. But, when message is not using standard port, then display filter not works for HTTP and I need to filter for TCP and then need to find out HTTP packets manually.</p>
  
  <p>I want to know why this happen? Is it standard behavior or I am doing (or expecting) it wrongly.</p>
  
  <p>Thanks.</p>