We've been adding the following to the web.xml to restrict access to the JSS WebApp

<!-- Restrict Access to JSS via IP Address -->

<filter>

  <filter-name>Custom-RemoteAddrFilter</filter-name>

  <filter-class>org.apache.catalina.filters.RemoteAddrFilter</filter-class>

  <init-param>

    <param-name>allow</param-name>

    <param-value>"REGEX_IP_VALUES"</param-value>

  </init-param>

  <init-param>

    <param-name>denyStatus</param-name>

    <param-value>404</param-value>

  </init-param>

</filter>

<filter-mapping>

  <filter-name>Custom-RemoteAddrFilter</filter-name>

  <servlet-name>PresentationLayerServlet</servlet-name>

  <servlet-name>FrontEndController</servlet-name>

  <servlet-name>FrontEndUploadController</servlet-name>

  <servlet-name>RestletServlet</servlet-name>

</filter-mapping>

But since upgrading to 10.6 this seems to have stopped working.
Has anyone else doing something similar with 10.6?

Thanks.