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  2. Christmas tree packet - Wikipedia

    en.wikipedia.org/wiki/Christmas_tree_packet

    When used as part of scanning a system, the TCP header of a Christmas tree packet has the flags FIN, URG and PSH set. [1] Many operating systems implement their compliance with the Internet Protocol standards [2] [3] in varying or incomplete ways. By observing how a host responds to an odd packet, such as a Christmas tree packet, inferences can ...

  3. Port scanner - Wikipedia

    en.wikipedia.org/wiki/Port_scanner

    Nmap supports most of these. [6] X-mas and Null Scan - are similar to FIN scanning, but: [3] X-mas sends packets with FIN, URG and PUSH flags turned on like a Christmas tree; Null sends a packet with no TCP flags set; Protocol scan - determines what IP level protocols (TCP, UDP, GRE, etc.) are enabled.

  4. Virtual private network - Wikipedia

    en.wikipedia.org/wiki/Virtual_private_network

    Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).

  5. Idle scan - Wikipedia

    en.wikipedia.org/wiki/Idle_scan

    nmap -v -O -sS 192.168.1.0/24. This tells nmap to do a ping sweep and show all hosts that are up in the given IP range. Once you have found a zombie, next you would send the spoofed packets: nmap -P0 -p <port> -sI <zombie IP> <target IP> The images juxtaposition show both of these stages in a successful scenario.

  6. Nmap - Wikipedia

    en.wikipedia.org/wiki/Nmap

    Nmap is used for network reconnaissance and exploitation of the slum tower network. It is even seen briefly in the movie's trailer. The command Nmap is widely used in the video game Hacknet, allowing to probe the network ports of a target system to hack it. In Snowden, Nmap is used in the aptitude test scene about 14 minutes into the movie.

  7. TCP reset attack - Wikipedia

    en.wikipedia.org/wiki/TCP_reset_attack

    A TCP reset attack, also known as a forged TCP reset or spoofed TCP reset, is a way to terminate a TCP connection by sending a forged TCP reset packet. This tampering technique can be used by a firewall or abused by a malicious attacker to interrupt Internet connections.