SecurityOps

  Firewalls are an essential component of network security and serve as a barrier between internal networks and the external world. They inspect incoming and outgoing network traffic and apply predefined rules to allow or block specific connections. Here are different types of firewalls and how they can protect networks: Packet Filtering Firewalls : Packet filtering firewalls operate at the network layer (Layer 3) of the OSI model. They examine each packet's header information, such as source and destination IP addresses, ports, and protocols, and apply filtering rules based on this information. Packet filtering firewalls can allow or deny packets based on specific criteria, such as IP addresses or port numbers. However, they lack the ability to inspect the packet's content, making them less effective against more sophisticated attacks. Stateful Inspection Firewalls : Stateful inspection firewalls, also known as dynamic packet filtering firewalls, combine the functionality of p...