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src/content/docs/reference-architecture/design-guides/streamlined-waf-deployment-across-zones-and-applications.mdx

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 ## Introduction
 
-Security perimeters have become less defined compared to the traditional “Castle and Moat” deployment that were popular in the past. Within a fixed perimeter, it was relatively easier to secure multiple applications using a single Web Application Firewall (WAF) deployment inside a datacenter. Today this approach does not provide enough flexibility, as applications and services expand beyond the traditional datacenter. There are several good reasons to configure networks and services in a hybrid approach, as well as adopting SaaS platforms, so it is valuable to update the WAF approach to cover this scenario.
+Security perimeters have become less defined compared to the traditional "Castle and Moat" deployment that were popular in the past. Within a fixed perimeter, it was relatively easier to secure multiple applications using a single Web Application Firewall (WAF) deployment inside a datacenter. Today this approach does not provide enough flexibility, as applications and services expand beyond the traditional datacenter. There are several good reasons to configure networks and services in a hybrid approach, as well as adopting SaaS platforms, so it is valuable to update the WAF approach to cover this scenario.
 
 In this sense, Cloud-based WAF solutions can control the perimeter sprawl, with a flexible deployment model that covers applications and services deployed on-premises, on cloud based IaaS and PaaS environments, and also in hybrid environments.