You may think cyberattacks only happen to big companies like Target, but small businesses are vulnerable due to their limited resources and security. If you want to take steps to keep your business safe, a firewall can be a valuable tool.

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What is a firewall?

A firewall is a network security system that monitors incoming and outgoing network traffic. It allows or blocks specific traffic based on a set of predetermined security rules. A firewall protects businesses from malware, spyware, and other malicious software.

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Different types of firewalls

A firewall can keep your business safe from internal and external threats, but only if you use the correct type. Here are three different types to consider:

  • Proxy firewalls: A proxy firewall is the most secure type of firewall since it functions as an intermediary between the internal network and the internet. It monitors and filters network traffic by examining the contents of network packets at the application layer.
  • Stateful inspection firewalls: A stateful inspection firewall tracks and monitors the state of active network connections while also analyzing incoming traffic for threats. It operates at layers 3 and 4 of the Open Systems Interconnection (OSI) model. This type of firewall checks connections against specific criteria. When those criteria are met, it connects to a “state table” to enable the connection; otherwise, it rejects it.
  • Stateless packet filtering firewalls: A stateless firewall also operates at layers 3 and 4 of the OSI model, but it doesn’t store or remember information about previous data packets. Instead, it evaluates each packet on a case-by-case basis in real time to determine whether it’s authorized or unauthorized before allowing or rejecting the connection accordingly.

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For the most comprehensive cybersecurity protection, it’s best to use a firewall and antivirus software together.

Firewall vs. antivirus: What’s the difference?

Many people confuse a firewall with antivirus software, but they aren’t the same thing. The primary function of a firewall is to regulate network traffic and prevent access from unauthorized sources. In comparison, antivirus software scans files and programs for malware and removes malware from the system.

For the most comprehensive cybersecurity protection, it’s best to use a firewall and antivirus software together. Using both tools creates a layered defense, making it harder for cybercriminals to breach your system.

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Benefits of firewalls for small businesses

Firewalls are a smart step toward improving your overall security. Here are the biggest benefits of using a firewall for your business:

  • Ongoing monitoring and alerts: Firewalls continually monitor your networks and send alerts, allowing you to track and analyze your activity. The alerts they provide can help you identify potential issues before they turn into a full-blown crisis.
  • Access control: Firewalls monitor network access based on a set of predefined rules. For example, you can authorize or deny certain types of traffic based on factors such as IP addresses, port numbers, or protocols. This allows you to restrict access to sensitive company resources.
  • Virus protection: Firewalls can also detect and block network threats like malware or viruses. New viruses and threats are constantly emerging, though, so keep the system updated.
  • Cost-effective: Firewalls are a sensible option for small businesses that don’t have a lot of money to spend on security. Firewalls are available as hardware, software, or software as a service, so there are many affordable options that are available.

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How to set up a firewall for your business

Here are the steps you’ll take to set up a firewall for your business:

  • Identify security loopholes: You’ll start by identifying any security weaknesses in your network. Automated tools can scan your network for vulnerabilities, misconfigurations, and outdated software. You may also want to consider penetration testing to assess whether these vulnerabilities pose a significant risk.
  • Consider the firewall type you need: Next, you’ll decide which kind of firewall is best for your business. If you want more control over your network traffic, a proxy firewall may be your best bet — these firewalls are standard in healthcare, finance, and government sectors. However, if you’re looking for a simpler solution that balances security with performance, a stateful inspection firewall may be a better option. It provides basic network traffic filtering and protects against common cyberattacks.
  • Create firewall rules: For your firewall to work well, you need to create firewall rules that determine which traffic it will accept and block. These security protocols vary depending on the type of business you run.
  • Test and monitor your firewall: Finally, test these rules in a controlled environment to verify they work correctly. After testing your firewall, you can adjust the settings as needed. Continue to monitor your firewall and update the software to avoid any security incidents.

CO— aims to bring you inspiration from leading respected experts. However, before making any business decision, you should consult a professional who can advise you based on your individual situation.

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