There is a need to set up an open WiFi network within a college campus. It is essential that all types of adult content and social media be blocked, no matter which device [Android, iPhone, laptops, any OS] connects to the network.
Please provide the information about a DNS blocking software, which serves this purpose. I appreciate any other types of suggestion, which would serve this purpose. And I also want to see to that no device connects to a blocked website using a proxy server. Please respond ASAP.