netsh firewall show portopening

     A firewall is a software application, which is a gateway server on the network. It offers a unique level of protection against viruses and nasty infected with the virus that are based on unwanted incoming traffic to attack target computers. It does so by blocking communications to access your system without your permission. Some Microsoft operating systems like Windows XP and Windows Vista and Windows Server 2003 offers a free firewall for users to protect their computers.

     They are known as Windows Firewall and enables home networking and efforts to restrict access to your PC. Windows Firewall has as main purpose the maintenance of traffic between computer networks of different levels. It works most efficiently if it provides the proper configuration. Since no cost to use Windows Firewall which comes bundled with the operating system, you must activate it. If you opt for firewalls such as Norton, McAfee, ZoneAlarm or Comodo, must be chosen according to their work and personal needs. After selecting the firewall is setup.

     Installing a firewall requires careful consideration and planning, because this security system is most often placed on a critical path within a network topology. The next step required to configure the firewall. If you have any confusion during installation of the firewall, you may contact the computer center for assistance. They are certainly better options than doing all the wrong procedure. With a high proliferation of online services computer support, we need not look anywhere except the Internet. The list of good computer support centers to come after you type keywords, such as computer support, computer technical help or online help.computer centers will help not only help with installing the firewall, but also get your own done at any time. They are also available 24x7. Some online computer centers will help provide a complete package of computer support services that include everything you want for your computer and safety. All these characteristics make them superior and preferable to call an expensive technician to your premises or take your system to any showroom computer repair. 

     Here's a sample script that you can run from a command line (cmd.exe):
the following Netsh command will create a local firewall rule to allow certain addresses to FTP into a Windows Firewall-protected computer:
netsh firewall add portopening
protocol = TCP port = 21
name = FTP mode = ENABLE
scope = CUSTOM addresses =
192.168.0.0/255.255.255.0,
10.0.0.0/255.255.240.0

     Want to know which ports are open on your firewall? Just type this from a CMD line:
netsh firewall show portopening

 By: Seno Gendeng & IT administrators