Verification of DNS accuracy in cache poisoning

Details Verification of DNS accuracy in cache poisoning Verification of DNS accuracy in cache poisoning

2011-04-19

2011-04-19

Avellino, Joseph E (Department: 2454)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data addressing

C713S170000

Reexamination Certificate

active

07930428

ABSTRACT:
Disclosed is a method, a computer system, and a computer readable media product that contains a set of computer executable software instructions for directing the computer to execute a process for independent confirmation of DNS replies to foil DNS cache poisoning attacks. The process comprises comparing a plurality of DNS replies for an exact or predefined “close enough” match as a condition for blocking or forwarding a DNS reply to a resolver. The tangible beneficial result is to prevent the success of a dns cache poisoning attack from diverting a user to a malicious site on the internet.

REFERENCES:
patent: 7296155 (2007-11-01), Trostle et al.
patent: 2002/0010798 (2002-01-01), Ben-Shaul et al.
patent: 2006/0161444 (2006-07-01), Lubrecht et al.
patent: 2007/0261112 (2007-11-01), Todd et al.
IETF RFC 3833 Aug. 2004 Threat Analysis of the Domain Name System (DNS).
IETF RFC 1034 Nov. 1987 Domain Names—Concepts and Facilities.

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