Network security device

Details Network security device Network security device

2002-04-11

2008-11-11

Parthasarathy, Pramila (Department: 2136)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular node for directing data and applying cryptography

C726S013000

Reexamination Certificate

active

07451306

ABSTRACT:
A network security device that does not require a separate computer for implementation is disclosed. The device may be in the form of a boxed hardware component and may be configured from an HTML interface. The device contains and uses three network cards. The first two cards are used for the firewall. A third card is a management interface having a private, non publicly routed IP address. A first network card forwards packets to a packet filter. Packets which pass the packet filter are then forwarded to a second network card and subsequently to their destination. None of the three network cards have a publicly routed IP address. The device acts as a packet filter that bridges rather than routes or proxies. The device may be connected between a router and a hub or a server machine.

REFERENCES:
patent: 5884025 (1999-03-01), Baehr et al.
Liu, Jianbing and Ma, Yan, “Packet Filtering in Bridge”,IEEE Communications Society, Internet Workshop 1999, pp. 94-98 (published Piscataway, NJ, 1999).

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