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Professional Practices in Information Technology CSC 110 ProfessionalPracticesi n Information Technology HandBook COMSATS Institute of Information Technology (Virtual Campus) Islamabad, Pakistan Professional Practices in Information Technology Lecture 18 Hacking (Continued) 18.1 Why Do People Hack? – Just for fun. – Show of their knowledge – Hack other system secretly. – Destroy enemy’s computer network during the war. – For profit people pays a cracker. – Crack for sake of curiosity.  The Psychology of Hackers – All information should be free. – Access to computer should be unlimited and free. – It can change life for better. – It can create beauty on computer. 18.2 Types of hacking There are many types of hacking like: – Password hacking – Software hacking – Net hacking  Password hacking CSC 110 Professional Practices in Information Technology CSC 110 There are two types for password hacking. Brute force and dictionary based. Brute force – In that case hackers try out all the combination of all keyboard letters .it has greater success but it takes long time Dictionary based – In that they are use predefine password. It is unsuccessful method  Software hacking – In that hackers changes the look & execution way of that software – Change the demo version into full version by decoding the source code  IP address – IP address is the address of your computer in the internet. It is unique. Like: – 192.168.23.45  Port It is not physical port but it is logical port in your computer. It is just like hole onto the system through hacker can enter. There are thousands of ports into computer. The particular service is running on particular port. Like: Port 21: ftp Port 23: telnet Port 80: http Port 25: mail  Hacking tools There are many tools are available – Scanners – Telnet – FTP Professional Practices in Information Technology CSC 110 – LAN watch  Scanners It is not a photo scanner. Scanner is program that automatically detects security weakness in remote host. Port scanners are used in hacking. Port scanner can give the whole list of open port on that system and which service is running on that. It can use almost all operating system. ex. SATAN, NMAP  Telnet Telnet is ultimate hacking tool. It is terminal emulation program that allows us to connect to remote system. You have to follow this step to use telnet. C:\windows\telnet [ ip address] port  Ftp FTP is one type of protocol but some time it is used as hacking tool, port 21 for the ftp. For connecting ftp we need some ftp s/w known as ftp client. For connecting ftp server you have to hammer that server. Command: c:\windows\ftp [ip address]