Tech Support For Security With Firewall
The decision to protect your computer with a Firewall is important as it will provide protection for your
Use of firewall to removeÂ security threats
computer as you work, shop or play online. The functionality of all firewalls is basically the same. The program is the first to come in contact with incoming data, inspect the data and decide as to the level of threat posed by the data. All this work is done before the data reaches the operating system or the network it is guarding.
There are many types of firewalls to choose from and the choice of a firewall has to match the requirements of the user. There are hardware firewalls and software firewalls. Hardware firewalls are generally used to protect multiple computers. They act as separate devices that run their own operating systems and thus are able to offer additional security for your computer. Software firewalls should be installed from a CD or DVD for best results and only one should be protecting your computer at any given time. However, you can use a hardware firewall in conjunction with a software firewall for maximum protection. The strength of a firewall can be boosted by using it along with other protectiveÂ antivirus softwareÂ while conforming to safe computing practices.
Firewall techniques that are used to provide protection are:
- Packet filtering
- Proxy server
- Circuit-level gateway
- Application gateway
Each packet or chunk of data that passes through the network is inspected and is allowed or denied entry in keeping with the rules defined by the user. Although this technique is not that easy to configure it is effective and easy to understand. One drawback of this type ofÂ firewallÂ is that it may at times be susceptible to IP spoofing.
This process intercepts all messages that enter and leaves the network. It is a highly effective way to hide the true network addresses.
This method uses a security mechanism whenever a UDP or TCP establishes a connection. Once the connection has been authenticated then packets can be exchanged between the two hosts without further checking.
Here, the security mechanisms are placed to cover certain applications such as TELNET and FTP. This is a very effective way to safeguard your computer even though it may impact performance.
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