Proxy gateway anti-virus method, pre-classifier, and proxy gateway

A non-transitory computer readable medium storing computer executable instructions that when executed in a computer performs:

• sending, upon detection of a request received via a computer network for a resource, a detection request to a network element that stores the resource, to obtain attribute information of the resource;
• determining, based on an anti-virus policy stored on a memory of the computer and the attribute information, not to perform anti-virus scanning on the resource when the resource is received;
• receiving, the resource from the network element;
• and
• based upon the determining, skipping the anti-virus scanning on the received resource and transmitting the received resource.

A proxy gateway device, comprising:

• computer hardware configured to execute:
• sending, upon detection of a request received via a computer network for a resource, a request to a network element that stores the resource, to obtain attribute information of the resource;
• determining, based on an anti-virus policy stored on a memory of the proxy gateway device and the attribute information, not to perform anti-virus scanning on the resource when the resource is received;
• receiving, the resource from the network element;
• and
• based upon the determining, skipping the anti-virus scanning on the received resource and transmitting the received resource.

A proxy gateway device, comprising:

• computer hardware configured to execute:
• sending, upon detection of a request received via a computer network for a resource, a request to a network element that stores the resource, to obtain attribute information of the resource;
• sending the attribute information to an external server to instruct the external server to perform a determination, based on the anti-virus policy and the attribute information, not to perform the anti-virus scanning when the resource is received;
• receiving a result of the determination from the external server;
• receiving, the resource from the network element;
• and
• based upon the determination result, skipping the anti-virus scanning on the received resource and transmitting the received resource.