Block Anonymous access to files

Hello,

Some how when we access to https://<host>/irj/portalapps/com.sap.portal.epcf.loader/support/epcfproxy.zip and https://<host>/irj/portalapps/com.sap.portal.epcf.loader/applet/epcf.jar we can access it without authentication. How can be block the anonymous access.

Regards,

Ann