([Unix system mode] XProbe is a remote host operating system exploration tool. The developers are based on some of the same technologies (sametechniques) as Nmap and add their own innovations. Xprobe obtains fingerprints through the ICMP protocol. The latest version is Xprobe2.0.3. Xprobe2 automatically sniffs the ICMP datagram characteristics corresponding to the datagram through fuzzy matrix statistical analysis, and then sniffs to obtain the type of the remote operating system. Note: Through self-test, the identification effect is very high for the old operating system, and the identification effect for the new kernel system is not very accurate.)