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Gordon Lyon (also known by his pseudonym Fyodor Vaskovich) [1] is an American network security expert, [2] creator of Nmap and author of books, websites, and technical papers about network security. He is a founding member of the Honeynet Project and was Vice President of Computer Professionals for Social Responsibility .
Network enumeration is a computing activity in which usernames and info on groups, shares, and services of networked computers are retrieved. It should not be confused with network mapping, which only retrieves information about which servers are connected to a specific network and what operating system runs on them.
Banner grabbing is a technique used to gain information about a computer system on a network and the services running on its open ports. Administrators can use this to take inventory of the systems and services on their network.
Nmap and NmapFE were used in The Listening, a 2006 movie about a former NSA officer who defects and mounts a clandestine counter-listening station high in the Italian alps. Nmap source code can be seen in the movie Battle Royale, as well as brief views of the command line version of Nmap executing in Live Free or Die Hard and Bourne Ultimatum. [45]
Many of these status codes are used in URL redirection. [2] A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD. A user agent may automatically redirect a request. A user agent should detect and intervene to prevent cyclical redirects. [1]: §15.4 300 Multiple ...
The result is that the application performs actions with the same user but different security context than intended by the application developer or system administrator; this is effectively a limited form of privilege escalation (specifically, the unauthorized assumption of the capability of impersonating other users). Compared to the vertical ...
Network administratively prohibited 10: Host administratively prohibited 11: Network unreachable for ToS: 12: Host unreachable for ToS: 13: Communication administratively prohibited 14: Host Precedence Violation 15: Precedence cutoff in effect 4 – Source Quench 0: deprecated [11] Source quench (congestion control) 5 – Redirect Message 0
Nmap – comprehensive active stack fingerprinting. p0f – comprehensive passive TCP/IP stack fingerprinting. NetSleuth – free passive fingerprinting and analysis tool; PacketFence [9] – open source NAC with passive DHCP fingerprinting. Satori – passive CDP, DHCP, ICMP, HPSP, HTTP, TCP/IP and other stack fingerprinting.