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Network firewall protection is paramount in today’s digital landscape, where cyber-attacks constantly threaten businesses. Protecting your network infrastructure from unauthorized access and malicious activities is critical to safeguarding sensitive data and preserving the integrity of your operations. But what is network firewall security?

Network firewall protection uses specialized technology and strategies to create a protective barrier between an internal network and external threats. Such a firewall acts as a first line of defense by monitoring incoming and outgoing traffic based on predefined rules or policies.

In this article, we delve into network firewall shields. We will explore its different types and purposeful usage in securing networks against potential breaches. Moreover, we’ll understand that it matters for anyone looking to ensure maximum protection for their valuable information assets.

What Is Network Firewall Security?

Network firewalls are essential security solutions that protect networks from unauthorized or unwanted traffic. By adopting network firewall security, businesses can prevent malware and unauthorized access to private networks, including intranets.

This security measure uses robust policies to limit or block illegal access attempts while allowing only authorized network traffic. Network firewall configuration ensures data passing through is thoroughly verified for compliance with security standards.

Additionally, network firewall security implements secure authentication certificates and logins for remote access management. This leads us to the two main types of network firewalls: Software Firewalls and Hardware Firewalls. Now, let’s delve into them.

Software vs. Hardware Firewalls

A firewall is an endpoint protection technology that defends against unauthorized access attempts. It’s an essential first line of defense for private information, but only some security is needed.

Hardware firewalls are standalone products or built-in components of routers or other networking devices. They are commonly used in corporate environments to defend networks from unauthorized access. These robust solutions often feature multiple network ports connecting various systems within more extensive networks.

software vs. hardware firewalls

On the other hand, software firewalls can be installed on individual computers or provided by operating system (OS) or network device manufacturers. While they offer customization options, their control and protection features may differ from those of their hardware counterparts regarding more sophisticated attacks.

Both types have their merits. However, using them together is typically recommended for comprehensive network security coverage. A combination approach ensures excellent reliability through overlapping layers of protection across different points within the system architecture.

What Are the Different Types of Firewalls?

Choosing the proper firewall security is crucial. There are five important types to consider: packet filtering, circuit-level, stateful inspection, next-generation, and application-level firewalls. Learn more about their features and benefits below.

  • Packet Filtering Firewall

A Packet Filtering Firewall is a security feature that controls data flow in and out of a network. It examines each packet to ensure it adheres to predefined rules.

While it may not suit every situation, this cost-effective option can be the best solution for certain scenarios. It can test packets based on specific criteria, like source or destination addresses. With this, packet filtering provides additional protection for your network traffic.

  • Circuit-Level Gateway

A Circuit-Level Gateway firewall operates between different OSI model layers, including the session layer. It helps detect and monitor malicious activities by examining the User Datagram Protocol (UDP) and Transmission Control Protocol (TCP).

However, it’s important to note that Circuit-Level Gateways should be combined with other systems for comprehensive network protection.

  • Application-Level Gateway

An Application-Level Gateway is a firewall known as an Application Layer proxy that acts as the network’s sole entry and exit point. These firewalls effectively protect against web threats, ensuring the safety of enterprise data. They offer an extra layer of protection to safeguard sensitive information.

  • Stateful Inspection Firewall

A Stateful Inspection Firewall manages network traffic, ensuring packets are part of an established TCP or other network. It examines sources, destination addresses, IP flags, and port numbers to track every detail carefully.

With its thorough analysis capabilities and attention to packet evaluation, this firewall provides crucial security measures for protecting networks from potential threats.

  • Next-Generation Firewalls

Next-Generation Firewalls (NGFWs) go beyond traditional firewalls. They conduct deep-packet inspection and incorporate stateful inspection, malware filtering, antivirus, and IDS/IPS.

These advanced firewalls bring intelligence from outside the network to make real-time decisions based on application-level analysis. Hence, businesses can seamlessly use NGFWs as an intrusion prevention system.

what is a network firewall used for

What Is a Network Firewall Used For?

Network firewalls are essential security tools for both individuals and organizations. They serve multiple purposes. These purposes go beyond protecting against external threats, such as

  • Guarding against internal risks
  • Creating segmentation between the outside world and an organization’s network

Firewalls constantly monitor network activity to ensure maximum protection by:

  • Tracking events
  • Updating rules
  • Filtering traffic
  • Alerting users to possible intrusions

Firewalls are particularly useful for always-on connections like DSL that require static IP addresses. That’s because they provide a necessary layer of security.

Firewalls also play a foundational role in securing networks from unauthorized access or malicious activities entering or exiting the system. Moreover, they handle tasks like login management and auditing.

The benefits extend even further when combined with other cybersecurity services within an organization’s security information and event management strategy (SIEM).

Why Network Firewalls are Important

Network firewalls are crucial for protecting systems from external threats. Cybercrime has increased by 600% since 2015, highlighting the importance of strong security measures. Human error is accountable for 88% of data breaches, emphasizing the need for robust firewall protection.

Many organizations face a shortage of cybersecurity skills (51%), making it vital to prioritize network firewall implementation. Over 30% of companies utilize over 100 network firewalls and use cloud-based solutions. Hence, it’s evident that firewalls play a pivotal role in safeguarding sensitive information and preventing unauthorized access.

By analyzing network traffic and applying established rules and filters, firewalls act as an initial barrier against potential threats.

How Does Network Firewall Security Work?

Network firewall protection is a packet-scanning security device that examines inbound and outbound data traffic. Such firewalls employ predefined rulesets for inspection to filter out malicious activities efficiently. Besides, they allow benign ones to pass through unhindered.

These rules focus on critical elements, such as

  • The source of incoming packets (where they originate from)
  • Their content (whether they contain any suspicious code or anomalies)
  • Their intended destination within the protected network

These focal points might have nuanced representations specific to each level. However, it depends on different levels of networks within an organization’s infrastructure framework, like secure zones or subnets.

What Are the Components of a Firewall?

A firewall comprises hardware and software components that protect your network from cyber threats. The hardware component includes a dedicated processor or device that runs the firewall’s software capabilities.

what are the components of a firewall

The software component incorporates various technologies to enforce security controls on incoming and outgoing data traffic. Let’s take a look at them.

  • Real-time monitoring is a technology that constantly checks the traffic entering the firewall.
  • Internet Protocol (IP) packet filters are another crucial feature of firewalls. They examine each data packet for potential threats before allowing or blocking its passage.
  • Firewalls also utilize proxy servers as intermediaries between your computer/network and the internet. They control which websites users can access while keeping out potentially harmful sites.
  • Virtual Private Networks (VPNs) act as proxy firewall servers, encrypting and forwarding data securely between different locations.
  • Network Address Translation (NAT) changes IP addresses on packets passing through the firewall so multiple hosts can use a single IP address for internet connectivity.

Additionally, firewalls may incorporate features like

  • SOCKS servers to route client traffic efficiently
  • Relay services enabling inspection against malicious email content
  • Split Domain Name System (DNS), segmenting internal/external usage with individual monitoring capabilities
  • Logging functionalities are essential for reviewing network activity history regarding attempted access violations or outbound malicious transmission purposes.

Benefits of a Network Firewall

Several key benefits can be gained from using a firewall based on the network.

  • Firstly, it protects essential networks against external threats and unauthorized access attempts. By setting up a firewall, you can safeguard your systems and prevent sensitive data from being unlawfully extracted.
  • Another significant benefit is the ability of firewalls to shield networks from internet viruses and malware. Installing a firewall helps detect malicious software before it has the chance to download onto your computer system. This ensures that confidential files remain secure.
  • Additionally, firewalls are essential to managing a network’s processing capabilities. By blocking unwanted or suspicious data packets, networks can process information more efficiently while preserving their availability for connecting with other systems.
  • Furthermore, modern firewalls enable seamless integration with outside companies’ cloud storage services while guarding against unauthorized access to such remote data repositories.

Disadvantages Of Network Firewall Security

While a firewall security system based on networks offers numerous benefits, it is also essential to consider its disadvantages.

  • One key drawback is the cost associated with implementing and maintaining hardware firewalls. They can be more expensive than software firewalls and require specialized IT expertise for complex configurations.
  • Another disadvantage of such firewall security lies in its restrictive nature. While this ensures protection against unknown traffic, strict firewall policies may limit employees from performing specific tasks, hampering overall productivity for larger organizations.
  • Performance can also be affected by network firewalls, particularly software-based ones that constantly run in the background. This constant monitoring can consume system resources such as RAM and processing power, decreasing device performance.

Cost Of Network Firewall Security

Network firewall shield costs vary based on organization size and firewall type. For small-medium businesses, a Hardware Firewall can range from $700 to $1,000. However, for larger companies with around 100 users, the price may increase from $1,500 to $4,000.

Additional factors influencing pricing include:

  • Make, model, and features of the firewall.
  • Capacity and performance requirements.
  • Redundancy options are available.
  • Cost of support subscriptions and security services.
  • Maintenance costs for configuration monitoring and integration.

The overall cost depends on user count, location coverage, and workload requirements. Typically, firewall licenses are purchased for 1-3 years (with license renewal), costing 2-3 times more than hardware firewalls. So, if a small appliance costs around $700 initially, it could reach approximately $1,500 over a three-year term.


In conclusion, network firewall protection is essential to protecting businesses from cyber threats. Whether through packet filtering or next-generation firewalls, these devices ensure that incoming and outgoing network traffic is monitored and protected. It’s crucial to stay updated on the evolving landscape of cybersecurity to adapt to new challenges effectively.

At Crown Computers, we understand the importance of a robust network firewall system as your organization’s first line of defense. We offer complete solutions tailored to meet your needs and secure your networks from potential breaches. Trust our expertise in providing top-notch cybersecurity services.