title: Unable to upload signature to remote server using `fileTransfer` plugin in ionic but works fine in local server
body: <p>I am using <code>fileTransfer</code> plugin to upload signature in my ionic 2 app. To capture signature I am using <code>angular2-signaturepad</code>. </p>
  
  <pre><code>let options: FileUploadOptions = {
      fileKey: 'file',
      fileName: 'Order_'+this.order_data.order_id+"_"+this.order_data.order_type+".png",
      headers: {},
  };
  fileTransfer.upload(this.signaturePad.toDataURL(), 
  this.api+'php/wd_upload.php?location=signs', options)
      .then((data) =&gt; {
        // success
      }, (err) =&gt; {
        // error
      });
  </code></pre>
  
  <p>The above code works fine in local server, and signature is uploaded successfully. But when I try to change this api to refer remote server. This file transfer failed with following error</p>
  
  <pre><code>body: "&lt;head&gt;&lt;title&gt;Not Acceptable!&lt;/title&gt;&lt;/head&gt;&lt;body&gt;&lt;h1&gt;Not Acceptable!&lt;/h1&gt;&lt;p&gt;An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;"
  code: 1
  exception: "http://&lt;remote_server&gt;/php/wd_upload.php?location=signs"
  http_status: 406
  source: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAADICAYAAABS39xVAAAYsElEQVR4Xu2dXXBVVZbHd4QmCfMyScq ...."
  target: "http://&lt;remote_server&gt;/php/wd_upload.php?location=signs"
  </code></pre>
  
  <p>Please solve this problem ? </p>