I want a software for safe pc  from adult content and and I want to install it only on main system and control all client systems (workstations).

as : "cyber patrol" software but it is not free and it is required installing on all client systems

if you know any software then send me link (free software)

if anyone know how to web filter on firewall easily? tell me and about any software.

Hi,

You need to use content filtering on gateway which dose not come free and if its free you will not have a good control.

Websence / Zscaler are some good ones