Testing your firewall

Beginner Series

When working on setting up your firewall you can check your work with various online tools.

I prefer nmap online which will email you the results after the tests are done. Be patient it will take a little while to get them.

The email that comes in will look like this example:

Hi,

this email was generated by Nmap Online
http://nmap-online.com/

We apologize if you did not request such a scan,
your email was probably misused by someone.

Your scan has finished.

Scan Options: -F -T5 -sS XXX.XXX.XXX.XXX

You can view the scan result page on address
http://nmap-online.com/scan.php?id=377919

Steve Gibson's Shields Up is another site that I use to test the firewall that I am working on. It will test different ports and give you the results while you wait.

Matthew L Davidson
Lexington KY