A firewall acts as a barrier between a secured internal network and an outside network.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that a firewall acts as a barrier between a secured internal network and an outside network?

Yes. Multiple authoritative sources confirm that a firewall functions as a security barrier between a secure internal network and external or unsecured networks like the Internet.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked 3 Oct 2026

How claims like this are judged

Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 5

PLOS (all journals): Cryptanalysis and improvement of an elliptic curve based signcryption scheme for firewalls

States explicitly that a firewall sets up a barrier between internal and outside unsecured networks.

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PLOS (all journals): Cryptanalysis and improvement of an elliptic curve based signcryption scheme for firewalls. (n.d.). PLOS (all journals). https://doi.org/10.1371/journal.pone.0208857

2 recorded entries grouped as this source

Additional records of the same source are shown below. They are not counted as additional sources.

Semantic Scholar peS2o: Cryptanalysis and improvement of an elliptic curve based signcryption scheme for firewalls

Identical to item 0, stating a firewall sets up a barrier between an internal network and an outside network.

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Semantic Scholar peS2o: Cryptanalysis and improvement of an elliptic curve based signcryption scheme for firewalls. (n.d.). Semantic Scholar peS2o. https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0208857&type=printable

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More for · 4

arXiv: arXiv: Implementation of Portion Approach in Distributed Firewall Application for Network Security Framework

Describes firewalls acting as layers of defense protecting internal network entities from outsiders.

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arXiv: arXiv: Implementation of Portion Approach in Distributed Firewall Application for Network Security Framework. (n.d.). arXiv. https://arxiv.org/abs/1201.4555

GovInfo: FR 2004 07 30

Requires a firewall between workstations and outside systems like the Internet.

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GovInfo: FR 2004 07 30. (n.d.). GovInfo. https://www.govinfo.gov/app/details/FR-2004-07-30

LibreTexts: LibreTexts: 5.10: Summary

Notes that firewalls keep external adversaries away from vulnerable internal computers.

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LibreTexts: LibreTexts: 5.10%3A Summary. (n.d.). LibreTexts. https://eng.libretexts.org/Bookshelves/Computer_Science/Programming_and_Computation_Fundamentals/Principles_of_Computer_System_Design_(Saltzer_and_Kaashoek)/05%3A_Information_Security/5.10%3A_Summary

Wikibooks: Wikibooks: Information Technology and Ethics/Why compliance management?

States firewalls serve as barriers between secure internal networks and potentially unsafe external networks.

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Wikibooks: Wikibooks: Information Technology and Ethics/Why compliance management?. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/Information_Technology_and_Ethics/Why_compliance_management?

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