If you want to use Nmap to scan any vulnerable site on the Internet, then a free version of Nmap is necessary. It is created by the NetSecurency Corporation, an Internet security company in the United States. It can be downloaded for free from their website at nmap.netsecurency.com. The software scans a website and reports its vulnerabilities so that you can try to fix them. When you are finished with the scanning, you will get the report that lists out all the vulnerabilities that the software has detected.
Nmap can be used to scan any website on the Internet which has a default Windows Firewall enabled. However, there are more advanced scanners that can scan through the entire Web Server, such as Apache, MySQL and the Nginx Web Server. However, if you are only interested in scanning the Web Server, then a free version of Nmap is recommended. Nmap is very easy to use because it allows you to configure your scanner. This means that you can customize your scanner settings and then use the tool to scan any website.
If you are scanning through the Windows Firewall, then you will need to make sure that the scanner is allowed to connect to the Internet. This is done by running "nmap -p 22 -sS" after the scan has been completed. This will allow Nmap to scan the Web Server. There are some caveats that you should know about when it comes to Windows Firewall scans. If your computer is already infected, then you may need to remove the infection by running the tool with admin privileges.
