The hidden cost of bad firewall hygiene

Originally posted on LinkedIn — Leader Series · 2026-05-28

The hidden cost of bad firewall hygiene.

Most leaders track tool spend. Few track what poor configuration is actually costing them.

Here’s what bad firewall hygiene looks like — and the real bill:

💰 Slow troubleshooting
Engineers spend 4 hours guessing instead of 20 minutes investigating. Multiply by every incident.

💰 Audit findings
Over-permissive rules trigger compliance gaps. Remediation projects cost 5-10x what prevention would.

💰 Engineer turnover
The best engineers leave teams where they spend their day fighting fires instead of building.

💰 Shadow workarounds
When the firewall team is too slow, business units route around them. Now you have rogue tunnels.

💰 Breach blast radius
A broad “allow” rule turns a small incident into a full network compromise.

The pattern is always the same:
→ Cheap to prevent
→ Expensive to clean up
→ Devastating to ignore

You don’t fix this with a new tool. You fix it with three habits:

1️⃣ Quarterly rule reviews (mandatory, not optional)
2️⃣ A change process that requires documented business justification
3️⃣ Metrics that surface drift before it becomes risk

Firewall hygiene is the cheapest security investment you’ll ever make.

When did your firewall last get a real audit — not just a checkbox one?