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How to write an RFP for DNS security

Requirements, questions, and evaluation criteria specific to DNS security procurement

6 min read

DNS security is critical for protecting against a wide range of cyber threats, making a well-defined RFP essential for selecting the right solution. The complexity of DNS infrastructure and the evolving threat landscape necessitate a thorough evaluation process to ensure the chosen vendor meets your organization's specific security needs and operational requirements.

What makes DNS security RFPs different

DNS security RFPs are unique due to the foundational role DNS plays in network operations and security. Unlike other security tools that operate at higher layers, DNS security directly protects the internet's naming system, preventing attackers from redirecting traffic to malicious sites or exfiltrating data.

This requires a deep understanding of DNS protocols, attack vectors like DNS tunneling and cache poisoning, and mitigation techniques such as DNSSEC and threat intelligence integration.nnFurthermore, DNS security solutions must seamlessly integrate with existing network infrastructure, including firewalls, SIEM systems, and identity providers.

The RFP needs to address compatibility, performance, and scalability to ensure the chosen solution can handle the organization's DNS traffic without introducing latency or operational overhead.

Compliance requirements, such as those related to data privacy and industry regulations, also add complexity, requiring vendors to demonstrate adherence to relevant standards and certifications.nnFinally, the shift towards cloud-based DNS security and managed services introduces new considerations around data sovereignty, vendor lock-in, and service level agreements.

The RFP should clearly define expectations for uptime, resolution latency, and support responsiveness to ensure business continuity and minimize the impact of potential security incidents.

  • Integration with existing security infrastructure (SIEM, firewalls, threat intelligence feeds)
  • Support for encrypted DNS protocols (DoH, DoT, DoQ) to protect user privacy
  • Scalability and resilience to handle high DNS query volumes and DDoS attacks
  • Compliance with relevant industry regulations and data privacy laws

RFP vs RFI vs RFQ

Here's when to use each document type when procuring DNS security software.

RFI

Request for Information

Use early in your search to understand what vendors offer and narrow your list. Gather general capabilities, company background, and high-level pricing ranges.

RFP

Request for Proposal

Use when you know your requirements and want detailed vendor solutions and pricing. This is your main evaluation document for shortlisted vendors.

RFQ

Request for Quote

Use when requirements are fixed and you just need final pricing. Often used after RFP when you're ready to negotiate with finalists.

For DNS security, an RFI is useful for initial market exploration and understanding vendor capabilities. An RFP is crucial for a detailed evaluation of technical requirements, security features, and integration options, while an RFQ is less suitable due to the complexity and customization involved in DNS security solutions.

Technical requirements checklist

Use this checklist when defining your RFP scope.

Threat Intelligence

  • Real-time threat intelligence feeds
  • Reputation-based filtering
  • Integration with external threat intelligence platforms
  • Customizable threat intelligence rules

DNS Security Features

  • DNSSEC validation and management
  • DNS firewall capabilities
  • Anti-phishing protection
  • DNS tunneling detection and prevention
  • DDoS mitigation for DNS infrastructure

Reporting and Analytics

  • Real-time monitoring and alerting
  • Detailed DNS traffic analysis
  • Customizable dashboards and reports
  • Integration with SIEM systems

Deployment Options

  • Cloud-based deployment
  • On-premise deployment
  • Hybrid deployment
  • Managed DNS security service

Compliance and Certifications

  • SOC 2 Type II compliance
  • ISO 27001 certification
  • GDPR compliance
  • Industry-specific compliance (e.g., HIPAA, PCI DSS)

Questions to include in your RFP

Architecture and Deployment

  • Describe your solution's architecture, including its scalability and redundancy features.
  • What deployment models do you support (cloud, on-premise, hybrid)?
    Ensures the solution fits your organization's infrastructure strategy.
  • How does your solution integrate with existing DNS infrastructure and management tools?
  • What are the system requirements for on-premise deployment, including hardware and software dependencies?

Threat Detection and Mitigation

  • Describe your solution's threat intelligence capabilities, including the sources of threat data and update frequency.
    Determines the solution's ability to identify and block emerging threats.
  • How does your solution detect and prevent DNS tunneling and data exfiltration attempts?
  • What DDoS mitigation techniques does your solution employ to protect DNS infrastructure?
  • How does your solution handle zero-day threats and newly discovered vulnerabilities?

DNS Security Features

  • What DNSSEC validation and management features are included in your solution?
  • Does your solution support encrypted DNS protocols (DoH, DoT, DoQ)?
    Essential for protecting user privacy and preventing eavesdropping.
  • How does your solution protect against phishing attacks and domain spoofing?
  • What response policy zone (RPZ) capabilities does your solution offer?

Reporting and Analytics

  • What types of reports and dashboards are available for monitoring DNS security events?
  • Can your solution integrate with our existing SIEM system?
    Enables centralized security monitoring and incident response.
  • How does your solution provide visibility into DNS traffic patterns and anomalies?
  • What is the data retention policy for DNS logs and security events?

Integration and Compatibility

  • How does your solution integrate with other security tools, such as firewalls and intrusion detection systems?
  • Does your solution support integration with identity providers (IdPs) for user-based policies?
  • What APIs are available for automating DNS security tasks and data exchange?
  • Describe your solution's ability to integrate with cloud platforms (e.g., AWS, Azure, GCP).

Service Level Agreement (SLA)

  • What uptime and resolution latency guarantees are included in your SLA?
    Ensures business continuity and minimal impact on user experience.
  • What are the escalation procedures for security incidents and service disruptions?
  • How do you measure and report on SLA performance?
  • What compensation is provided if SLA targets are not met?

Pricing and Licensing

  • Describe your pricing model, including all associated costs (e.g., licensing, implementation, support).
    Provides a clear understanding of the total cost of ownership.
  • Are there any usage-based fees or overage charges?
    Helps avoid unexpected costs during peak traffic or DDoS attacks.
  • What licensing options are available (e.g., perpetual, subscription)?
    Ensures the licensing model aligns with your organization's budgeting and procurement processes.
  • What are the payment terms and cancellation policies?

Compliance and security requirements

Depending on your industry, you may need to require proof of these certifications and standards.

SOC 2 Type II

Required for organizations requiring assurance of vendor security controls. If applicable, request a copy of the vendor's SOC 2 Type II report

ISO 27001

Required for organizations requiring an internationally recognized security standard. If applicable, request a copy of the vendor's ISO 27001 certification

GDPR

Required for organizations handling personal data of eu citizens. If applicable, request documentation on the vendor's GDPR compliance measures

HIPAA

Required for healthcare organizations handling protected health information (phi). If applicable, request a Business Associate Agreement (BAA) and HIPAA compliance documentation

PCI DSS

Required for organizations handling payment card data. If applicable, request a copy of the vendor's PCI DSS Attestation of Compliance (AOC)

Evaluation criteria

Here is the suggested weighting for DNS security RFPs.

Threat Detection Effectiveness Ability to accurately identify and block malicious DNS traffic
25%
Integration Capabilities Seamless integration with existing security infrastructure and management tools
20%
Scalability and Performance Ability to handle high DNS query volumes and maintain low latency
15%
Reporting and Analytics Comprehensive reporting and analytics capabilities for monitoring DNS security events
15%
Total Cost of Ownership Implementation, licensing, and ongoing costs
15%
Vendor Reputation and Experience Vendor's track record, customer references, and industry expertise
10%

Some weights were adjusted based on your priorities.

  • Increase if complex integration landscape exists

Red flags to watch

  • Lack of transparency in pricing

    Vendors who are unwilling to provide detailed pricing information may have hidden costs or complex fee structures.

  • Limited threat intelligence sources

    Solutions relying on a small number of threat intelligence feeds may miss emerging threats.

  • Poor integration with existing security tools

    Inadequate integration can create security silos and hinder incident response.

  • Inadequate DDoS mitigation capabilities

    Solutions that cannot effectively mitigate DDoS attacks may leave DNS infrastructure vulnerable to disruption.

  • Vague SLA terms

    Lack of clear guarantees on uptime and resolution latency indicates potential reliability issues.

Key metrics to request

Ask vendors to provide benchmarks from similar customers.

Mean Time To Detect (MTTD) DNS threats

Indicates how quickly the solution can identify and alert on malicious activity.

Mean Time To Remediate (MTTR) DNS incidents

Measures how efficiently the solution can contain and resolve security incidents.

DNS resolution latency

Ensures security measures do not negatively impact user experience.

DDoS mitigation capacity

Verifies the solution's ability to withstand large-scale DDoS attacks.

False positive rate

Minimizes alert fatigue and ensures security teams can focus on legitimate threats.