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Nmap features include: Fast scan (nmap -F [target]) – Performing a basic port scan for fast result. Host discovery – Identifying hosts on a network. For example, listing the hosts that respond to TCP and/or ICMP requests or have a particular port open. Port scanning – Enumerating the open ports on target hosts.
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:
hping is an open-source packet generator and analyzer for the TCP/IP protocol created by Salvatore Sanfilippo (also known as Antirez). It is one of the common tools used for security auditing and testing of firewalls and networks, and was used to exploit the idle scan scanning technique (also invented by the hping author), and now implemented in the Nmap Security Scanner.
This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for bidirectional traffic. TCP usually uses port numbers that match the services of the corresponding UDP implementations, if they exist, and vice versa.
When an idle scan is attempted, tools (for example nmap) tests the proposed zombie and reports any problems with it. If one doesn't work, try another. Enough Internet hosts are vulnerable that zombie candidates aren't hard to find. A common approach is to simply execute a ping sweep of some network. Choosing a network near your source address ...
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.
A list of TCP/OS Fingerprinting Tools Zardaxt.py [8] – Passive open-source TCP/IP Fingerprinting Tool. Ettercap – passive TCP/IP stack fingerprinting. Nmap – comprehensive active stack fingerprinting. p0f – comprehensive passive TCP/IP stack fingerprinting. NetSleuth – free passive fingerprinting and analysis tool
This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems. GNU Core Utilities include basic file, shell and text manipulation utilities. Coreutils includes all of the basic command-line tools that are expected in a POSIX system.