Firewall protection and network segmentation

Firewall protection and network segmentation Requirements and security baseline

Baseline alignment. Approved network baselines, boundary tests and documented exceptions. CIS IGs · DISA STIGs · DISA SRGs

• Zone and traffic policies: scope, supported systems and accountable owners
• Supported threat inspection: approved settings, access and dependencies
• Rule logging and validation: acceptance criteria, retention and exceptions

Firewall protection and network segmentation Deployment and control mapping

• Scope and ownership: Controlled traffic between network zones and external services, with approved rules, supported security inspection and tested boundaries.
• Approved rollout and acceptance: Controlled pilot covering zone and traffic policies and supported threat inspection; acceptance test: test approved and prohibited traffic between representative zones, inspect the matching rules and logs and verify any inspection profiles in scope.
• Applicable requirements mapped to configuration, validation evidence and approved exceptions

Firewall protection and network segmentation Client and user guide

• Using zone and traffic policies within the approved service scope
• Recognizing failures and reporting a support request
• User responsibilities, access limits and service acceptance

Firewall protection and network segmentation Technician training outline

• Zone and traffic policies: records, configuration and diagnostic checks
• Supported threat inspection: authorized administration and exception handling
• Rule logging and validation: validation, evidence and service handoff

Firewall protection and network segmentation RDA technician workflow

• Identify and assess the requirement; plan the scope, accountable owner and required approvals
• Implement and verify: Test approved and prohibited traffic between representative zones, inspect the matching rules and logs and verify any inspection profiles in scope.
• Document the configuration and result; hand off operation, review exceptions and plan lifecycle changes

Firewall protection and network segmentation Portal and access training

• Named operators, role boundaries and multifactor access where supported
• Service identities, protected credentials and emergency access
• Access approval, periodic review and removal

Firewall protection and network segmentation Training module template

• Learning objectives and prerequisites: zone and traffic policies: records, configuration and diagnostic checks
• Authorized practical exercise: Test approved and prohibited traffic between representative zones, inspect the matching rules and logs and verify any inspection profiles in scope.
• Knowledge check, observed result and instructor or responsible-owner sign-off

Firewall protection and network segmentation Basic installation and acceptance

• Approved platform, owner, permissions and prerequisite checks
• Controlled pilot covering zone and traffic policies and supported threat inspection
• Acceptance test: Test approved and prohibited traffic between representative zones, inspect the matching rules and logs and verify any inspection profiles in scope.

Firewall protection and network segmentation Advanced deployment and changes

• Extend zone and traffic policies to additional approved scope
• Change supported threat inspection with impact review and rollback
• Validate rule logging and validation after an approved change

Firewall protection and network segmentation Technical configuration and integrations

• Zone and traffic policies: configuration and dependency records
• Supported threat inspection: supported interfaces and permission boundaries
• Rule logging and validation: diagnostic collection, retention and evidence export

Firewall protection and network segmentation Operational audit and checklist

• Coverage and operating checks: zone and traffic policies: coverage, health and unresolved exceptions
• Evidence sample: topology, zone definitions and approved rule configuration; allowed and denied flow tests with exception review
• Review date and owner; pass or fail, exceptions, corrective action and retest evidence

Firewall protection and network segmentation Tabletop exercises

• A required dependency or responsible provider becomes unavailable
• An access or configuration change interrupts the service
• Reported success conflicts with the observed business result

Firewall protection and network segmentation Response playbook

• Assess the affected scope, evidence and business impact
• Authorize corrective action, escalation or rollback
• Verify service recovery, retain evidence and update the baseline

Firewall protection and network segmentation Operational runbooks

• Validate zone and traffic policies against the approved design
• Investigate a failure affecting supported threat inspection
• Collect rule logging and validation evidence and confirm service acceptance

Firewall protection and network segmentation Evaluation and lifecycle review

Selection and fit. Compare viable options against the business need, security requirements, existing systems and full operating cost. Record the reasons for the selection, the tradeoffs accepted and the conditions that would prompt a different choice.

Keeping the choice current. Follow supplier notices between scheduled reviews and reassess before renewal or a material change. Check ownership changes, renamed or retired products, subscription and licensing terms, pricing, capabilities and support commitments. Record the effect on security, data handling, integrations and service continuity. Assign an owner to approve adjustments or plan a transition, including data export and removal of access.

• Measured service outcome and practical acceptance results
• Supported scope, access, evidence availability and dependencies
• Licensing or provider terms, maintenance effort and lifecycle cost