API Gateway Deployment Patterns by Phil Wilkins


When it comes to deployment of API Gateways, there are a couple of well-known patterns, that of the Internal Gateway and External Gateway (described in several resources including here).

These two deployments essentially reflect the considerations of offering endpoints up to less secure network segments such as the internet (external gateways) and trusted network zones (internal gateways). But in addition to the physical deployment within a network, these deployments are likely to host APIs with different characteristics, reflecting levels of trust, and emphasis on enterprise decoupling/abstraction (internal) –  the reason why APIs are sometimes associated with the idea of SOA 2.0. Compared with security sensitivity, and potentially monetization or at least usage metrics to help protect specific attack vectors.

These deployment patterns can be seen in the following diagram. Read the complete article here.

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