If I use the preconfigured P2P/File Sharing block in the Firewall, will this prevent access only to illegal file sharing sites - or will it also block legit sites such as Dropbox, Google, Amazon etc?
Do note that, the device will only inspect and look for blocked domain names on all HTTP traffic
For your information, web blocking categories reporting feature is in the product road map now. Whereby user are allow to known the URLs listed for each categories.
Please stay tuned.