istio.io/content/en/docs/reference/glossary/gateway.md

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title: Gateway
test: n/a
---
A gateway is a standalone Istio proxy deployed at the edge of the mesh.
Gateways are used to route traffic [into](/docs/tasks/traffic-management/ingress/) or [out of](/docs/tasks/traffic-management/egress/) the mesh.
An Istio `Gateway` CR is used to configure the exposed ports of a gateway deployment.