Blocking usually applies to , not the entire Google Sites domain.
Firewalls view sites.google.com as an essential educational or corporate asset. Banning the root domain would disrupt legitimate classrooms, portals, and projects. unblocked google sites
Google uses universal HTTPS encryption. Standard web filters can see that a user is visiting Google Sites, but they struggle to parse the specific URL path or the embedded elements inside the page. Blocking usually applies to , not the entire