Situation
Years of changes had left a rule base that nobody could fully explain, on a platform that was reaching end of support. Critical infrastructure rules out long outages.
Approach
Analysed which rules were actually used, rebuilt the policy around zones and functions, and migrated in staged cut-overs with documented test and rollback steps.
Result
A rule base that can be reviewed and audited, on a supported platform, with documentation the operations team uses.
Next step
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