Dual mode firewall

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01)

Patent

CA 2543270

Methods and devices are provided for implementing a dual mode firewall. Some implementations provide a firewall in a network device that acts as a bridge for Layer 2 traffic and acts as a router for Layer 3 traffic. In some implementations, a determination of whether to act as a bridge or a router for a packet is based on the configuration of the interface handling the packet. In some implementations, the network device inspects a destination of each packet to determine whether to act as a bridge or a router for that packet. The firewall screens both the Layer 2 and the Layer 3 traffic according to policies implemented in the firewall.

La présente invention concerne des procédés et dispositifs de mise en oeuvre d'un pare-feu bimodal. Certains modes de réalisation consistent à mettre en place, dans un dispositif d'un réseau, un pare-feu fonctionnant comme passerelle pour le trafic de couche 2, et comme routeur pour le trafic de couche 3. D'autres modes de réalisations demandent, pour savoir si le dispositif soit se comporter en passerelle ou en routeur vis-à-vis d'un paquet, de connaître la configuration de l'interface traitent le paquet. Dans le cas d'autres modes de réalisation, le dispositif de réseau analyse la destination de chaque paquet, ce qui lui indique s'il doit se comporter en passerelle ou en routeur pour le paquet. Le pare-feu filtre le trafic de couche 2 comme de couche 3 selon des politiques mises en oeuvre pour lui.

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