Did you know that when your computer is connected to the Internet, it has over 131 000 “ports” that an attacker can connect to? These ports are like doors in a building and if they are not adequately protected, then someone could sneak in without being noticed. If the attacker does not install a virus, they can still do serious damage without alerting your security software, including the transfer of your personal information. So how can you see all these doors to your information? You need a firewall!
In terms of construction, a firewall is a fireproof wall that divides the building to stop the spread of fire from one area to another. In computer terms, we have to stop communication between the computer and the other on the Internet. Total blocking of all Internet communication would be useless, though, so you need a way to choose which type of communication that you receive. To this end, the computer’s firewall and filters are a lot of rules that the construction of firewalls, access doors.
Where do I put this firewall?
Firewalls can be a hardware box (a separate unit or part of your Internet modem or router), or perhaps a software installed on your computer. Most popular security software also includes a firewall. A hardware firewall is ideal for providing a barrier before even reaching your computer and will also mean that your computer does not have to spend valuable resources on running firewall software. It also reduces the risk of the firewall itself is compromised because some viruses may attempt to disable security features of software running on your computer. The disadvantage is that a firewall based on the equipment can be expensive and not so easy to configure and maintain, if you are unsure on how to use them.
If Microsoft gives me a firewall, do I need another?
Windows Firewall (on Windows XP SP2 and Vista) only looks at incoming messages coming into your computer from the Internet. If your computer is infected (eg if you install free software that turns out to have a nasty hidden), so that your outgoing message to other computers on the Internet will not be studied or filtered. It can turn your computer into a source of infection affects your safety and the Internet. It is also recommended not to run more than one firewall program because it uses more processing power and can cause conflicts, so if your security software contain a firewall, turn off the Windows Firewall.
If I have a secure wireless connection, the need for a firewall?
Wireless connectivity is another way to get onto the Internet and wireless security controls that can be used in this context. This is similar to the one that allows you to connect a phone line. Once connected, you can 131 000 + doors are still open for hackers, so you still need a firewall. A firewall can be included in a wireless router, but it’s worth checking.
Why keep it to give me messages?
If you do something in particular (such as installing new software or troubleshoot a connection problem), you may need to temporarily disable your firewall. Firewall software may warn you that a connection was attempted and blocked, and ask you if you want to allow this type of connection in the future. In general, if you do something new that would probably involve an Internet connection, you can allow the connection – or “only this time” or for any future connection attempts when in doubt, block it, so that you can afford. later if you think it is necessary.
Firewalls provide a greater degree of security, which has now become the minimum standard to protect your computer. They require a certain level of knowledge or a mainframe computer support person, talk to your local computer repair to ensure you’re protected.