The computer security is the utmost requirement of each organization. The organizations are worried about the viruses or malicious users who skip into their network and can corrupt their data.To secure their PC’s, organizations work very hard and install various anti-virus programs on their PC’s. But the main problem still persists and that is the Network Security. Installing Anti-Virus programs is no permanent remedy for the Network Threats.To secure network, installing Firewalls is a good and reliable option. The organizations can block many security threats using some solid firewall programs. Below is the list and description of various Firewall programs that you can install and use to secure your network from any intimidations: 1. Zone Alarm: This is the most recommended firewall program to stop the network intrusion. It is very fast and lets you know if any one tries to invade your network. The moment non-concerned person tries to enter your network it will let you know via Pop-Up and then you can designate your safer applications and can resist other applications that are not known to you. You can download and run a trial version but it has some limited options which are more than enough for the basic security. But if high quotient of security is required, paid version is recommended.2. Black ICE PC Protection: This is the most recommended Firewall program for the network security. This was the first mainstream firewall program and is most widely used till date. This is a perfect product choice both for the advanced network users and beginners. It provides a high quality user interface, log in facilities and it has some settings that can be configured to stop some specific network addresses for security purposes. The users are granted for periodic updates till one year after the purchase of product.3. Comodo Firewall Pro: This firewall program alerts the network administrator based on the analysis of regular applications. It keeps a track of daily applications and if detects any alteration, the malicious act is suspected. It alerts the administrator based on this strange and suspicious detections. Its User Interface is friendly and each security alert is followed by the instructions that are needed to proceed further. Its Pro version is free for life time.4. Symantec Norton Personal Firewall 2004: Symantec is the key player in security. It provides many solutions for the computer and network security. This product is also much recommended but many users do not find its user interface so easy to use. It has many features that simplify the administration of security across LAN. This is much recommended for use as it is from a very reputable company that deals in security only.5. NetVeda Safety. Net: This is also a solid firewall program and lets you designate your safe applications. It allows you to have a complete watch on your network for any intrusion. Its security alerts could be bit confusing for the beginners and it is mainly directed to advanced users. You can set your own controls for this application.