Internet not working

What are the compatibility issues involving Internet performance that are to be taken account of when installing a firewall software on a system?


Firewall is a software program used to prevent unauthorized access to system information and data by someone who don't have right of access to such data and information, while using the Internet. Microsoft provides a firewall with Windows operating system. Windows firewall is a software component providing security barriers and packet filtering functions. Microsoft introduced firewall in Windows XP and Windows 2003 server. You can also get plenty of third party firewalls from the market. Firewall techniques are available in various formats like Packet filter, application gateway, circuit level gateway, proxy server etc. Sometimes the Internet stops working after installing a firewall in the system. It is because, it blocks the accessing of the particular site.


Information regarding why Internet stops functioning suddenly after installing a firewall, its causes and tips to fix this issue:




  • Internet stops working

  • Causes behind these issues

  • Tips to fix these issues



Internet stops working



Sometimes the Internet stops working after installing a firewall in the system. Firewall is a computer program which is used to block unauthorized access while permitting authorized communications. Every message passes through the firewall, which inspects each message and blocks those that do not meet the specified security criteria.



Causes behind these issues



If you try to access a web page which doesn't fall within the specified criteria of the firewall, it disrupts the working of the Internet. Some Internet security software also contain firewall. If you have installed this Internet security software in your system, you may also face such issues. Norton Internet Security is a Internet security software which contains a firewall.



Tips to fix these issues


You can avoid these issues while using Internet by configuring the firewall that you have installed in the system. You can access the web pages which are blocked by the firewall by adding exceptions. To add exceptions in your Windows firewall, select 'Control panel' from start menu. Double click on the 'Windows Firewall' icon from the Control Panel to view the firewall Window. Select the 'Exceptions"' tab at the top of the firewall dialog box. Click on the 'Add Program' button and choose your Internet browser and then click 'OK'.




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