Networks in industries exist within an environment wherein regular IT equipment may encounter conditions like excessive heat, dust, moisture, vibrations, electrical noise and non-stop running. However, at the same time, industrial networks must be capable of connecting equipment which requires stable and secure communication channels.

A ruggedized firewall for industrial networks is designed to provide network protection while withstanding demanding physical conditions. Unlike typical firewalls designed mainly for use in controlled office or data center settings, rugged firewalls are designed for use near industrial machinery or remote facilities.

This article looks at ruggedized firewalls and their protection of industrial networks, the problems they solve, and the attributes companies should look out for when securing their industrial environment.

What Are Ruggedized Firewalls?

Rugged firewalls are customized security appliances that safeguard industrial networks under extreme physical conditions. They offer fundamental services of firewall such as traffic filtering, access control, network segmentation, and secure communication. 

Rugged firewalls are different from commercial or office firewalls that operate in a comfortable environment since rugged firewalls are designed for harsh physical environments like extreme temperature, vibration, dust, water and electromagnetic radiation. Rugged firewalls are ideal for use in areas such as manufacturing industries, energy facilities, transport systems, and distant industrial areas.

Why Industrial Networks Need Specialized Protection

Industrial networks are not the same as corporate networks in terms of their requirements for security and operation. Industrial manufacturing plants, energy-related infrastructure, transportation systems, utilities, and other types of industrial processes can be based on connected hardware and control systems which should always be online.

The following problems can arise in industrial environments:

• Unauthorized access to industrial systems
• Cyber attacks and other malicious software
• Insecure communication between network segments
• Hardware with low-level security features
• Severe environmental factors
• Low chances for hardware maintenance or upgrade

What Makes a Firewall Ruggedized?

A ruggedized firewall is an integration of network security functions with physical hardware suited for use in harsh operating conditions. It is engineered to facilitate secure operations in conditions where standard networking hardware cannot cope well. Depending on the intended location of deployment, ruggedized firewalls can be built to withstand:

• Extreme temperatures
• Vibration and shock
• Dust and humidity
• Electromagnetic interference
• Industrial usage all the time
• Difficult locations for installation and maintenance

These characteristics make it possible to install the security controls nearer to the industrial equipment and networking infrastructure.

How Ruggedized Firewalls Protect Industrial Networks

Traffic Control in the Network

Firewalls regulate traffic that is transferred from one part of an industrial network to another. Security policies may specify which connections are allowed, while others are not. Such actions will minimize unnecessary communication between systems and minimize possible attack paths for hackers to access important systems.

Segmentation of the Industrial Environment

An industrial network may comprise different systems like operational technologies, control systems, servers, and devices. Keeping such environments separate from each other will decrease possible consequences of any security incident. The task may be done by means of ruggedized firewalls.

Security of Remote Industrial Facilities

Not all industrial activities take place within a controlled environment. Industrial equipment can be used in substation locations, pipelines, field locations, transport infrastructure, and other remote locations.

It is possible to use rugged firewalls that are capable of providing protection at such locations while meeting the requirements to work in an environment with specific temperature, dust, vibration, or restricted physical access.

Enabling Industrial Communication Security

Industrial systems typically have to communicate with other systems, applications, and centralized management platforms. Policies can assist in enabling communication controls based on security guidelines. The organization will, hence, be able to regulate the systems that can communicate and cut down on any unneeded network visibility.

Maintaining Network Availability

Industrial systems may rely on networked systems to keep their production process going. The security systems used must protect while at the same time not cause any downtime. Rugged equipment will ensure that the security infrastructure is kept running despite the difficult operating environment.

Important Capabilities of Ruggedized Firewalls 

In choosing a ruggedized firewall for industrial usage, it is important to consider security features and physical toughness.

Advantages for Industrial Systems

Using ruggedized firewalls can offer many benefits apart from mere traffic control. The integration of security features and robust hardware makes it possible to set up protection near the industrial systems and distant networks.

The major advantages include the following:

• Increased control over the industrial network traffic
• Decreased exposure between network zones
• Remote and distributed sites protection
• Increased robustness in the harsh environment
• IT and OT network segregation support
• Network communications visibility improvement
• Higher security consistency in industrial facilities

What Businesses Should Consider Before Deployment

Prior to implementation of ruggedized firewalls, businesses need to consider the security needs and the physical setting for deployment. The following is a checklist to be considered while selecting:

• Analyze the Temperature Range: See if the firewall can function properly within the given temperature range.
• Analyze the Vibration and Shock Resistance: Think about the degree of vibration or shock that the system will be exposed to.
• Evaluate Exposure to Moisture or Dust: See if the system needs protection from moisture or dust.
• Analyze Power Availability: Ensure that there is enough power to enable proper operation.
• Analyze Connections: Figure out what kind of network connections the device will use.
• Check the Installation Space: Ensure there is enough room for installation.
• Analyze the Need for Network Segregation: See how the devices and the network zones need to be segregated.
• Formulate Access Policy: See who should have access to the critical systems and what level of access.
• Formulate Remote Access Policy: Evaluate the need for remote connectivity.
• Evaluate the Need for Monitoring and Management: See how the firewall needs to be managed and monitored.
• Evaluate the System Compatibility: Ensure that the firewall works well with industrial systems and the network.

Final Thoughts

Industrial networking needs secure solutions that will ensure the safety of sensitive communication and continue functioning under harsh physical conditions. Such firewalls have the capability to combine network security with rugged hardware. By taking into consideration environmental requirements along with security, connectivity, and manageability requirements, companies are able to use firewalls to ensure cybersecurity and the reliability of their industrial operations.

FAQs

1. What is a ruggedized firewall?

Ruggedized firewall refers to the kind of security software that can be deployed in harsh physical settings. It is basically a combination of the firewall functions with ruggedized hardware which can withstand extreme weather conditions.

2. What makes ruggedized firewalls essential in industrial networks?

There are many situations in which the industrial networks are operated that regular IT devices cannot be applied. Ruggedized firewalls offer network protection while being built to survive industrial conditions.

3. Can ruggedized firewalls support IT and OT security?

Yes, they are able to establish controlled zones for separation of IT and OT systems and control the traffic between different network zones.

4. Where are ruggedized firewalls commonly deployed?

They can be installed in factories, utility companies, energy companies, transport systems, industrial automation systems, and remote sites where the networking equipment has to survive tough environments.