Methods and systems are provided for sharing information and improving the functioning of devices by blocking potentially harmful communications. In the methods and systems disclosed, a security component on an electronic device may receive a policy. The security component may also receive, from a local device proxy on the electronic device, information pertaining to a communication. The security component may compare the information pertaining to the communication to the policy. The comparison may result in a determination that the communication is potentially harmful. The security component may then instruct the local device proxy to block the communication from proceeding past the local device proxy.