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How to Identify Vulnerable Modems - And Why You Should

By: SECNAP Network Security Corporation
Published: 9/20/2010

A simple, $20 modem can undermine a million-dollar security program. We’ve seen it happen more than once.

Vulnerable modems are open doors for hackers, who can gain unauthorized access to your network and data through a technique known as war dialing. War dialing typically involves the use of a modem to automatically dial a list of telephone numbers in search of computers, modems and fax machines.

Firewalls offer no protection against war dialing, because the attacker is entering your system through a phone line. And using data link software to transfer data provides no protection against a hacker who is war-dialing.

However, there are effective steps that IT professionals can take to identify and protect modems before they can be exploited. This brief (3-page) paper will get you started.


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