White Papers

Unverified Fields - A Problem With Firewalls & Firewall Technology Today

Overview Certain firewalls today will not authenticate the validity of certain protocol fields, within the packet they are processing. The risk is exposure of information. What kind of information can be exposed? Mainly it will be unique patterns of behavior produced by the probed machines answering the crafted queries (or other kind of network traffic initiated in order to elicit a reply). This paper introduces new operating system fingerprinting methods based on changing values inside certain fields of the ICMP datagram.

By downloading you agree to our Terms and Conditions. These include information regarding use of your personal data.

Publisher: Ofir Arkin
File Format: PDF
Date Published: Dec 4, 2008
Format: White Papers
Topics: Firewalls, Network Security

Similiar White Papers

Featured white papers

The Value of Location Intelligence in the Communications Industry

Pitney Bowes

Public Services are under pressure, the challenge is to do more with less. How do you improve citizen satisfaction, increase cost efficiencies and improve service delivery? The power of location intelligence is helping many local authorities...

Download now »
Best Practices for Translating Customer Satisfaction into Revenue

Citrix Online

Today's support organisations are focused on two top-level metrics: financial results and customer satisfaction. For most, it's easy to track financial performance, but customer satisfaction is akin to speaking a foreign language...

Download now »
HP print solutions and 3M

Hewlett-Packard (HP)

The objective for 3M was to optimize office printing infrastructure at 3M locations worldwide, reduce total cost and environmental footprint. Some of the business benefits acheived by switching to HP print solutions...

Download now »