VoIP Security Assessment Services

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With our Cyber Security Consultant

What is Voice Over Internet Protocol or (VoIP) technology?

It is ideal for business use as it replaces landlines and reduces overall communication costs.

Voice Over Internet Protocol or (VoIP) technology allows users to make phone calls over the internet. It is ideal for business use as it replaces landlines and reduces overall communication costs. It also allows for integration with online IT systems and external based-internet services, including video and teleconferencing.

All these advantages make VoIP a great option, but it also comes with VoIP security challenges. Because VoIP systems are internet-based, there is a risk of cyberattacks and malicious breaches. Companies must ensure that their cloud-based phone system is secure and resilient to VoIP security threats.

Voice Over IP (VoIP) security assessment is the manual checking of your VoIP or cloud-based telephony systems. Mindfire offers extensive VoIP security assessment services to ensure that your systems are not vulnerable to attacks. Many organisations cannot fully monitor all the potential VoIP security threats, placing sensitive devices and networks at risk. Mindfire can comprehensively address and evaluate all VoIP infrastructure and identify all security loopholes in your organisation’s voice and text network.

Types of Attacks

VoIP present a unique set of security threats compared to other older types of breaches. Voice over IP threats include:

voip security assessment services

Caller ID spoofing

Caller ID spoofing is a situation where a hacker forges caller IDs from your VoIP network and attempts to impersonate a trusted person in the business, such as managers. They aim to convince receivers to divulge sensitive company information such as passwords. Once the scammer has obtained this information, your whole organisation is at serious risk of a cybersecurity breach.

Denial of Service (DOS) attacks

A DoS attack aims to overload your VoIP network and disrupt the normal functioning of VoIP telephony services. One way this is achieved is through call flooding. Cybercriminals will send numerous calls your way that, when answered, cause the phone lines to ring almost immediately. Such actions can severely disrupt your business and cause chaos across the organisational supply chain.

War dialling

This is a hacking activity where a computer system is used to dial numerous phone numbers to find devices that display a weak or poorly secured access point. If you have such vulnerabilities, the hacker will attempt to enter your network.


When there is unencrypted Session Initiation Protocol (SIP) traffic, a hacker can intercept the VoIP calls - including video calls. Someone who manages to intercept your VoIP phone system can collect phone numbers, passwords and account names.


This type of fraud uses radio frequencies to infiltrate your VoIP system. They connect their external phone line to your network and can change your account details, make long-distance calls, and add and remove account credits. Phreaking increases your VoIP costs and gives hackers access to your voicemail and billing services.


Spamming over Internet Telephony is the phone version of spamming. Hackers of the IP address associated with your VoIP account will be able to send their own voicemail messages to thousands of voicemails. It results in an overloaded voicemail management system and carries the risk of viruses and spyware attached to voicemails.

Toll fraud

Attackers who implement this breach get access to your phone system and make expensive international numbers. They usually call premium phone numbers to receive a portion of the money charged from these calls —leaving you with a high phone bill.

Why Mindfire

Our VoIP security assessment experts will consult with your internal team

Mindfire VoIP vulnerability assessment and penetration testing will monitor the network traffic transferred between handsets and the VoIP controller. We look for weak points that can be used by a malicious user to eavesdrop or inject malicious software.
These questions help us determine the level of security already in place and the potential threats facing your current VoIP phone system.
As we proceed to the actual testing phase, our VoIP security assessment experts will consult with your internal team tasked with managing your VoIP phone services. We need to determine:
  • Your exact VoIP environment
  • What other services your VoIP connects to within your network
  • What extra services your VoIP connects to via the internet

This knowledge will guide us during the testing phase to help rank the vulnerabilities we encounter in terms of risk.

Testing Phase

Mindfire keep you updated on any vulnerabilities or any VoIP malware we detect

Our security assessment professionals will conduct the following tests to check the security of your VoIP system:

  • Inspect the traffic of your SIP network to check the security of the information sent during the initiation and ‘tear-down’ of VoIP phone calls.
  • Analyse the traffic sent over your voice network and confirm the level of VoIP call encryption.
  • Ensure your handset configurations cannot be modified.
  • Test to see if an unauthorised handset can be connected to your VoIP system.
  • Perform a Network Segregation Test to ensure that your VoIP network is isolated from your organisation's and service providers’ LAN.
  • Conduct a vulnerability assessment of all VoIP infrastructure components.

Post-testing reporting

Mindfire aims to ensure you are fully protected from a VoIP cyberattack;

hence we provide extensive reports on our VoIP testing procedures and findings. These include:

Technical report
This detailed report explains all vulnerabilities in detail for action by your IT team. We also provide the recommended course of action to remedy the VoIP breach.

Executive report
This is a summarised version of the technical report that employees at all levels can understand. It is easy to read, clearly explaining the results of our VoIP security assessment. You should distribute it to the whole organisation to help create a culture of vigilance.

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Protect your business

If you are looking for reliable and efficient solutions to enhance your business operations, Mindfire is the perfect partner for you. Contact us today to learn more about our services and how we can help you achieve your goals. Whether you need Cyber Security Services, Managed Security Services (MSS), Consulting Services, Cyber Risk Management Services, Cloud Services, Digital Services, or Digital Transformation, our team of experts is here to assist you every step of the way. Don't hesitate to get in touch with us and take your business to the next level with Mindfire.