title: Scala Play framework enable only certain filters
body: <p>I am trying to enable only one Play filter, while disabling other ones (like host filtering, or CSRF filtering).</p>
  
  <p>This is my <code>application.conf file</code>:</p>
  
  <pre><code>play.http.filters=&lt;filter that I am enabling&gt;
  play.filters.disabled+=play.filters.hosts.AllowedHostsFilter
  play.filters.disabled+=play.filters.csrf.CSRFFilter
  </code></pre>
  
  <p>It seems like after I've added the line <code>play.http.filters=&lt;filter that I am enabling&gt;</code> at the very beginning, the disabled filters got enabled again, as I see familiar error messages: </p>
  
  <pre><code>Illegal 'x-forwarded-for' header: Invalid input ':', expected listSep or 'EOI' (line 1, column 13)
  </code></pre>
  
  <p>What is a correct way of disabling certain filters and enabling certain filters in scala play framework?</p>