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Published on January 13th, 2012 | by MaxiSoler

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p0f3 v3 RC Released

P0f is a tool that utilizes an array of sophisticated, purely passive traffic fingerprinting mechanisms to identify the players behind any incidental TCP/IP communications (often as little as a single normal SYN) without interfering in any way.

Some of p0f’s capabilities include:

  • Highly scalable and extremely fast identification of the operating system and software on both endpoints of a vanilla TCP connection – especially in settings where NMap probes are blocked, too slow, unreliable, or would simply set off alarms.
  • Measurement of system uptime and network hookup, distance (including topology behind NAT or packet filters), user language preferences, and so on.
  • Automated detection of connection sharing / NAT, load balancing, and application-level proxying setups.
  • Detection of clients and servers that forge declarative statements such as X-Mailer or User-Agent.

The tool can be operated in the foreground or as a daemon, and offers a simple real-time API for third-party components that wish to obtain additional information about the actors they are talking to.

Common uses for p0f include reconnaissance during penetration tests; routine network monitoring; detection of unauthorized network interconnects in corporate environments; providing signals for abuse-prevention tools; and miscellanous forensics.

Changelog v3 RC

Version 3 is a complete rewrite, bringing you much improved SYN and SYN+ACK fingerprinting capabilities, auto-calibrated uptime measurements, completely redone databases and signatures, new API design, IPv6 support (who knows, maybe it even works?), stateful traffic inspection with thorough cross-correlation of collected data, application-level fingerprinting modules (for HTTP now, more to come), and a lot more.

Download p0f3 v3 RC

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About the Author

www.artssec.com @maxisoler



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