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P0f2

May 26, 2018

Passive OS fingerprinting tool

from the README

Passive OS fingerprinting is based on information coming from a remote host when it establishes a connection to our system. Captured packets contain enough information to identify the operating system. In contrast to active scanners such as nmap and QueSO, p0f does not send anything to the host being identified.

For more information, read Spitzner’s text at http//www.enteract.com/~lspitz/finger.html .

from the maintainer

Use of this program requires read access to the packet filtering device, typically /dev/bpf0. Granting such access allows the users who have it to put your Ethernet device into promiscuous mode and sniff your network. See http//www.infoworld.com/articles/op/xml/00/05/29/000529opswatch.xml if you do not understand how this can be harmful. Running p0f with no options will cause it to analyse packets intended for other hosts.

WWW http//lcamtuf.coredump.cx/p0f.shtml