Network Programming Wikiclass | Tutorial / Network Security

Activity One - Netstat

Find out if your computer is secretly connecting to the networks and the Internet

Type cmd in your Windows Run box.
Type "netstat -b 60 > activity.txt" and press enter.
After say a few hours, press Ctrl+C.
Type "activity.txt" on the command line to open the log file in notepad.

This .txt file will have a record of everything that has made an Internet connection in the last couple of minutes; you can then check your task manager to find out where it is and take care of it.

Analyze the statistics about the programs that open network connections.
Analyze the statistics about the TCP ports (foregin ports) in the network connections.
Analyze the statistics about the foreign addresses/hosts. Do you find any foreign hosts that you do not have any knowledge?
Reference: Is Your Computer Connecting To Websites Without Your Knowledge
Useful tools for you:

Notepad2, Excel sorting, charting and other functions

Activity Two - Nmap

Nmap is a free security scanner for network exploration and security audits.

Install Nmap in your computer.
Use Nmap to scan a host for network exploration.
Prepare a presentation about your findings such as:
- Operating system
- Ports and the corresponding services that are opened
Some useful tools for you:

Find your IP Neigbours

Google: "index of" Last modified site:.hk

Submission

You need to demonstrate your work and sharing your knowledge in a tutorial session. Your instructor may ask you some questions to test your knowledge.