War-dialing meaning

Present participle of war-dial.
verb
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The practice of having a computer dial large numbers of telephone numbers in search of devices that can be exploited, such as fax machines or modems.
noun
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A similar practice in other address spaces, such as IP addresses.
noun
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Origin of war-dialing

  • Reference to the 1983 movie WarGames, which featured the practice.

    From Wiktionary