New and innovative security tools seem to be emerging all the time, but the frontline defense for just about every network in operation today remains the trusty firewall. They aren’t perfect, but if configured correctly and working as intended, firewalls can do a solid job of blocking threats from entering a network, while restricting unauthorized traffic from leaving.

The problem network administrators face is that as their networks grow, so do the number of firewalls. Large enterprises can find themselves with hundreds or thousands, a mix of old, new and next-gen models, probably from multiple vendors — sometimes accidentally working against each other. For admins trying to configure firewall rules, the task can quickly become unmanageable.

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