Firewalk (computing)
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Firewalking is a technique developed by Mike Schiffman and David Goldsmith that employs traceroute-like techniques to analyze IP packet responses to determine gateway ACL filters and map networks. It is an active reconnaissance network security tool that attempts to determine what layer 4 protocols a given IP forwarding device "firewall" will pass.
Firewalk is a tool to perform Firewalking. To protect a firewall / gateway against firewalking one can block ICMP Time Exceeded messages[1].
See also
References
- ^ Rahul Kokcha
External links
- Firewalk tool, an Open Source tool that determines gateway ACL filters and maps networks by analyzing IP packets responses.
- WooterWoot, an Open Source set of tools that builds Check Point, Cisco ASA, or Netscreen policies from logfiles.
- Use Firewalk in Linux/UNIX to verify ACLs and check firewall rule sets, article on using Firewalk, by Lori Hyde CCNA.
- firewalk(8) - Linux man page
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