Network and Network Security tools for system administrators

Network and Network Security tools of any Linux system

Before you start

Objectives : You will be able to know about many tools which are used by network administrators.

Prerequisites: You have to know the basic of Network and Linux System.

Tags : ping, traceroute, tcpdump, telnet, ssh, ifconfig, netstat, nmap, iwconfig.

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Understanding the basic of Linux tools

We all know that , today Linux is the system which are used by almost all network and network security engineers as well as system administrators because they give flexibility to work easy and manage the whole network.
Now, we are going to discuss one by one these tools:

1.PING:PING stands for Packet InterNet Groper in computer networking field. It is a computer network administration software utility used to test the network connectivity between two systems. These systems may be any type of normal personal computer, Server, Switch, Router or Gateway.

2.TRACEROUTE:traceroute is a computer network diagnostic tool for displaying the route and measuring transit delays of packets across an Internet Protocol network.

3.TCPDUMP:tcpdump is a common packet analyzer that runs under the command line. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.

4.TELNET:Telnet is a protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented terminal connection.

5.SSH:SSH stand for Secure Shell. It is basically used to take console of network devices securely. In telnet, our data is not encrypted, but in SSH we have RSA algorithm which is used to encrypt our data and we get console of network device securely.

6.IFCONFIG:ifconfig is a system administration utility in Unix-like operating systems for network interface configuration. The utility is a command line interface tool and is also used in the system startup scripts of many operating systems.

7.NETSTATIn computing, netstat is a command-line network utility tool that displays network connections for the Transmission Control Protocol, routing tables, and a number of network interface and network protocol statistics.

8.NMAP:nmap is a security scanner, originally written by Gordon Lyon, used to discover hosts and services on a computer network, thus building a "map" of the network.

9.IWCONFIG:iwconfig is similar to ifconfig, but is dedicated to wireless networking interfaces. It is used to set the parameters of the network interface which are specific to the wireless operation (eg. frequency, SSID).