Network firewall test methods and apparatus

Details Network firewall test methods and apparatus Network firewall test methods and apparatus

2003-10-03

2008-09-02

Moazzami, Nasser (Department: 2136)

Information security

Access control or authentication

Network

C709S224000

Reexamination Certificate

active

07421734

ABSTRACT:
A test method for Internet-Protocol packet networks that verifies the proper functioning of a dynamic pinhole filtering implementation as well as quantifying network vulnerability statistically, as pinholes are opened and closed is described. Specific potential security vulnerabilities that may be addressed through testing include: 1) excessive delay in opening pinholes, resulting in an unintentional denial of service; 2) excessive delay in closing pinholes, creating a closing delay window of vulnerability; 3) measurement of the length of various windows of vulnerability; 4) setting a threshold on a window of vulnerability such that it triggers an alert when a predetermined value is exceeded; 5) determination of incorrectly allocated pinholes, resulting in a denial of service; 6) determining the opening of extraneous pinhole/IP address combinations through a firewall which increase the network vulnerability through unrecognized backdoors; and 7) determining the inability to correlate call state information with dynamically established rules in the firewall.

REFERENCES:
patent: 2003/0115321 (2003-06-01), Edmison et al.
patent: 2003/0195861 (2003-10-01), McClure et al.
patent: 2004/0028035 (2004-02-01), Read

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