Edit the Sun Java System Web Server server.xml file so the listen socket on port 80 includes family="nca" as shown below (the server must be listening on port 80 for this to work):
<LS id="ls1" ip="0.0.0.0" port="80" family="nca" security="off" acceptorthreads="1">
Edit the Sun Java System Web Server nsfc.conf file and set the following:
CacheFileContent=falseTransmitFile=true
Restart the Web Server for changes to take effect.