PR: ports/64580 Submitted by: Radim Kolar <hsn@netmag.cz>
PR: ports/62582 Submitted by: Yonatan Bokovza <Yonatan@Xpert.com>
PR: ports/44153 Submitted by: Ulrich Spoerlein <q@uni.de>
Xprobe is a tool automating the X logic. X is a logic developed from the various Active Operating System Fingerprinting methods discovered during the "ICMP Usage In Scanning" research project. Obtained from: OpenBSD