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What is another word for firewall?

Need synonyms for firewall? Here's a list of similar words from our thesaurus that you can use instead.

Noun
A fireproof barrier used to prevent the spread of fire between or through buildings
“The firewall serves as a fire containment wall between one oil-filled transformer and other neighboring transformers, building structures, and site equipment.”
Noun
Software that allows or blocks such network traffic depending on its perceived threat
“Intruders often breach firewalls, especially by using Trojan horses, which have characteristics that let them get past the firewall.”
Noun
Security against electronic attacks, such as cyberwarfare or cyberterrorism
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