A firewall can provide several important security benefits, including:
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Blocking unauthorized access: Firewalls can be configured to block incoming connections from specific IP addresses or networks, making it more difficult for hackers to gain access to a network or device.
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Filtering network traffic: Firewalls can be configured to allow or block specific types of network traffic, such as email or web traffic. This can help prevent malware or other unwanted content from entering a network.
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Protecting against attacks: Firewalls can help protect against common network attacks, such as denial-of-service attacks, by monitoring and blocking suspicious traffic.
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Compliance: Many industries are regulated and have compliance requirements that mandate use of firewalls, such as HIPAA in healthcare, PCI-DSS in payment card industry and so on.
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Monitoring: Firewalls can log and monitor network traffic, providing valuable information on who is accessing a network, what they are doing, and when they are doing it.