When i say NULL ROUTE or BLACK HOLE ROUTING the first thing comes in your mind is what the hell is this?

What kind of interface is this NULL 0?

What is black hole in Router?

What is need of Null route in Networking?

Who used it and why?


In this tutorial you will get all the answer and will also learn what is Null Routing ,how to configure Null routing and why we use Null routing.

In computer network NULL ROUTE(BlackHole Route) is a network route which goes nowhere.Or you can say null route or a blackhole route is a route which divert the network in a black hole from where it never come back again.it is a type of Trash or Recycle Bin for route packets.People or company used this to drop some specific network or stop ddos attack.All traffic sent to null interface is discarded.IT person or Network Engineers used it discard traffic simply by routing it to null interface.

Note:You can filter or DROP Packet even by using ACL but Null Route is best because Access List Required More CPU overhead.


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In this tutorial we will learn and try to understand the types of files in Linux and how to identify them all.Before using any operating system we must know about the types of files available in those operating system.Like other OS Linux OS also has some files and each files have different properties and assigned for different task.

Types of files in linux.

The following are the list of file types, and their associated character:

• – regular file
• d directory
• b block device
• c character device
• l symbolic link
• s socket link, also called a Unix networking socket
• p first-in first-out (FIFO) buffer, also called a named pipe

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In this tutorial we will learn CISCO IOS basics. we will learn about the types of memory used in cisco devices like cisco routers and cisco switches.We will also focus on Cisco IOS Boot Process. We wil Learn how IOS is loaded in memory of cisco devices and different modes of Routers and switches.

ethical Hacking

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If you are a Linux User and you are using Linux for storing data and doing multiples tasks then you must need to manage your hard drive in linux.sometimes you need to create new partition,sometimes you need to delete some of your partitions as per your requirement.And if you don’t have idea about how to create and delete partition in Linux then it will become very hectic task for you to manage your data in Linux and sometimes it may result in Data Loss.even many people used Linux and windows together in Dual Boot(mean Windows and Linux Together in a Hard Disk).In such case even a little mistake done at Linux Side can Destroy  your all Windows data because all data resides on same Hard Disk.

ethical Hacking

So for everyone who wants to keep Linux in His/Her laptop or Computer this article is for you.here in this article i am going to show you how to Create and Delete partitions in Linux very easily in just few simple steps.

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Whenever we Download or Upload a Files from any machine the FTP Protocols comes in to service.FTP stand for File Transfer Protocol.It’s names say everything about self. Whether you Download a File From Server or Upload a File up on server FTP comes in use.

DOWNLOADING: When data get transferred from Server to Client the process is known as Downloading.


UPLOADING: When data transferred from client to Server the Process is known as Uploading.

So whether you transfer file from server to client or client to server ,in both case the data get transferred and whenever or wherever the data get transferred from one place to another the FTP protocol comes in to use.

So today in This tutorial we will learn how to Configure this FTP service on Redhat enterprise Linux and also learn how to use it.I use very simple and short steps to mention the configuration of FTP Server configuration and FTP Client Configuration along with its command and usage. Read the rest of this entry »

I have already written two articles on User and Group management in Linux.here in this article mostly i focused on how to create and delete multiple users or multiple groups in linux at a time.And we will also learn How to create a series of Linux Users in a sequence like from U1 to U100 at a time and delete them.

User and Group Management For Linux User Part-1

User and Group Management For Linux User Part-2

How to Lock and unlock Users in Linux in Detail.

And Now this is part-3 of User and Group Management Tutorial in Linux.

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