certified ethical hacker.

An ethical hacker are usually peoples employed by an organization who trusts him or her to attempt to penetrate networks or computer systems, using the same methods as a hacker would deploy for hacking into networks or computer systems. The purpose of a n ethical hacker is of finding and fixing computer security vulnerabilities and preventing the hack .

Illegal hacking (i.e., gaining unauthorized access to computer systems) is a crime in most countries, but penetration testing done by request of the owner of the targeted systems or networks is not considered as a crime infact ethical hackers are paid for it.

A Certified Ethical Hacker are those people who have obtained a certification in how to look for the weaknesses and vulnerabilities in target systems and uses the same knowledge and tools as a hacker would use.

The EC-Council 's Certified Ethical Hacker (C|EH) is a professional certification in the field of ethical hacking. C|EH is just a starting step in Information security field.

Port Scanning

Port Scanning is one of the most popular techniques used by hackers to discover services that can be compromised.

• A potential target computer runs many ‘services’ that listen at ‘well-known’ ‘ports’.
• By scanning which ports are available on the victim, the hacker finds potential vulnerabilities that can be exploited.
• Scan techniques can be differentiated broadly into Vanilla, Strobe, Stealth, FTP Bounce, Fragmented Packets, Sweep and UDP Scans.

Port Scanning Techniques

 
Port Scanning Techniques can be broadly classified into:

• Open scan
• Half- open scan
• Stealth scan
• Sweeps
• Misc

Commonly used hacking tools for port scanning

1. Tool: SuperScan 4.0

  

How to Trace Any IP Address

Tracing an IP address is very simple and easy than we think. There exists many websites through which you can trace any IP address back to it’s source. One of my favorite site is ip2location.com.

Just go to http://www.ip2location.com/demo.aspx and enter the IP address that you want to trace in the dialog box and click on “Find Location”‘. With just a click of a button you can find the following information for any given IP address.

1. Country in which the IP is located

2. Region

3. City

4. Latitude/Longitude

5. Name of the ISP

6. Area Code and

7. Domain name associated with the IP address.

You can also visually trace route any IP address back to it’s location. For this just visit http://www.yougetsignal.com/tools/visual-tracert/ and enter the IP you want to trace in the dialog box and hit the “Proxy Trace” button. Wait for few seconds and the visual trace route tool displays the path Internet packets traverse to reach a specified destination.