Patent ID: 7886145

Claim:
A computer-readable method comprising: determining, at a first network node, whether a packet is to be sent from a first network to a second network, wherein the first network node is a perimeter network device of the first network, and the determining comprises determining whether the first network is configured to support a network security technique, the second network is not configured to support the network security technique, and the packet will be processed by a second network node, wherein the second network node is configured to support the network security technique; if the packet is to be sent from the first network to the second network , including network security information with the packet, wherein the network security information is associated with the network security technique, the network security information is configured to prevent the second network from accessing the network security information, and the network security information is configured to allow the second network node to access the network security information; and if the packet is not to be sent from the first network to the second network, performing further processing on the packet.