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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. Idle scan - Wikipedia

    en.wikipedia.org/wiki/Idle_scan

    This script probes a host to classify its IP ID generation method, then prints the IP ID classification much like the OS detection does. Like most NSE scripts, ipidseq.nse can be run against many hosts in parallel, making it another good choice when scanning entire networks looking for suitable hosts. nmap -v -O -sS 192.168.1.0/24

  4. Transport Layer Security - Wikipedia

    en.wikipedia.org/wiki/Transport_Layer_Security

    Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network, such as the Internet.The protocol is widely used in applications such as email, instant messaging, and voice over IP, but its use in securing HTTPS remains the most publicly visible.

  5. Port knocking - Wikipedia

    en.wikipedia.org/wiki/Port_knocking

    Defeating port knocking protection requires large-scale brute force attacks in order to discover even simple sequences. An anonymous brute force attack against a three-knock TCP sequence (e.g. port 1000, 2000, 3000) would require an attacker to test every three port combination in the 1–65535 range and then scan each port between attacks to uncover any changes in port access on the target ...

  6. Banner grabbing - Wikipedia

    en.wikipedia.org/wiki/Banner_grabbing

    Tools commonly used to perform banner grabbing are Telnet, Nmap and Netcat. For example, one could establish a connection to a target web server using Netcat , then send an HTTP request. The response will typically contain information about the service running on the host:

  7. 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.