Firewall with two-phase filtering

Details Firewall with two-phase filtering Firewall with two-phase filtering

2005-08-02

2005-08-02

Barron, Jr., Gilberto (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C713S151000, C713S152000, C713S162000, C713S166000, C709S222000, C709S230000

Reexamination Certificate

active

06925572

ABSTRACT:
Two-phase filtering for a firewall is disclosed. In the first, general phase, a request is filtered to verify one or more of: that the request is pursuant to a supported protocol, that a command of the request is allowed, that the length of the request does not exceed the allowed maximum for the command, and that characters of the request are of an allowable type. Upon first-phase verification, a second phase is invoked that is particular to the protocol of the request. In the second, specialized phase, the request is filtered to verify one or more of the source, the destination, and the content of the request. Upon second-phase verification, the request is allowed to pass. If either first-or second-phase verification fails, then the request is denied.

REFERENCES:
patent: 4754420 (1988-06-01), Jensen
patent: 5630757 (1997-05-01), Gagin et al.
patent: 5781534 (1998-07-01), Perlman et al.
patent: 5835726 (1998-11-01), Shwed et al.
patent: 5951651 (1999-09-01), Lakshman et al.
patent: 6061797 (2000-05-01), Jade et al.

Affiliated with

Also associated with

Rating

Firewall with two-phase filtering does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Firewall with two-phase filtering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Firewall with two-phase filtering will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3445101