US Patent 9009461 Selectively performing man in the middle decryption

A HTTP request addressed to a first resource on a second device outside the network is received from a first device within the network. The HTTP request is redirected to a third device within the network. A first encrypted connection is established between the first device and the third device, and a second encrypted connection between the third device and the second device. The third device retrieves the first resource from the second device. The first resource is modified to change pointers within the first resource to point to location in a domain associated with the third device within the network. The third device serves, to the first device, the second resource.