Firewalk (computing): Difference between revisions

Revision as of 09:17, 27 May 2012

Revision as of 11:49, 11 July 2012

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{{notability|date=January 2011}}

{{primarysources|date=January 2011}}

Firewalking is a technique developed by Mike Schiffman and David Goldsmith that employsutilizes traceroute-like techniques and TTL values to analyze IP packet responses in order to determine gateway ACL (Access Control List) filters and map networks. It is an active reconnaissance network security toolanalysis technique that attempts to determine whatwhich layer 4 protocols a given IP forwarding devicespecific "firewall" will passallow.<br />

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Firewalk is a tool to perform Firewalking. To protect a firewall / gateway against firewalking one can block [[Internet Control Message Protocol|ICMP]] [[ICMP Time Exceeded|Time Exceeded]] messages<ref>Rahul Kokcha</ref>.