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The Firewalls Role In Cybersecurity & How To Choose The Best

Firewalls are essential to cybersecurity as a barrier between your network and the outside world. There are numerous factors to consider when selecting the proper firewall. In this blog, we will look at the role of firewalls in cybersecurity and how to choose the best one for your organization. Thus, a firewall is a security device toolkit that protects your network.

Especially from unauthorized access to private data. Firewalls also secure computers from malicious software, creating a barrier between secure internet, internal networks, and untrusted outside networks. They deliver different protection levels depending on your client’s security needs. For over 25 years, they have offered the first line of defense in network security.

A firewall’s role in cybersecurity is to act as a barrier between a network and the internet, monitoring and controlling incoming and outgoing traffic to prevent unauthorized access and cyber threats. Firewalls can be implemented in a variety of ways, including hardware or software-based solutions, and can include features like packet filtering, intrusion detection, etc.

As well as data theft prevention and application-level filtering. In most cases, firewalls serve as traffic controllers, managing and validating your client’s network access. Most operating systems and security software have a pre-installed firewall. With that in mind, let’s learn more about firewalls’ role and the cybersecurity benefits at large for businesses and organizations.

Understanding The Firewalls Role In Cloud Computing Cybersecurity

To enumerate, Firewalls are network security devices either hardware or software-based that monitor all incoming and outgoing traffic. Based on a defined set of security rules, it accepts, rejects, or drops that specific traffic. It also accepts — allows the traffic or leaves (blocks) or declines the traffic but replies with an “unreachable error” with no reply.

It establishes a barrier between secured internal networks and outside untrusted networks, such as the Internet. That was before Firewalls; network security was performed by Access Control Lists (ACLs) on routers. ACLs determine whether network access should be granted or denied to a specific IP Address but cannot determine the nature of the blocking packet.

Also, ACL alone cannot keep threats out of the network. Hence, the Firewall was introduced. Connectivity to the Internet is no longer optional for organizations. However, accessing the Internet benefits the organization and enables the outside world to interact with the organization’s World Wide Web (WWW) internal network. This creates a threat to the organization.

As you can see, we need a firewall to secure the internal network from unauthorized traffic. So, what are the most common types of firewalls and their role types in cybersecurity? As we mentioned, a firewall is a network security system. It monitors and controls network traffic based on predefined security rules. Its primary function is to prevent unauthorized access.

While, at the same time, allowing legitimate traffic to pass through. Firewalls can help identify the signatures of dangerous users or applications and send alerts in case of an intrusion. Your cybersecurity team can act proactively on such information to nullify threats before they cause any damage to your client’s networks and devices.

How Firewalls In Cybersecurity Powers Up Cloud Computing Technology

In most cases, Firewalls match the network traffic against the rule set defined in its table. Once the rule is matched, associate action is applied to the network traffic. For example, rules are defined as any employee from HR who cannot access the data from the code server. At the same time, another rule is defined, like a system administrator can access the data.

Especially from both HR and technical departments. Rules can be defined on the firewall based on the necessity and security policies of the organization. From the perspective of a server, network traffic can be either outgoing or incoming. Firewalls maintain a distinct set of rules for both cases. The outgoing traffic originating from the server itself is allowed to pass.

Still, setting a rule on outgoing traffic is always better to achieve more security and prevent unwanted communication. Incoming traffic is treated differently. Most traffic that reaches the firewall is one of these three major Transport Layer protocols- TCP, UDP, or ICMP. These types have source and destination addresses, and TCP and UDP have port numbers.

ICMP uses a type code instead of the port number, which identifies the purpose of that packet. Regarding default policy, it is challenging to cover every possible firewall rule explicitly. For this reason, the firewall must always have a default policy. Default policy only consists of action (accept, reject, or drop).

How To Choose The Right Firewalls Types To Drive Your Security Plan

Firewalls typically welcome incoming connections that are allowed to access a network. The security systems will allow or block data packets based on existing security rules. Firewalls build checkpoints that filter web traffic. These systems let you review and act upon rogue network traffic before the attacked network experiences adverse effects.

With a dependable firewall, only trusted sources and IP addresses can access your client’s systems. Some firewalls can also monitor audit logs to find connections and traffic that have gotten through. Use firewalls to gate the borders of private networks and the host devices. Ensure that you include robust firewalls when setting up user access controls.

You can set up these barriers on user computers or dedicated computers on the network. Suppose no rule is defined about SSH connection to the server on the firewall. So, it will follow the default policy. If the default policy on the firewall is set to accept, then any computer outside of your office can establish an SSH connection to the server.

Resource Reference: Mozilla VPN | #1 Devices Security, Reliability & Speed Tool

Therefore, selecting the default policy as a drop (or reject) is always a good practice. With firewalls, Managed Service Providers (MSPs), for example, can remove the guesswork from host-level protection. Firewalls with an integrated intrusion prevention system will block malware and application-layer attacks. In addition, they react quickly and seamlessly to detect attacks.

More so throughout your network. There are several factors to consider when selecting a firewall. Consider your essential features, such as intrusion detection and prevention, URL filtering, and VPN support. Check that the firewall is compatible with your existing systems and applications. There are a few things to, always keep in mind, in your business firewall plan.

Things like:
  • Scalability: Select a firewall that can scale with your company and handle increasing traffic.
  • Support: Look for a vendor who provides dependable customer service, such as maintenance, updates, and troubleshooting.
  • Budget: Consider the firewall’s cost, like the initial purchase price, ongoing maintenance, and additional licensing fees.

Businesses and organizations need firewalls to enjoy faster response times and an enhanced capacity to handle traffic loads. You can quickly update your network’s security protocols using only authorized devices. Remember, you can always select the best firewall for your organization’s specific cybersecurity needs by carefully considering the above and other related factors.

The Main Firewalls Benefits In Strategic Cybersecurity Solutions Plan

First, a firewall monitors unwanted traffic attempts to access your client’s operating system. They form barriers between computers and other networks. Organizations can improve network security by utilizing VPNs (Virtual Private Networks) in their strategy, like NordVPN, which encrypts internet traffic and provide an extra layer of protection against cyber threats.

In addition, nordVPN code YouTube has many resources, including tutorials and product reviews. Something that can assist individuals and organizations in learning more about firewalls, VPNs, and other cybersecurity tools. Firewalls are also helpful when you need to block application-layer attacks and malware. They are invaluable for detecting and combating rogue activity.

Specifically throughout your network. Adopting a firewall for your client’s security infrastructure helps you set up their network with specific policies blocking or allowing traffic. Firewalls also provide enhanced security levels for vulnerable networks: Unauthorized users won’t be able to access private networks when you have firewalls in place.

Equally important, firewalls will also secure networks against phishing attacks and other malware invasions. Business-grade firewalls will block outflowing data when it notices a social engineering attack. In addition, you’ll receive email filtering capabilities to identify and block red flags on incoming emails. Firewall security is classified into three essential components.

Let’s elaborate much further:
  • Hardware Firewalls are physical devices installed between your network and the outside world to protect all devices.
  • Individual Devices, such as laptops or desktop computers, are protected by software firewalls installed on them.
  • Cloud-based Firewalls are in the cloud to provide similar functionality to hardware firewalls for scalability and flexibility.

Furthermore, firewalls can be classified according to their mode of operation, such as packet filtering, stateful inspection, and application-level gateways. Each type of firewall has advantages and disadvantages, and which to use depends on your organization’s specific cybersecurity needs and safety measures strategy.

The Most Common Firewall Generation Types To Know About

On the one hand, hardware firewalls are physical devices installed between your network and the outside world to protect all connected devices. On the other hand, software firewalls are installed on individual devices, such as laptops or desktop computers, to defend them. Lastly, there are also the cloud-based firewalls — these are hosted in the cloud.

They offer similar functionality to hardware firewalls — but with greater scalability and flexibility. Firewalls can also be classified based on their operation, such as packet filtering, stateful inspection, and application-level gateways. Each type of firewall has benefits and drawbacks, and which one to use depends on your organization’s specific cybersecurity needs.

Network security firewalls are invaluable in web traffic management as they minimize the spread of web threats. In general, firewalls could either be software or hardware devices. On the one hand, software firewalls are computer programs that you can install on user devices. They monitor and regulate network traffic through port numbers and applications.

On the other hand, hardware firewalls are the equipment you establish between your client’s network and the gateway. Firewalls often differ based on structure, functionality, and traffic filtering methods. The most common firewalls include:

A. Host-based Firewalls

A host-based firewall is installed on each network node which controls each incoming and outgoing packet. It is a software application or suite of applications that comes as a part of the operating system. Host-based firewalls are needed because network firewalls cannot protect a trusted network. Host firewall protects each host from attacks and unauthorized access.

B. Network-based Firewalls

Network firewall function on the network level. In other words, these firewalls filter all incoming and outgoing traffic across the network. It protects the internal network by filtering the traffic using rules defined on the firewall. A Network firewall might have two or more network interface cards (NICs). A network-based firewall is usually a dedicated system with proprietary software installed.

1. Packet-Filtering & Proxy Firewalls

The most basic type of firewall examines and filters each packet of data that passes through the network based on predetermined criteria such as IP address, port number, and protocol type. There is also HTTP & FTP Firewalls.

The HTTP & FTP Firewall at the application level operates at the network’s layer and monitors specific protocols. HTTP and FTP application protocols ensure that only authorized requests are allowed. Proxy Firewall acts as an intermediary between the client and server, filtering traffic based on its rules and policies.

With a proxy service, network security systems are secure. Your client’s networks are secure while filtering messages at the application layer. This early firewall device serves a specific application as a gateway from one network to another. The device prevents direct connections outside the network, delivering content caching and security.

 2. Packet Filtering & Generation Packet Filtering Firewall

Packet filtering firewalls analyze small amounts of data before distributing it according to the filter’s standards. This firewall will assess the packets’ source and destination addresses before allowing or blocking their transfer. Packet filtering also monitors the application protocols of data transfer before making a decision. We can further divide it into these categories.

2.1. First-Generation Firewalls

Packet filtering firewall controls network access by monitoring outgoing and incoming packets and allowing them to pass or stop based on source and destination IP addresses, protocols, and ports. It analyses traffic at the transport protocol layer (but mainly uses the first 3 layers). Packet firewalls treat each packet in isolation.

They cannot tell whether a packet is part of an existing stream of traffic. Only It can allow or deny the packages based on unique packet headers. The packet filtering firewall maintains a filtering table that decides whether the packet will be forwarded or discarded. The packet packages from the given filtering table will be filtered according to various rules.

Consider the following rules:
  • One: The incoming packets from network 192.168.21.0 are blocked.
  • Two: The incoming packets destined for the internal TELNET server (port 23) are blocked.
  • Three: The incoming packets destined for host 192.168.21.3 are blocked.
  • Lastly: All well-known services to the network 192.168.21.0 are allowed.
2.2. Second-Generation (Stateful Firewalls)

A stateful inspection firewall filters packets and keeps track of the connection state between the sender and receiver to prevent unauthorized access. Stateful firewalls (performs Stateful Packet Inspection) can determine the packet’s connection state, unlike Packet filtering firewall, which makes it more efficient. It keeps track of the state of networks connection traveling across it, like TCP streams. So the filtering decisions would be based on defined rules and the packet’s history in the state table.

2.3. Third-Generation Firewalls

The application layer firewall can inspect and filter the packets on any OSI layer up to the application layer. It can block specific content and recognize when particular applications and protocols (like HTTP and FTP) are misused. In other words, Application layer firewalls are hosts that run proxy servers. A proxy firewall prevents direct connection.

In particular, each packet must pass through the proxy between either side of the firewall. It can allow or block traffic based on predefined rules. Note: Application layer firewalls can also be used as the Network Address Translator(NAT), to be precise.

2.4. Next-Generation Firewalls (NGFW)

Similarly, Next-Generation Firewalls (NGFWs) offer application-level inspection for all the data packets. They can create policies that boost the network security of your clients. Additionally, they can conduct quick network assessments to alert you to invasive or suspicious activity. These firewalls offer application awareness and control to find and block risky apps.

Deploying these firewalls gives your clients access to techniques that effectively deal with evolving security threats. Next-generation firewalls feature both standard firewall capabilities as well as integrated intrusion prevention. Next-Generation Firewalls are being deployed to stop modern security breaches like advanced malware attacks and application-layer attacks.

NGFW consists of Deep Packet Inspection, App Inspection, SSL/SSH inspection, and many functionalities to protect the network from these modern threats. In other words, this is a higher-level firewall that combines traditional packet filtering with intrusion detection and prevention, app control, and other security features to provide comprehensive cyber protection.

What The Term Magic Firewall In Cloud Computing Security Means

“Magic Firewall” is a term used to describe a security feature provided by the web hosting and security company Cloudflare. It is a cloud-based firewall that protects a wide range of security threats, including DDoS attacks, SQL injections, cross-site scripting (XSS), and other attacks targeting web applications. The Magic Firewall works by analyzing traffic to a website.

And they are using a set of predefined rules to identify and block malicious traffic. The rules are based on threat intelligence from various sources, including the company’s threat intelligence network. Website owners can customize them to meet their specific security needs. The Magic Firewall is considered “magic” because it is designed to work seamlessly.

As well as invisibly for website visitors without any noticeable impact on website performance. It is also easy to set up and manage and can be accessed through Cloudflare’s web-based control panel. Overall, the Magic Firewall is a powerful security tool that provides website owners additional protection, in particular, against various security threats.

This means leveraging network firewalls is a must-have strategy for all businesses and organizations. Proper firewall setup and maintenance are essential to secure your client’s network. Are you looking to make the most of your firewall?

Here are some best practices to follow:
  1. Use up-to-date antivirus software: Firewalls work well in synergy with other security solutions. Adding antivirus software to your client’s network security ensures you can easily disable and resolve diverse security threats.
  2. Update your firewall regularly: Always install firmware patches to ensure that your firewall can deal with emerging vulnerabilities. Check the network’s configuration and compatibility to get updates that ease into existing security solutions.
  3. Create active network redundancies: Security breaches often result in costly client downtime. Build active data backups to prevent data loss when security threats breach your firewalls so that you can minimize downtime.
  4. Use allowlists to limit network accessibility: Create an allowlist of trusted IP addresses to keep out untrusted inbound and outbound connections. Also, minimize user access privileges to create a proactive security approach. You can also limit cross-communication internally with segmented networks to prevent lateral movement by malicious cybercriminals.

Real-Time Firewalls Use Examples


  1. Corporate networks: Many businesses employ firewalls to guard against unwanted access and other security risks on their corporate networks. These firewalls can be set up only to permit authorized users to access particular resources or services and to prevent traffic from specific IP addresses or networks.
  2. Government organizations: Government organizations frequently employ firewalls to safeguard sensitive data and to adhere to rules like HIPAA or PCI-DSS. They might use advanced firewalls like Next-generation firewalls (NGFW), which can detect and stop intrusions and manage access to detailed data and apps.
  3. Service providers: Firewalls are used by service providers to safeguard their networks and the data of their clients, including ISPs, cloud service providers, and hosting firms. They might use firewalls that accommodate enormous traffic volumes and support advanced features such as VPN and load balancing.
  4. Small enterprises: Small firms may use firewalls to separate their internal networks, restrict access to specific resources or applications, and defend their networks from external threats.
  5. Networks at home: Many home users employ firewalls to guard against unwanted access and other security risks. A firewall that many routers have built-in can be set up to block incoming traffic and restrict access to the network.

In terms of Industrial Control Systems (ICS), firewalls safeguard industrial control systems against illegal access and cyberattacks in many vital infrastructures, including power plants, water treatment facilities, and transportation.


The Notable Advantages


  1. Protection from unauthorized access: Firewalls can be set up to restrict incoming traffic from particular IP addresses or networks, preventing hackers or other malicious actors from quickly accessing a network or system — protection from unwanted access.
  2. Prevention of malware and other threats: Malware and other threat prevention: Firewalls can be set up to block traffic linked to known malware or other security concerns, assisting in the defense against these kinds of attacks.
  3. Control of network access: By limiting access to specified individuals or groups for particular servers or applications, firewalls can restrict access to specific network resources or services.
  4. Monitoring of network activity: Firewalls can be set up to record and keep track of all network activity. This information is essential for identifying and looking into security problems and other kinds of shady behavior.
  5. Regulation compliance: Many industries are bound by rules that demand the usage of firewalls or other security measures. Using a firewall, organizations can comply with these rules and prevent fines or penalties.
  6. Network segmentation: Using firewalls to split a more extensive network into smaller subnets reduces the attack surface and raises the security level.

The Main Disadvantages


  1. Complexity: Setting up and keeping up a firewall can be time-consuming and difficult, especially for more extensive networks or companies with a wide variety of users and devices.
  2. Limited Visibility: Firewalls may not be able to identify or stop security risks that operate at other levels, such as the application or endpoint level, because they can only observe and manage traffic at the network level.
  3. False sense of security: Some businesses may rely excessively on their firewall and disregard other crucial security measures like endpoint security or intrusion detection systems.
  4. Limited adaptability: Because firewalls are frequently rule-based, they might not be able to respond to new security threats.
  5. Performance impact: Network performance can be significantly impacted by firewalls, mainly if they are set up to analyze or manage a lot of traffic.
  6. Limited scalability: Because firewalls can only secure one network, businesses with several networks must deploy many firewalls, which can be expensive.
  7. Limited VPN support: Some firewalls might not allow complex VPN features like split tunneling, which could restrict the experience of a remote worker.
  8. Cost: Purchasing many devices or add-on features for a firewall system can be expensive, especially for businesses.

In Conclusion;

Firewalls play a critical role in cybersecurity by preventing unauthorized access and protecting networks from cyber threats. Organizations should consider their specific security needs, budget, and scalability requirements to choose the proper firewall. It is essential to regularly update and monitor firewalls to provide adequate protection against evolving cyber threats.

Networks that lack protection are often vulnerable to attacks. It is always helpful to vet network traffic to determine whether they are harmful. Once users connect personal computers to IT systems or the internet, they open the door to many potential threats. Combining resources and simplified online collaboration can come with the risk of network intrusion.

Users often face the risk of hacking, identity theft, and online fraud when they expose their devices to other networks. Rogue cybercriminals can subject networks and devices to repeated threats. Easily accessible internet connections increase the risk of such network attacks. Firewalls offer proactive protection, allowing you to surf the internet with a higher degree of safety.

You can use them to filter out many potential threats on client networks. As cybercriminals find new ways of breaching networks, businesses need robust network security solutions to secure their networks. Do you need help setting up firewalls for your clients? Partner with us for reliable network security solutions. Also, learn more about Datto Networking Routers in detail.

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