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'p0f2' is a versatile passive OS fingerprinting utility, to be used for evidence or information gathering on servers, firewalls, IDSes, and honeypots, for pen-testing, or just for fun. It is a complete rewrite of p0f version 1 that used to be maintained by William Stearns. 'P0f' is useful for gathering profiling information about your users and customers or attackers (IDS, honeypot, firewall), for active or passive policy enforcement (restricting access for certain systems or otherwise handling them differently), and for content optimization, pen-testing, and thru-firewall fingerprinting, as well as the tasks for which active fingerprinting is not suitable.


User README included


Download version 2.0.5 (stable)
released on 13 September 2004



LicenseVerified byVerified onNotes
LGPLv2.1Janet Casey4 September 2003

Leaders and contributors

Michal Zalewski Maintainer

Resources and communication

Audience Resource type URI
Bug Tracking,Developer,Support E-mail

Software prerequisites

Kind Description
Required to build GNUcc 2.7.x or later
Required to build GNU make 3.7x or later
Required to build BSD make - GNU bash / awk / grep / sed / textutils (for p0frep only)
Required to build libpcap 0.4 or later

This entry (in part or in whole) was last reviewed on 14 September 2004.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

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