firewall security definition
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Firewall Security Definition
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Firewall protection is the one that controls and monitors the network traffic whether it is incoming or outgoing on predetermined rules of security.
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Simply saying
It is basically a barrier or a shield applied specifically to save your PC, phone or tablet from the malwares of external world that exist in abundance on the internet.
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A barrier against malwares
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Functioning in simple words
It is either a piece of hardware or a software program that helps to keep the hackers, viruses, and worms to stay away from your computer. Simply speaking it screens out all the malicious activities from our network.
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Advantages• Packet filter is used to inspect the header of the packet to know
its destination and where it came from.
• All this info is equated to judge whether the packet should be allowed or intercepted.
• Specific ports are used by the next Generation firewalls, which designed to filter the network and traffic based on internet.
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• Proxy firewall security enables protocol aware logging. This makes easy to identify any attack.
• A backup of logs is also gained by using this that exist on the servers that are protected by the proxy.
• Installed properly at a proper time saves the company or even a person a huge sum of money.
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Disadvantages
• The main function of firewalls is the restriction to a network. This can also block the legitimate users.
• The blockage of legitimate employees to access the network of the company can also lead to low productivity levels.
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• Usually, these blockages are applied using strict policies so the employees might use the backdoor methods for accessing the network.
• Also firewalls don’t protect against the internal wreckage and damage,
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• Which allows the unethical employees to take advantage of the weak points in the network.
• Hardware firewalls are normally more expensive and need specialized staff to maintain, install and monitor the operations.
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Types of attacks against which networks are protected
• IP spoofing attacks
• Denial of service attacks (DoS attacks)
• Man in the middle attack
• Firewall security is also essential in sniffer attack
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Firewall based on circuit level gatewaysadvantages
• Performance of network is not affected of affected very less.
• The direct connection between the trusted client and the untrusted host is terminated
• It possess much high level of security as compared to packet filter firewalls
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