Blog

Jun 05, 2023

Understanding Firewalls

A firewall is a security device that controls the flow of traffic across a network. A firewall may be a hardware appliance, or it may be a piece of software that runs on a third-party operating

A firewall is a security device that controls the flow of traffic across a network. A firewall may be a hardware appliance, or it may be a piece of software that runs on a third-party operating system. Firewalls operate based on a set of pre-defined, as well as customizable security rules that inspect network traffic to block or permit access to a network.

Oftentimes, a firewall is logically positioned between a private and a public network, acting as both the first and last line of defense in a network. In a large enterprise, it is common to see separate firewalls within the network architecture, each serving different functions depending on the security level of a particular department. Firewalls are typically used to protect against malware and network-based threats. Modern firewalls can also monitor and alert for suspicious network activities, administer access controls, and protect databases and applications.

Organizations must diligently identify and choose the appropriate firewall type that aligns with their network requirements. Organizations may need more than one type of firewall to better secure their systems.

Configuring your firewall securely and optimally is paramount to ensure its effective and efficient operation and to avoid threat actors gaining control over protected internal networks and resources. Cisco recommends following these six simple steps to safely and securely configure your firewall, ensuring network protection.

Firewalls play a critical role in safeguarding networks from potential threats. Understanding types, proper configuration, and best practices will ensure robust cybersecurity. With a comprehensive and well-maintained firewall strategy, businesses can mitigate risks, safeguard sensitive data, and cultivate a resilient defense against ever-evolving cyber threats.

Editor’s Note: The opinions expressed in this guest author article are solely those of the contributor, and do not necessarily reflect those of Tripwire.