TDoS: an attack on VoIP systems

By | October 26, 2016

TDoS: an attack on VoIP systems

TDoS: an attack on VoIP systems

Cyber-crimes based on denial of services (DoS) attacks are nothing new. But of the businesses facing the threat of a DoS to their Voice over Internet Protocol (VoIP) system, most have no idea how to prevent this type of attack, or even why it’s being launched against them. If you’re one of those businesses, we have everything you need to know right here.

Denial of service attacks

The end goal of any DoS attack is to overwhelm a system with so many requests that the system is eventually forced to shut down. Telephony DoS (TDoS) attacks are a subcategory wherein these types of attacks are leveled at VoIP systems. Sadly, this security bulletin has jumped to the front of security concerns as a result of its use against hospitals and 9-1-1 phone lines.

In another depressing development, some TDoS attackers demand a ransom to halt the attack. Much like ransomware, with the help of cryptocurrencies and caller-ID spoofing, it’s incredibly difficult to identify attackers.

TDoS attacks generally employ fewer resources than the DoS attacks that are designed to cripple IT systems such as networks, servers, and software. At its most basic, all that a TDoS attack requires is an automated phone dialer that calls a target phone number and hangs up — over and over. That very simple concept can stop anyone else from getting through the line.

What organizations need to do

Counter-intuitive as it might sound, locking down your VoIP system with complicated and unnecessary security measures will ultimately do more harm than good. Most businesses can’t operate if they can’t communicate with their customers.

Although VoIP may be a digital resource similar to your other IT systems, the very nature of phone lines makes it impossible to hide them behind firewalls and other protections. However, there are new solutions that offer protection to VoIP systems. The new security protocols can protect your communication infrastructure against those who try to use force to gain access to your directory information. These protocols can also identify, reroute, and filter calls coming from known attackers.

If you’re experiencing any abnormalities with your VoIP system, or if you want to deploy the most up to date solution that the market has to offer, we have just the company in mind. With years of experience in the field, our expert staff is ready to help you at the drop of a hat — just call today.

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About Al Alper

Al Alper is the founder and President of Absolute Logic, a technology services service firm with deep experience in the insurance, financial services and health care services fields. Absolute Logic was founded in 1991 in response to the dearth of full service technology firms in the SMB space. Early on Al identified the need to target underserved vertical markets such as independent insurance agents and brokers who lacked the resources of a full-time technology staff, and developed expertise in their line-of-business applications and hardware. That differentiator propelled Absolute Logic to a leadership position in the tri-state area, becoming the preferred vendor to several private and public institutions. Today, Absolute Logic offers the full suite of technology solutions that ensure clients have the latest technology that help keep their clients compliant and on the cutting edge. Mr. Alper holds multiple degrees in Finance, Computer Information Systems and Mathematics. He is a member of the Wilton Board of Finance, serves as Chairman of the Wilton Town Committee, has served on the boards of multiple charities and donates his considerable experience to support local non-profits.