Gartner Information Technology Research

Control Network Security Complexity, Inefficiencies and Security Failures by Minimizing Firewall Diversity

Published: 27 March 2020

ID: G00466951

Analyst(s): Adam Hils , Rajpreet Kaur


Using firewalls from multiple vendors increases complexity, not security. Security and risk management leaders should limit firewall platform diversity to minimize self-inflicted configuration errors, and save money/resources in other security technologies to secure the network from modern attacks.

Table Of Contents
  • Key Challenges



  • Evaluate Whether the Organization Has Use Cases That Support Multiple Firewalls
    • Use Case No. 1: Traditional Data Center Multibrand “Firewall Sandwich”
    • Use Case No. 2: Deploy Two Brands of Firewall at the Gateway, One Behind the Other
    • Use Case No. 3: East-West Data Center Microsegmentation With Cloud-Native Tool
    • Use Case No. 4: East-West Data Center Microsegmentation With Specialized Overlay
    • Use Case No. 5: Use Different Tools for North-South and East-West — Manage Policies With NSPM
    • Use Case No. 6: Use FWaaS to Protect Remote Branch Office and Mobile Users
  • Decide Which Incumbent Firewall Platform Best Fits Your Organization’s Needs
  • Develop a Strategy to Manage Down to One Firewall, If Your Enterprise Fits the Single Firewall Brand Profile

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