What is a Firewall?

What is a Firewall?

A firewall is a security device—hardware or software—that monitors and controls incoming and outgoing network traffic based on pre-defined security rules. Firewalls act as a barrier between trusted internal networks and untrusted external networks, such as the internet. Their core purpose is to block unauthorized access while allowing legitimate communication to flow.

How Firewalls Work

• Packet Filtering: Firewalls inspect data packets and allow or deny them based on IP, port, or protocol.
• Stateful Inspection: Tracks active connections and ensures data flows only in expected ways.
• Application Awareness: Next-generation firewalls (NGFWs) can identify and control specific applications like Zoom, Dropbox, or malicious bots.

Types of Firewalls

• Hardware Firewalls: Physical appliances installed at network gateways for perimeter protection.
• Software Firewalls: Programs running on individual devices, like servers or endpoints.
• Cloud Firewalls: Virtual firewalls hosted in cloud environments to protect hybrid or multi-cloud setups.

IronLAN Firewall Solutions

IronLAN provides secure, NDAA-compliant firewall appliances with support for advanced routing, deep packet inspection, and VPN integration. We build firewall systems for edge, core, and branch networks with full policy control and performance optimization.

• Unified Threat Management (UTM): Optional antivirus, intrusion detection, and web filtering built in.
• Zero Trust Ready: Enforce access control policies that assume no device or user is inherently trusted.
• Preconfigured Deployment: Devices arrive staged with your security rules, network layout, and firmware updates.

Build a Secure Perimeter

Whether you're segmenting your LAN, securing a remote office, or protecting your SAN infrastructure, IronLAN firewalls are built to keep threats out and productivity flowing. Ask us how to secure your environment with IronLAN.

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