I have Trend's IWSS and I try to use it with squid.

IE ----> Squid with cache ----> IWSS proxy----> Internet

I've configured Squid with options :

cache_peer parent @IP of IWSS 8080 7 no-query default
acl all src
never_direct allow all

With this configuration, I always redownloading my files and I don't use my
squid's cache. It's normal ?

Without this, it's ok. IE ----> Squid with cache ----> Internet

Bests regards.