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Introduction to Firewalls: Understanding Types, Features, and Benefits

Explore the world of firewalls with this comprehensive overview, covering types like hardware and software firewalls, their operation modes, key features such as port control and data encryption, and additional functionalities like virus protection. Learn how firewalls work, where they fall short, and why combining them with antivirus software is crucial for robust cybersecurity.

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Introduction to Firewalls: Understanding Types, Features, and Benefits

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  1. Introduction to Firewalls Edited by MOBIN

  2. Overview

  3. Overview of Firewalls • As the name implies, a firewall acts to provide secured access between two networks • A firewall may be implemented as a standalone hardware device or in the form of a software on a client computer or a proxy server • The two types of firewall are generally known as the hardware firewall and the software firewall

  4. Firewalls in Practice • A computer may be protected by both a hardware and a software firewall

  5. Mode of Operation • A firewall that stands in between two networks will inspect a packet that is ready to pass between the networks and allow or block the packet based on the rules set for the firewall to operate

  6. General Firewall Features • Port Control • Network Address Translation • Application Monitoring (Program Control) • Packet Filtering

  7. Additional Firewall Features • Data encryption • Hiding presence • Reporting/logging • e-mail virus protection • Pop-up ad blocking • Cookie digestion • Spy ware protection etc.

  8. Viruses and Firewalls • In general, firewalls cannot protect against viruses • An anti-virus software is needed for that purpose • However, many security suites such as those offered by MacAfee and Norton offer the complete protection • Some software firewalls such as Zone Alarm Pro may contain limited virus protection features

  9. A Rule of Thumb • Use the best firewall and virus protection although each may originate from a different company

  10. Hardware Firewall (Cont.) • An example !

  11. Benefits of Firewall-Summary • Prevent intrusion • Choke point for security audit • Reduce attacks by hackers • Hide network behind a single IP address • Part of total network security policy

  12. Some Software Firewalls • Zone Alarm • Microsoft Widows Firewall • MacAfee Security Suite • Norton Security Suite

  13. THE END

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