Hacking techniques: War dialing

    Date11 Sep 2002
    CategoryHacks/Cracks
    3399
    Posted ByAnthony Pell
    This article looks at a popular form of attack on an organization's computer network known as war dialing. The term war dialing involves the exploitation of an organization's telephone, dial, and private branch exchange (PBX) systems to penetrate internal network and computing resources. After introducing and exploring the different forms war dialing attacks can take and some tools used to execute such attacks, the article examines measures that can be taken to prevent such an attack.. . . This article looks at a popular form of attack on an organization's computer network known as war dialing. The term war dialing involves the exploitation of an organization's telephone, dial, and private branch exchange (PBX) systems to penetrate internal network and computing resources. After introducing and exploring the different forms war dialing attacks can take and some tools used to execute such attacks, the article examines measures that can be taken to prevent such an attack.

    In today's ubiquitous networking environment, threats come in all shapes and sizes. And security analysts would like to believe that with a firewall in place, you are safe from network and systems exploitation. This just isn't so. In this article, I will look at one particularly popular attack: war dialing. A war dialing attack is malicious in intent and is a form of penetration into an organization's network designed to elude firewalls and intrusion detection systems (IDS). War dialing attacks involve attempts at gaining access to an organization's internal computing and networking resources via dial-in access. In laymen's terms, the attacker dials a number inside an organization's network to connect to systems behind the organization's firewall or perimeter defenses. This article looks at the most common form of network penetration testing used by both hackers and security auditors today. It then examines exactly what needs to be secured to prevent a war-dialing attack and how to implement it. This article also describes two methods organizations can employ to reduce their exposure to this kind of attack.

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