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What are the major functions of a firewall?

What are the major functions of a firewall?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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**What are the Major Functions of a Firewall?** Firewalls serve as a critical component in network security by monitoring and controlling incoming and outgoing network traffic based on predetermined security rules. Their primary functions include: 1. **Packet Filtering:** Analyzing packets of data for compliance with established rules, allowing or blocking them based on source, destination, and port. 2. **Proxy Service:** Acting as an intermediary between users and the internet to prevent direct connections and improve anonymity and security. 3. **Stateful Inspection:** Tracking the state of active connections and making decisions based on the context of traffic. 4. **Next-Generation Features:** Incorporating advanced functionalities like intrusion prevention systems (IPS) and deep packet inspection to identify and block sophisticated threats. --- **I am Now Working on Packet Filtering Software. What are the Expectations that Have Been Placed on Me?** When working on packet filtering software, several expectations are typically placed on developers: 1. **Efficiency and Performance:** Ensuring that the packet filtering process does not introduce significant latency or performance degradation to the network. 2. **Accuracy:** Precisely defining rules and conditions to correctly allow or deny traffic, avoiding false positives and negatives. 3. **Security Compliance:** Implementing rules that adhere to the organization's security policies and regulatory requirements. 4. **Scalability:** Designing the software to handle increasing amounts of data traffic without sacrificing performance. 5. **User-Friendly Management:** Providing an intuitive interface for managing and updating filtering rules.
Transcribed Image Text:**What are the Major Functions of a Firewall?** Firewalls serve as a critical component in network security by monitoring and controlling incoming and outgoing network traffic based on predetermined security rules. Their primary functions include: 1. **Packet Filtering:** Analyzing packets of data for compliance with established rules, allowing or blocking them based on source, destination, and port. 2. **Proxy Service:** Acting as an intermediary between users and the internet to prevent direct connections and improve anonymity and security. 3. **Stateful Inspection:** Tracking the state of active connections and making decisions based on the context of traffic. 4. **Next-Generation Features:** Incorporating advanced functionalities like intrusion prevention systems (IPS) and deep packet inspection to identify and block sophisticated threats. --- **I am Now Working on Packet Filtering Software. What are the Expectations that Have Been Placed on Me?** When working on packet filtering software, several expectations are typically placed on developers: 1. **Efficiency and Performance:** Ensuring that the packet filtering process does not introduce significant latency or performance degradation to the network. 2. **Accuracy:** Precisely defining rules and conditions to correctly allow or deny traffic, avoiding false positives and negatives. 3. **Security Compliance:** Implementing rules that adhere to the organization's security policies and regulatory requirements. 4. **Scalability:** Designing the software to handle increasing amounts of data traffic without sacrificing performance. 5. **User-Friendly Management:** Providing an intuitive interface for managing and updating filtering rules.
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