Understanding Network Activity Logging for CMMC
When your business is working toward CMMC (Cybersecurity Maturity Model Certification) compliance, a common question is whether you need to log all network activity. Simply put, CMMC requires organizations handling Department of Defense (DoD) information to maintain detailed records of network events to detect and respond to cybersecurity threats. This means tracking who accessed what, when, and from where on your network, rather than capturing every single bit of data flowing through it.
Why Network Logging Matters for Your Business
Logging network activity is crucial because it helps you spot unusual behavior that could signal a cyberattack or insider threat. Without these logs, you might miss early warning signs, leading to downtime, data breaches, or loss of sensitive government contracts. For a small to mid-sized business, even a short disruption can hurt productivity and damage your reputation with customers and partners. From a compliance standpoint, having proper logs is also essential to pass CMMC audits and maintain eligibility for DoD contracts.
A Practical Example
Imagine a 50-employee manufacturing company subcontracting for the DoD. They recently started implementing CMMC requirements and asked their IT provider about network logging. The provider set up automated logs on their firewall and servers that capture login attempts, file access, and unusual traffic patterns. One day, the logs flagged multiple failed login attempts from an external IP address. Thanks to these logs, the IT team quickly blocked the source and investigated, preventing a potential breach. Without logging, this threat might have gone unnoticed until damage occurred.
Checklist: What You Can Do Now
- Ask your IT provider: Do you have network activity logging enabled on all critical devices like firewalls, routers, and servers?
- Verify log retention: How long are logs stored, and are they protected against tampering?
- Check log review processes: Are logs regularly reviewed or monitored for suspicious activity?
- Confirm scope: Are logs capturing key events such as user logins, file access, and network connections?
- Ensure secure storage: Are logs stored securely, ideally offsite or in a protected environment?
- Review access controls: Who can view or modify logs? Limit this to trusted personnel.
- Test incident response: Does your IT team have a plan to act on alerts generated from log monitoring?
Next Steps
Meeting CMMC requirements for network activity logging is a foundational step in protecting your business and maintaining DoD contracts. If you're unsure about your current logging practices or how to improve them, consider consulting a managed IT provider experienced with CMMC compliance. They can help you set up appropriate logging, monitoring, and incident response processes tailored to your business size and risk profile, ensuring you stay audit-ready without overcomplicating your IT environment.