Design of a dynamic rules firewall to block avoidance internet censorship systems based on proxy

Within the policies of an organization could find the not to allow users to access sites on the Internet for entertainment or social networks, as in the case of production organizations and educational therefore a firewall that is used implemented certain rules based on the policies of the organization, blocks access to certain defined sites while you let others. However as has not been implemented rules to block proxies of Avoidance Internet Censorship Systems, the user can access them easily proxies. The addresses of these proxies change very frequently, so it is almost impossible to block them all, and eventually they appear more. The proposed solution is to create a firewall that uses dynamic rules, these rules creates dynamic firewall itself. A test of each address to a destination is made and if it finds that the destination is a proxy of one of these systems evasion; the firewall creates a new rule and automatically implemented. In this way the user will lose access to the proxy avoidance.