There are only two real downsides to packet filtering. However, they are ideal for small networks. Larger networks should steer clear of packet filtering firewalls as use can result in complex issues with configuration. This means that most packet filtering firewalls allow the user a level of control. Packet filtering can be performed by a number of network devices and is usually implemented when you download free firewall software. Packet filtering firewalls are the most basic form of firewall protection and are able to process information via a simple sorting algorithm. The data that is gathered can then allow the packet filtering firewall to make a decision. Sometimes referred to as Layer 3 firewalls, packet filtering firewalls garner information from the source and destination addresses and ports in IP packets. However, there are actually five different firewalls available on the market. Most IT professionals are aware that two or three types of firewall that exist. To recap, firewalls are software or hardware components designed to protect networks from each other. Given time to absorb this information, we thought it time to delve into the world of firewalls once again, exploring more types of firewall and the similarities and differences between each kind. Many blogs ago, we provided an introduction to firewalls.
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