Welcome to my blog

I am a computer engineer. I also have a post graduate degree in Computer And Network Systems Security.
I created this blog to document as well as share any interesting stuff I come across. I will be posting lots of cool stuff on Computer Networking, Hacking, Puzzles and other things.

 

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this is a test post

Difference between a scripting language and a programming language

A programming language needs to be compiled before it can run, like C or C++ but a scripting language like PHP doesn't. PHP is a server side scripting language and it can be run straight from the server's side without any compiling.

Locking the console in Linux

Install vlock by typing apt-get install vlock.
Change to console by pressing Ctrl+Alt+Fx (x=1-6)
Now type vlock -a or vlock -c

Bash scripting- The Basics

What is bash scripting?
Bash scripting is a type of shell scripting in Linux. Other types of shell scripts include csh, tcsh, ksh, zsh etc.

How to use traceroute when traceroute is not working!!!!

Okay, let me try and do a traceroute to my college website this time.

Understanding how Traceroute works using wireshark

When we are connecting to a website, we are going through different hops or routers. Each time we connect to a website, the path taken could be different. So the hop count will also be different. Using Traceroute, we can determine the path traversed. Traceroute uses a very intelligent method for this.

Anonymous FTP

If anonymous FTP is enabled, you can login remotely using username and password as 'anonymous'. Its very rare to find it these days. But its worthwhile to try it if after doing an nmap scan, you find that FTP port 21 is open, especially if the OS used is XP.

Password hashes in Linux

 The passwords are not stored in clear text. Instead a one way hash function is used. That means it is very difficult for an attacker to crack the password even if the hash is obtained.  The hash can be obtained from /etc/shadow. It will look something like this:

Wireshark

Wireshark is a packet analyzer, one of the best and easiest to use. Its got a beautiful GUI that's really user friendly and you can learn a lot of things by just analyzing the packets by using it.
It is available for windows and linux. Like all cool tools, its pre-installed on Backtrack.