A feature allowing individuals
to dial in and use a firmÂ’s telephone system from a remote location (thus
making it a ripe target for phreaking
exploits) and place telephone calls for free. Though, in theory, access to the
DISA port is protected by a pass code, these pass codes are not difficult for crackers to ascertain. According to
security experts, any business having a telephone system that allows employees
to access it when away from their offices is vulnerable to phreakers. Access to
such telephone systems can be made through the DISA, voice mail, and remote
maintenance ports, even when they are not activated.
See Also:
Crackers; Phreaking.
Lee, M-Y. Prevent Toll Fraud on Your Telephone Lines. [Online, January 14,
2002.] Entrepreneur.com Inc., Website. http://www.entrepreneur.com/article/
0,4621,296289,00.html.