VoIP Security Assessment Services by Professionals

While encryption is crucial, it’s only one layer of protection. Many organizations implement TLS for signaling but forget about media encryption (SRTP), leaving actual voice conversations vulnerable to eavesdropping.

Additionally, encryption doesn’t protect against authentication bypasses, toll fraud, or denial of service attacks targeting your VoIP infrastructure. In fact, improperly configured encryption can actually introduce new denial of service (DoS) vulnerabilities, as TLS traffic requires significant server resources that attackers can exploit.

Without proper rate limiting and resource allocation, encryption mechanisms themselves can become attack vectors that bring down your entire VoIP system.

Your VoIP provider may secure their infrastructure, but the security of your internal VoIP system remains your responsibility.

The demarcation point between provider security and customer security is often misunderstood, leading to security gaps. A comprehensive VoIP security assessment identifies these gaps and clarifies security responsibilities.

Many VoIP attacks go undetected for months. Toll fraud often appears as legitimate international calls, and eavesdropping leaves no obvious traces.

Without specialized monitoring and regular security assessments, organizations typically discover breaches only after significant damage has occurred.

While IT security teams excel at general network security, VoIP systems use specialized protocols (SIP, RTP) with unique vulnerabilities that require specific expertise.

SIP alone has numerous security edge cases that aren’t covered in standard security training. A specialized VoIP security assessment is essential to identify these protocol-specific vulnerabilities.

While toll fraud is a common concern, VoIP security encompasses much more. Other critical risks include corporate espionage through call interception, denial of service attacks disrupting business operations, data theft through voicemail systems, and using compromised VoIP systems as entry points to the broader network.

Understanding these realities helps organizations properly assess their risk and implement appropriate security measures to protect their voice communications infrastructure.

A comprehensive VoIP security assessment typically takes between one week and one month to complete, depending on the complexity and scale of your voice network infrastructure. Several factors influence the timeframe:

Small environments: For organizations with straightforward VoIP deployments (single SIP server, and standard configurations), we can usually complete a thorough assessment within 5-7 business days.

Medium-sized deployments: Companies with more complex VoIP systems that include session border controllers, multiple voice call routing servers, and diverse security measures typically require 2-3 weeks for a complete security assessment.

Enterprise environments: Large organizations with distributed VoIP infrastructure, multiple voice network segments, custom SIP implementations, or international deployments may require the full month to properly assess all potential security vulnerabilities.

The VoIP security assessment timeline often includes initial scoping, penetration testing of VoIP components, analysis of security configurations, vulnerability assessment of your phone system, and development of a comprehensive report with actionable recommendations to protect your voice communications. We work closely with your team to establish a realistic schedule that minimizes disruption to your communications while ensuring thorough coverage of all critical security aspects.

Proper preparation ensures we can conduct a thorough VoIP security assessment efficiently while minimizing disruption to your operations. Here’s how to get ready:

Documentation to Gather

• Network diagrams showing your VoIP infrastructure, including how voice network components communicate with each other
• Inventory list of all VoIP system components (VoIP phones, Session Border Controllers, SIP routers, Media Gateways)
• Configuration details for your VoIP system and SIP and RTP settings
• Security policies related to your voice communications and VoIP provider relationships
• Previous assessment reports if you’ve conducted security testing in the past

Team Preparation

• Designate a primary contact who can coordinate between our security team and your internal stakeholders
• Ensure availability of technical staff familiar with your VoIP environment during key testing phases
• Brief your security team about the upcoming VoIP security assessment to avoid confusion with real VoIP security threats
• Inform network administrators who monitor network traffic so they’re aware of our security assessment activities

Technical Preparations

• Provide test accounts with appropriate access levels to VoIP services
• Provide configuration and source code in scope for the VoIP security assessment
• Schedule maintenance windows if needed for more intensive security testing
• Review firewall rules that might block legitimate testing traffic
• Document known issues or security vulnerabilities you’re already aware of

By preparing these elements in advance, you’ll help us conduct a more comprehensive assessment that identifies genuine security risks while avoiding false positives. Our goal is to work collaboratively with your team to strengthen your VoIP security posture with minimal disruption to your business communications.

We design our testing methodology to minimize disruption to production services. Most tests are performed during off-hours or against staging environments when possible.

For tests that could potentially impact service (such as certain types of load testing), we coordinate closely with your team to schedule appropriate maintenance windows and ensure proper monitoring is in place.

You’ll receive two key documents:

1. A comprehensive technical report detailing all findings, including vulnerability descriptions, impact assessments, proof-of-concept details, and specific remediation recommendations.

2. An executive summary that provides a high-level overview of the assessment, key findings, risk ratings, and strategic recommendations for improving your VoIP security posture.

We also offer an optional post-assessment briefing to walk through the findings and answer any questions.

After your VoIP security assessment, we provide comprehensive support to help you address identified vulnerabilities.

Retest Phase

• Generous retest window allowing you time to implement defense mechanisms across your VoIP infrastructure
• Verification testing to confirm that vulnerabilities in your VoIP system have been properly remediated
• Updated assessment reports documenting how effectively you’ve mitigated VoIP security threats to your voice network

Implementation Guidance

• Technical consultation on securing Session Initiation Protocol (SIP) implementations and IP phones
• Prioritization assistance to address critical vulnerabilities that could lead to toll fraud or security breaches
• Configuration reviews of voice network traffic controls and VoIP controller settings
• Guidance on protecting sensitive data transmitted during voice calls from malicious users

Ongoing Support

• Expert advice on emerging threats and how they might impact your VoIP environment
• Assistance with complex remediation for issues like denial of service (DoS) vulnerabilities or caller ID spoofing
• Consultation on VoIP provider security requirements and configurations

Additional Services

• Follow-up penetration testing to verify the effectiveness of newly implemented safeguard measures
• Vulnerability assessment updates as your VoIP solution evolves
• Periodic security reviews to ensure cyber attacks do not lead to access to your voice network traffic

Our support ensures you receive maximum value from your VoIP security assessment by effectively addressing security risks throughout your voice over IP (VoIP) environment. We believe the initial assessment is just the beginning of improving your security posture, and our team remains available to help you continuously strengthen protection against evolving security challenges in your VoIP environments.

We treat all client information with the utmost confidentiality. Our assessment methodology includes strict data handling procedures to ensure sensitive information (such as call recordings, credentials, or user data) is properly protected.

All findings are securely communicated, and we can work within your specific security requirements, including encrypted communications and secure file transfers.