Legacy Firewall Modernization for Multi-Site Operations
Challenge
A distributed environment relied on aging firewall policy with inconsistent NAT rules and limited change traceability.
Approach
Conducted rulebase analysis, grouped redundant policies, planned phased ASA-to-FTD migration, and validated traffic flows at each checkpoint.
Outcome
Reduced policy complexity, improved auditability, and completed migration with controlled cutover windows.
Tools
- Cisco ASA
- Cisco Secure Firewall FTD
- FMC
- Change Runbooks
Sanitized and representative example.