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Netcat: the TCP/IP swiss army

Netcat: the TCP/IP swiss army

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Related:  more analysis infoNetcat

NETWORK PACKET ANALYSIS PROGRAM Duration: 3 days (24 hours) Mode : 1. Instructor Led Class room Training and Labs 2. Netcat netcat is a network utility for reading from and writing to network connections on either TCP or UDP. Hobbit (hobbit@avian.org) created netcat in 1995 as a network analog of Unix cat command. The flexibility and usefulness of this tool have prompted people to write numerous other Netcat implementations -- often with modern features not found in the original. Netcat is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities. Most common version is 1.1:

Netcat – a couple of useful examples One of the Linux command line tools I had initially under-estimated is netcat or just nc. By default, netcat creates a TCP socket either in listening mode (server socket) or a socket that is used in order to connect to a server (client mode). Actually, netcat does not care whether the socket is meant to be a server or a client. All it does is to take the data from stdin and transfer it to the other end across the network.

Green Hackerz: NetCat Hello GreenHackers.. In this article we will discussed about NetCat. NetCat is also known as Swiss Army Knife.. So Let's Start... Download the Free Nmap Security Scanner Nmap and Zenmap (the graphical front end) are available in several versions and formats. Recent source releases and binary packages are described below. Older version (and sometimes newer test releases) are available from the dist directory (and really old ones are in dist-old). For the more security-paranoid (smart) users, GPG detached signatures and SHA-1 hashes for each release are available in the sigs directory (verification instructions). Before downloading, be sure to read the relevant sections for your platform from the Nmap Install Guide.

TC: NetSec lab The NetSec lab consists of a set of exercises for teaching network traffic anomaly detection to electrical engineering students. The lab explores basic methods for analyzing Internet Protocol (IP) traffic data destined to unassigned address space darkspace. The introduced dataset has been curated from data collected by the UCSD Network Telescope, which monitors traffic to a large (/8) dark address segment. An IP darkspace is a globally routable IP address segment with no active hosts. All traffic to an IP darkspace is unsolicited and unidirectional. Observing and analyzing darkspace traffic can facilitate study, analysis, and even detection of network attacks and global incidents such as scanning, DDoS attacks, network outages, and misconfigurations.

Useful Uses Of netcat Version 1.0 Author: Falko Timme Last edited 11/28/2008 This short article shows some useful netcat commands. netcat is known as the TCP/IP swiss army knife. From the netcat man page: netcat is a simple unix utility which reads and writes data across network connections, using TCP or UDP protocol. It is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities. I do not issue any guarantee that this will work for you!

Adam Palmer, Linux, PHP Programmer, MySQL Developer, Website Security Consultant I wrote this article some time ago, but thought I’d publish it here for reference. This text is dual licenced under the GFDL and GPL There are two known versions of netcat.

Related:  netcat (UDP Tools -- Unix & Linux)