Microsegmentation Control from Perimeter to Workload with Illumio

The Challenge

This national bank, a FireMon customer since 2017, was managing 47 firewalls across Palo Alto, AWS, Azure, and Meraki while pursuing Large Financial Institution (LFI) certification. As part of its zero trust strategy, the bank began rolling out Illumio to extend microsegmentation deep into its hybrid network. But policy visibility stopped at the perimeter. Without FireMon's visibility layered on top, those 3,600 microsegmentation instances existed outside centralized policy governance. That gap put the bank's LFI certification effort at risk, and closing it meant pairing Illumio's segmentation power with FireMon's policy control across the entire fabric.

The company sought to:

• Extend policy visibility and control from perimetr firewalls into thousands of Illumio microsegmentation instances
• Unify policy management across perimeter and microsegmentation layers in a single platform
• Replace manual rule requests with automated, custom change workflows
• Embed compliance controls and reporting directly into its existing ticketing system
• Protect LFI certification progress with continuous rule auditing

The Solution

Because the bank already trusted FireMon across its 47-firewall estate, FireMon was positioned to close the visibility gap the moment Illumio evaluation began. The FireMon and Illumio integration extended policy visibility and control from perimeter firewalls straight into the bank's 3,600 microsegmentation instances. The result was a single, unified view of policy across Palo Alto, AWS, Azure, Meraki, and Illumio, with custom automated change workflows replacing manual rule requests and compliance reporting embedded directly into existing ticketing tools. The integration gave the bank's zero trust rollout the governance layer it had been missing.

FireMon Delivered

• Unified policy visibility and control across perimeter firewalls and 3,600+ Illumio microsegmentation instances
• A single platform spanning Palo Alto, AWS, Azure, Meraki, and Illumio
• End-to-end automation of change workflows, from request to approval
• Compliance controls and reporting built into existing change management tools
• Continuous rule auditing to reduce risk and support certification milestones

Results

• Extended unified policy visibility and control into 3,600+ Illumio microsegmentation instances
• Unified governance across 47 firewalls and a hybrid, multi-vendor, multi-platform environment
• Reduced manual policy errors that put LFI certification at risk
• Automated compliance reporting and change tickets across existing workflows
• Strengthened the case for expanding Illumio microsegmentation as zero trust maturity grows