Voice over Internet Protocol (VoIP) provides organizations with many advantages, including improved call quality, better scalability and mobility, and lower costs. However, VoIP is also vulnerable to unique threats such as telephony denial-of-service (TDoS) attacks, which can have devastating consequences for any business. By recognizing and understanding TDoS attacks, you can better safeguard your VoIP phone systems against them.
What is TDoS?
TDoS is a specific type of denial-of-service (DoS) attack directed at VoIP systems. Unlike typical DoS attacks aimed at IT systems, TDoS is more specialized and is often used against critical services such as hospital phone lines and emergency services. Considering that these phone lines are crucial to saving people’s lives, TDoS is a pressing concern. And even more disturbing, some TDoS attackers go as far as demanding ransom, akin to the tactics employed in ransomware attacks.
TDoS attacks are characterized by their efficiency, requiring fewer resources than traditional DoS attacks. In its simplest form, a TDoS attack involves an automated phone dialer repeatedly calling a specific number and disconnecting, preventing others from accessing the line. What makes TDoS a challenge to trace and identify is that attackers use cryptocurrencies and caller-ID spoofing, effectively hiding the identity of the attacker.
What should organizations do to prevent TDoS attacks?
Any business that relies on VoIP for communication must take proactive steps to protect its system against TDoS attacks. VoIP security measures work best when implemented long before an attack happens to effectively ensure your organization is protected from any potential TDoS storm, so make sure to include security measures when your VoIP system is first installed.
However, while fortifying your VoIP system with complex security measures may seem like the best solution, it may hinder business operations. Most businesses rely heavily on seamless communication with customers, partners, and third parties, and stringent security measures can impede this essential function. Instead, you should find a good balance between security and usability.
Here are some strategies to achieve this balance:
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