FIREWALL

The member in group 1. Bhummikorn M.2/5 No.5 2.Borwornrat Khrongsiriwat M.2/5 No.6 3. Panaphon sangobsakun M.2/5 No.20 4.Kalint Muangsornkeaw M.2/5 No.30

A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls will prevent unauthorized Internet users from accessing private networks connected to the Internet By Kalint Muangsornkeaw M.2/5 No.30

Please make sure that you only install one firewall, otherwise you will cause severe system instability and may have to reinstall your operating system. 1.Please go to Zone Alarm's site and download Zone Alarm Free Edition. 2.Save the file to your desktop. 3.Doubleclick on the zaSetup_en.exe file that you just saved. 4.After you double click the file, it will ask which version of Microsoft Windows you are using. 5.Select your window version then click next for download to your computer. 6.After Zone Alarm downloads, click the Next button for installation. 7.On the next screen, enter a valid address so you can register and download future Zone Alarm updates and then click Next. HOW TO INSTALL FIREWALL 8.Put a checkmark next to the "I accept the terms of the preceding License Agreement" and click Install.

10.Zone Alarm will scan your computer so it can auto-configure the necessary configuration. 11.ZoneAlarm is now installed on your computer and then restart your computer 12.When your computer restarted, Getting Started window will show up, please watch the video until finish. 13.ZoneAlarm is now configured for your computer. BY PANAPHON SANGOBSAKUN NO.20 M.2/5 9.Then it will asks if you want to start Zone Alarm now, click the Yes button.

Advantages of firewall: Concentration of security, all modified software and logging is located on the firewall system as opposed to being distributed on many hosts; Protocol filtering, where the firewall filters protocols and services that are either not necessary or that cannot be adequately secured from exploitation

Disadvantage 1. The most obvious being that certain types of network access may be hampered or even blocked for some hosts, including telnet, ftp, X Windows, NFS, NIS, etc. However, these disadvantages are not unique to firewalls; network access could be restricted at the host level as well, depending on a site's security policy. 2. A second disadvantage with a firewall system is that it concentrates security in one spot as opposed to distributing it among systems, thus a compromise of the firewall could be disastrous to other less-protected systems on the subnet. This weakness can be countered, however, with the argument that lapses and weaknesse in security are more likely to be found as the number of systems in a subnet increase, thereby multiplying the ways in which subnets can be exploited.

1.Go to start 2.Go to setting 3.Open control panel 4.Open security center 5.Open window fire wall 6.Turn it on 7.You can turn off the fire wall temporality and don’t forget to turn it back on to stay protected from viruses 9.Microsoft windows has an automatic firewall that comes with your computer. But you can use any fire wall you want How to use fire wall

conclusion As we saw the firewall software is essential part of the computer defense against malware (viruses, trojans, rootkits, spyware, adware) and direct malicious attacks both from outside and inside of your computer. The good firewall software must be able to provide full network protection without sacrificing the speed of your computer and your network access. In order to be safe, keep in mind the following things.