Network Firewall and its Software
Network firewalls guard an internal computer network against malicious access from the outside. Network firewalls may also be configured to limit access to the outside from internal users. A network firewall can be implemented in a variety of ways. Organizations with a connection to the internet or any other untrusted network must implement a trustworthy firewall solution for blocking the unauthorized access.
A firewall consists of a router, multilayer router, single computer, multiple computer running firewall software and hardware to provide the firewall functionalities. A network firewall protects a computer network from unauthorized access. Network firewalls may be hardware devices, software programs, or a combination of the two.
The major functionalities of the firewall are the user authentication, logging, monitoring incoming/outgoing traffic and reporting. The most common form of network firewall is a proxy server which act as an intermediary between internal computers and external networks by receiving and selectively blocking data packets at the network boundary. These network firewalls also provide an extra measure of safety by hiding internal LAN addresses from the outside Internet. In a proxy server firewall environment, network requests from multiple clients appear to the outsider as all coming from the same proxy server address.
Some of the top Network Firewall Software are mentioned below as :
Zone Alarm : Zone alarm is a well known firewall software and it provides protection against the hackers, data theft, pop ups, viruses and other security breaches on the internet.
Outpost Firewall Pro : Outpost firewall pro provides protection against the unauthorized access, intruders, spyware, network attacks and malicious software.
Norton Personal Firewall : Norton Personal Firewall software is well known firewall software. The key features are filtering the outgoing and incoming internet traffic, defense against viruses, Trojan horses, viruses, pop ups and other internet threats.
McAfee Personal Firewall Pro : McAfee Personal Firewall Pro is award winning software that defends your business against the unauthorized access, viruses, hackers and internet spasm.
Bull Guard : Bull Guard Internet security 7.0 has all the security features, which your computer requires. The main features includes spam filter, firewall, anti spyware, antivirus and all in one security features.
Sygate Personal Firewall: Sygate Personal Firewall provides multilayer security for the network, operating system, content, applications and internet access. The advanced features provide protection against the intruders, Trojan horses and DOS attacks.
Panda Platinum Internet Security: Panda Platinum Internet Security protects your confidential information and keeps the hackers out. The key features include antivirus, anti spyware, anti phishing, firewall, identity protect, backup, anti spam and parental control.
Most of the network firewall software uses the preconfigured rules to filter out the incoming and outgoing traffic. The common methods on which firewall software works are packet filtering, stateful packet inspection and applications gateway/proxies.
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