No, to use our service you don't have to install any software on your computer. The service can be set either on your computer or on your router, or server or mobile device (tablet or phone).
For your convenience, we have roaming agents for Windows and Linux which can be installed on your computer. It helps to use our service in the NATed network or in case if you move with your computer, from one network to another. This piece of software also has some special features like binding filtering profiles with different computer users.