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• Sygate® Personal Firewall PRO
  Symantec had already sacked this product out of the distribution market. Sygate PF PRO offered a solid protection for networks in home set ups. The software is also capable of logging every network activity and has automatic notifications via electronic mail.
• ZoneAlarmâ„¢ PRO
  This product is from Zone Labs. It is proprietary personal firewall software but there is also an available free downloads. The ZoneAlarmâ„¢ PRO has additional protection features like those that are similarly attached to antivirus software, ICS/NAT support and password protection. One of the best things that this product provides to your computer is that this software is running in a Stealth Mode, literally making your computer invisible.

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Firewalls are often seen mainly as security utilities that help to keep malicious users out of computer networks. However, a more accurate description of firewalls is they are tools used for deterrent and enforcement of security measures meant to provide effective and efficient data, application and even network connection protection.

We are in a point in time where the smallest bit of data can be used as an advantage that can be transformed to billions of profit for a single enterprise. This is the reason that businesses have made securing communication networks a priority and an integral part of their practices. Firewalls help these enterprises to maintain the integrity of their data and keep their marketing secrets away from potential dangers.

Our personal home network is always prone to system attacks by malicious intruders. There is a strong need to protect the systems. We address to assure protection of our personal systems by setting up personal firewall. Below is a list of top personal firewall software that offers competitive network protection and maintain your personal privacy while surfing the web.

• BlackICEâ„¢ PC Protection
  This product is the first-ever mainstream firewall software and has always remained to be the top choice personal firewall. The success of the software can be attributed to its quality UI or user interface, and its powerful logging capability.

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A perfect personal firewall is characterized as inexpensive and easy to install and use with clearly defined configuration options and the ability to hide all ports that will make your computer system invisible from PC scans. Another important characteristic is that is alerts you of serious attacks and ensure that there are no unauthorized entries to your computer system.

Microsoft Windows firewall is usually the choice because it is bundled with the Microsoft Windows Operating System (Vista and XP Service Pack 2 editions) and is usually turned on by default in order to block incoming threats from the Internet. Until you have a decent third party firewall replacement, this built-in feature in Windows should be left turned on.

With the growing dependence on the Internet and the introduction of more web based applications that are fast becoming an integral part of everyday computing, the need to secure home and business networks from vulnerability from Internet based attacks become more of a necessity. In this regard, the inception of firewall-enabled routers is becoming more prominent. These types of broadband routers which come equipped with firewall protection and provides high-speed access to the Internet to multiple users via cable of DSL modems is the latest in securing home and business networks. The basic firewall option of these routers includes support for NAT, DHC, and DNS services in real time IP addressing allocation and also filtering of static IP which allows quick management of Internet services.

The proxy server is combined with a firewall for additional protection. The job of the proxy server is to retrieve requested web pages and send it to the requesting computer. The proxy server is like a messenger where the sending computer never interacts with the requesting computer and vice versa. This can help make your Internet connection efficient because the proxy server caches the web pages which allow it to load faster next time.

A DMZ or DeMilitarized Zone is an area outside of your firewall. It is like an unsecured area where you can allow items which do not need protection to remain. To setup the DMZ for multiple computers, just place one of the computers between the Internet access and your firewall. Some new firewall applications allow users to designate a directory on the gateway to act as DMZ.

The firewall is your network or computer’s first line of defense against external attacks which are meant to gain access to critical information. In order to be truly effective, system administrators and computer owners can implement various types of firewall techniques to fortify their defenses against malicious attacks. Common types of firewall techniques are:
1.Packet Filter- inspects every packet that enters or leaves your network applying rules defined by the user
2.Circuit-Level Gateway – security mechanism applied to UDP or TCP connections
3.Application Gateway – application specific security mechanism like Telnet and FTP servers
4.Proxy Server – hides the real network address by intercepting incoming and outgoing messages that flow through the network

One of the major concerns that the newest operating system from Microsoft, Windows Vista, is addressing is better overall security. The firewall version for the Windows Vista is designed for high configurability which also allows administrators to have greater control and management of system applications. The new firewall can filter incoming and outgoing traffic which gives it the capability to block access of outside machines that attempt to connect to your computer as well as applications in the local computer that are attempting to connect to other network systems. The ability of the console to function is categorized as single-machine mode where it manages a single computer or configured to regulate policies to multiple machines.

Firewalls are basically customizable which means that you can either add or remove filters based on your existing conditions. Here are some terms that you need to be familiar with when dealing with firewalls:
• IP (Internet Protocol) addresses – unique address assigned to a network machine, usually in the format 255.255.255.255
• Domain names – there are the human readable equivalent of the IP addresses, each IP address corresponds to a certain domain name
• Protocols – this are the communication services that are used in a network or Internet connection which includes IP, TCP, HTTP, FTP, UDP, ICMP, SMTP, SNMP and Telnet
• Ports – numbered ports serve as the entry point for different services running on the network or the Internet
• Specific phrases and words – this allows the firewall application to look for specific catch words or phrases to block

A security research firm, Heise Security, is criticizing Leopard’s security, or more specifically, the system’s firewall.

The firm was highly critical and declared that the firewall failed every test. The tests revolved around Apple’s default configuration and whether the firewall configured correctly due to user input.

According to them, Leopard’s firewall is not activated by default and, even when activated, it does not behave as one should expect. Network connections to non-authorised services can still be established and even under “Block all incoming connections” , the most restrictive setting, it still allows access to system services from the internet.

Apply acknowledges that the system services that it communicated with in its tests did not seem immediately prone to exploit.