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71 lines
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71 lines
4.0 KiB
Plaintext
---
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layout: docs
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page_title: Gateway Types
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description: >-
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Ingress, terminating, and mesh gateways are proxies that direct traffic into, out of, and inside of Consul's service mesh. Learn how these gateways enable different kinds of service-to-service communication.
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---
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# Types of Gateway Connections in a Service Mesh
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~> **Note**: The features shown below are extensions of Consul's service mesh capabilities. If you are not utilizing
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Consul service mesh then these features will not be relevant to your task.
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## Service-to-service traffic between Consul datacenters
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-> **1.6.0+:** This feature is available in Consul versions 1.6.0 and newer.
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Mesh gateways enable routing of service mesh traffic between different Consul datacenters. Those datacenters can reside
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in different clouds or runtime environments where general interconnectivity between all services in all datacenters
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isn't feasible. One scenario where this is useful is when connecting networks with overlapping IP address space.
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These gateways operate by sniffing the SNI header out of the mTLS connection and then routing the connection to the
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appropriate destination based on the server name requested. The data within the mTLS session is not decrypted by
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the Gateway.
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As of Consul 1.8.0, mesh gateways can also forward gossip and RPC traffic between Consul servers.
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This is enabled by [WAN federation via mesh gateways](/docs/connect/gateways/mesh-gateway/wan-federation-via-mesh-gateways).
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For more information about mesh gateways, review the [complete documentation](/docs/connect/gateways/mesh-gateway/service-to-service-traffic-datacenters)
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and the [mesh gateway tutorial](https://learn.hashicorp.com/tutorials/consul/service-mesh-gateways).
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## Traffic from outside the Consul service mesh to services in the mesh
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-> **1.8.0+:** This feature is available in Consul versions 1.8.0 and newer.
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Ingress gateways are an entrypoint for outside traffic. They enable potentially unauthenticated ingress traffic from
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services outside the Consul service mesh to services inside the service mesh.
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These gateways allow you to define what services should be exposed, on what port, and by what hostname. You configure
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an ingress gateway by defining a set of listeners that can map to different sets of backing services.
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Ingress gateways are tightly integrated with Consul's L7 configuration and enable dynamic routing of HTTP requests by
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attributes like the request path.
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For more information about ingress gateways, review the [complete documentation](/docs/connect/gateways/ingress-gateway)
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and the [ingress gateway tutorial](https://learn.hashicorp.com/tutorials/consul/service-mesh-gateways).
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## Traffic from services in the Consul service mesh to external services
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-> **1.8.0+:** This feature is available in Consul versions 1.8.0 and newer.
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Terminating gateways enable connectivity from services in the Consul service mesh to services outside the mesh.
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Services outside the mesh do not have sidecar proxies or are not [integrated natively](/docs/connect/native).
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These may be services running on legacy infrastructure or managed cloud services running on
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infrastructure you do not control.
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Terminating gateways effectively act as egress proxies that can represent one or more services. They terminate Connect
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mTLS connections, enforce Consul intentions, and forward requests to the appropriate destination.
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These gateways also simplify authorization from dynamic service addresses. Consul's intentions determine whether
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connections through the gateway are authorized. Then traditional tools like firewalls or IAM roles can authorize the
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connections from the known gateway nodes to the destination services.
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For more information about terminating gateways, review the [complete documentation](/docs/connect/gateways/terminating-gateway)
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and the [terminating gateway tutorial](https://learn.hashicorp.com/tutorials/consul/teminating-gateways-connect-external-services).
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