From Wikipedia's article on [[WikiPedia:Wardialing]]:
 War dialing or wardialing is a technique of using a modem to automatically scan a list of telephone numbers, usually dialing every number in a local area code to search for computers, Bulletin board systems and fax machines. Hackers use the resulting lists for various purposes, hobbyists for exploration, and crackers - malicious hackers who specialize in computer security - for password guessing.

See also: WarDriving, WarWalking, WarStrollering.

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[CategoryGlossary]