公开(公告)号：US20170104722A1

公开(公告)日：2017-04-13

申请号：US14877116

申请日：2015-10-07

Applicant: Cisco Technology, Inc.

Inventor： Vincent E. Parla ,  Hari Shankar ,  Constantinos Kleopa ,  Venkatesh N. Gautam ,  Gerald N.A. Selvam

IPC: H04L29/06

CPC classification number: H04L63/0281 ,  H04L63/0254 ,  H04L63/1425

Abstract: A network security device (NSD) is connected between a network and an endpoint device configured to host a client application. The client application communicates with the network through the network security device using a request-response protocol. The NSD receives from the client application a request destined for the network and that seeks a response from the network. The request has a context header including context information about the client application. The NSD determines whether the client application or a file accessed thereby has a suspicious nature based on the context information. If it is determined that the client application or the file accessed thereby has a suspicious nature, the NSD blocks the request from the network, and sends to the client application a response indicating the block.