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The Styra DAS Emissary-ingress system type helps you manage the client API requests permitted within your OPA-integrated Emissary-ingress Gateway. For example, permit API requests only to predefined backend APIs to minimize the risk of data exfiltration or implement microservice API authorization.

Figure 1 - OPA-integrated Emissary-ingress ArchitectureFigure 1 - OPA-integrated Emissary-ingress Architecture

For more information on how OPA can be integrated with Emissary-ingress for API authorization and enforce security policies over client API requests received by Emissary-ingress, see the Emissary-ingress tutorial.