i block a site by editing the hosts file, but users are using proxy sites and surf that site?
please help, is there any full proof method to block sites
You can not reliably block a site by management. There are a number of anonymous proxies and tools like Tor to automatically switch between them. His only hope is to filter the content – but still a site that uses the HTTPS protocol (note "s") will escape, because the traffic is encrypted in the user's browser and can not view the contents. You can block * all * HTTPS traffic – but this is usually not desired. You can try to install a content filtering software on the user's browser (or elsewhere on their computers) – but that is unreliable Also, because the user might be able to find and disable, unless the administrator rights are required to do so and can ensure that users do not have rights.
I2P Tutorial: How to Add Additonal Hosts
