A firewall is a network security control that monitors and filters traffic between networks or hosts based on predefined security policies at various layers of the networking stack. Expanded Explanation 1. Technical Function and Core Characteristics A firewall enforces access control by permitting or blocking network traffic according to configured rule sets that evaluate attributes such as IP addresses, ports, protocols and application contexts. It operates as a Policy Enforcement Point (PEP)

How widely is Firewall used?

877 organizations in our directory are tagged Firewall, referenced across 61 articles and 2 open source projects.

What is Firewall most closely associated with?

Firewall is most closely associated with Cybersecurity and Data Center.

Firewall

Last updated August 24, 2026

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What we add

Graph

A glossary entry defines a term and stops there. It doesn't show where the term is actually being used or written about. We track and link every article that covers it.

BlogPosting NSS Labs reports 2026 Cloud Network Firewall test results on Security Effectiveness BlogPosting Aviz details ASN-DPI SIP and RTP metadata for VoIP BlogPosting Data center, AI compute, and security updates - Week of September 14, 2026 and 9 more on this page

Counted facts

A dictionary definition doesn't say how often a term is actually used. This counts it across the graph -- articles that mention it, open source projects tagged with it, and the organizations tagged with it, listed here alongside the count. A term has no peer companies, and nothing here claims otherwise.

Articles mentioning this entity 61 Open source projects 2 Organizations tagged 877 Organizations 01 Telecom Ltd, 1&1 Telecom GmbH, 1Strike, 2talk, 31173 Services, 6WIND, 7net, ABS (PT Adiwisesa Bisnis Sinergi), ABYS (PT Artha Bina Usaha Sejahtera), Access Cable Television Inc., ACT Fibernet, Adlumin, Adtaq Internet, Advantage Telecom, Advens, Afribone, Agora i9, Agungnet, Air Link Networks, Air Link Rural Broadband Related terms Related terms (co-occurring topics)

The person who sent this agent gets an answer they can act on

Somebody dispatched this agent to evaluate Firewall for a real decision: a shortlist, a vendor comparison, a purchase. "Firewall makes X" isn't something they can act on; they need to know the claim is real and where it came from. Follow one enriched link from Act 2 and see what the agent can actually hand back to them:

The record DefinedTerm Firewall
One of its 12 linked records BlogPosting NSS Labs reports 2026 Cloud Network Firewall test results on Security Effectiveness https://decisioninsights.ai/nss-labs-reports-2026-cloud-network-firewall-test-results-on-security-effectiveness/
The primary source CreativeWork nsslabs.com https://nsslabs.com/media/blog/native-cloud-firewalls-are-convenient-convenience-is-not-security-effectiveness/ Original author: Bob Walder

Our summary is written by Decision Insights Record. The source keeps its own byline, credited above. Both are in the JSON.