Clock synchronization

The clocks of information processing systems used by the organization should be synchronized to approved time sources.

Purpose

To ensure accuracy of logs and support forensic investigation and audit.

Implementation Guidance

Configure all systems to use NTP

Synchronize to authoritative time sources

Monitor time synchronization status

Document time source configuration

Ensure time stamps are included in logs

Recommended Tools

AWS CloudTrail

AWS API activity logging service. Essential for compliance and security monitoring.

Wazuh

Open-source SIEM and XDR platform. Best free option for comprehensive security monitoring.

Notion

All-in-one workspace for documentation, policies, and knowledge management. Perfect for startups to manage all ISO 27001 documentation.

ISO 27001 Services from the Directory

These providers can help you implement A.8.17 and achieve ISO 27001 certification.

Advisera

Provider of ISO 27001 documentation, training, and consultancy services to help businesses achieve compliance.

Anecdotes

Enterprise agentic GRC platform with 230+ integrations and 40+ pre-mapped frameworks for Fortune 500 compliance programs.

Arrow Cyber Advisors

Arrow Cyber Advisors enables organizations to build measurable cybersecurity maturity and resilience. We specialize in governance, risk and compliance advisory, providing clear security direction, maturity benchmarking, and execution support tailored to regulated and high-risk environments.

Atoro

Atoro offers specialized ISO 27001 certification services for SaaS companies, simplifying compliance with expert tools.

AuditBoard

Enterprise connected risk platform trusted by over 50% of the Fortune 500 for audit, risk, and compliance management.

Bitsecura

*** Helping Businesses Achieve Compliance & Certification Success *** Bitsecura is a IT governance, risk, and compliance (GRC) firm specialising in helping organisations protect their critical assets, navigate complex regulatory landscapes, and build sustainable cybersecurity frameworks. With over 20 years of industry experience, we offer strategic guidance, bespoke solutions, and operational support that align seamlessly with your business objectives. Our commitment to practical innovation and long-term partnerships ensures that working with Bitsecura not only strengthens your current security posture, but also builds a lasting foundation for future resilience.

View all ISO 27001 services