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Passive OS fingerprinting utility

'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 3.09b (stable)
released on 18 April 2016



LicenseVerified byVerified onNotes
License:LGPLv2.1Janet Casey4 September 2003

Leaders and contributors

Michal Zalewski Maintainer

Resources and communication

AudienceResource typeURI
Bug Tracking,Developer,SupportE-mailmailto:lcamtuf@coredump.cx

Software prerequisites

Required to buildlibpcap 0.4 or later
Required to buildGNUcc 2.7.x or later
Required to buildGNU make 3.7x or later
Required to buildBSD make - GNU bash / awk / grep / sed / textutils (for p0frep only)

This entry (in part or in whole) was last reviewed on 2 March 2017.


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”.

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