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2. Idle scan - Wikipedia

   en.wikipedia.org/wiki/Idle_scan

   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.

3. Christmas tree packet - Wikipedia

   en.wikipedia.org/wiki/Christmas_tree_packet

   By analyzing those differences, Christmas tree packets can be used as a method of TCP/IP stack fingerprinting, exposing the underlying nature of a TCP/IP stack by sending the packets and then awaiting and analyzing the responses. When used as part of scanning a system, the TCP header of a Christmas tree packet has the flags FIN, URG and PSH set ...

4. Nmap - Wikipedia

   en.wikipedia.org/wiki/Nmap

   Nmap provides a number of features for probing computer networks, including host discovery and service and operating system detection. These features are extensible by scripts that provide more advanced service detection, [7] vulnerability detection, [7] and other features. Nmap can adapt to network conditions including latency and congestion ...

5. TCP/IP stack fingerprinting - Wikipedia

   en.wikipedia.org/wiki/TCP/IP_stack_fingerprinting

   TCP/IP stack fingerprinting is the remote detection of the characteristics of a TCP/IP stack implementation. The combination of parameters may then be used to infer the remote machine's operating system (aka, OS fingerprinting ), or incorporated into a device fingerprint .

6. TCP reset attack - Wikipedia

   en.wikipedia.org/wiki/TCP_reset_attack

   TCP/IP sockets facilitate communication between computers, such as between a workstation with a browser and a web server, through the exchange of a stream of data packets. The use of a TCP connection enables the transfer of large data items, which exceed the size limits of a single packet, including video clips, email attachments, or music files.

7. 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 ...