The different ways in which your computer is protected at different layers are:
1. Firewall – A firewall can help protect your computer by preventing hackers or malicious software from gaining access to it.
2. Virus Protection – Antivirus software can help protect your computer against viruses, worms, and other security threats.
3. Spyware and other malware protection: Antispyware software can help protect your computer from spyware and other potentially unwanted software.
4. Windows Update: Windows can routinely check for updates for your computer and install them automatically.
In this post we will focus on the importance of a enabling firewall on a computer.
A firewall can help protect your computer by preventing hackers or malicious software from gaining access to it. A firewall is software or hardware that checks information coming from the Internet or a network and then either turns it away or allows it to pass through to your computer, depending on your firewall settings. In this way, a firewall can help prevent hackers and malicious software from gaining access to your computer.
Windows Firewall is built into Windows 7 and is turned on automatically.
How a firewall works :
If you run a program such as an instant messaging program or a multiplayer network game that needs to receive information from the Internet or a network, the firewall asks if you want to block or unblock (allow) the connection. If you choose to unblock the connection, Windows Firewall creates an exception so that the firewall won’t bother you when that program needs to receive information in the future.
In Windows 7, different firewall settings are enabled based on the Network Location you choose when you connect first time to a network. This automatically sets the appropriate firewall and security settings for the type of network that you connect to.
There are four network locations:
Choose Home network for home networks or when you know and trust the people and devices on the network. Computers on a home network can belong to a homegroup. Network discovery is turned on for home networks, which allows you to see other computers and devices on the network and allows other network users to see your computer.
Choose Work network for small office or other workplace networks. Network discovery, which allows you to see other computers and devices on a network and allows other network users to see your computer, is on by default, but you can’t create or join a homegroup.
Choose Public network for networks in public places (such as coffee shops or airports). This location is designed to keep your computer from being visible to other computers around you and to help protect your computer from any malicious software from the Internet. HomeGroup is not available on public networks, and network discovery is turned off. You should also choose this option if you’re connected directly to the Internet without using a router, or if you have a mobile broadband connection.
The Domain network location is used for domain networks such as those at enterprise workplaces. This type of network location is controlled by your network administrator and can’t be selected or changed.
Note: When you allow a program to communicate through the firewall, it’s allowed for every network with the same location as the network you’re currently connected to. For example, if you connect to a network in a coffee shop and choose Public network as the location, and you then unblock an instant message program, that program will be unblocked for all public networks that you connect to.