--- title: "Traefik Proxy Middleware Overview" description: "There are several available middleware in Traefik Proxy used to modify requests or headers, take charge of redirections, add authentication, and so on." --- # Middlewares Tweaking the Request {: .subtitle } ![Overview](../assets/img/middleware/overview.png) Attached to the routers, pieces of middleware are a means of tweaking the requests before they are sent to your [service](../routing/services/index.md) (or before the answer from the services are sent to the clients). There are several available middleware in Traefik, some can modify the request, the headers, some are in charge of redirections, some add authentication, and so on. Middlewares that use the same protocol can be combined into chains to fit every scenario. !!! warning "Provider Namespace" Be aware of the concept of Providers Namespace described in the [Configuration Discovery](../providers/overview.md#provider-namespace) section. It also applies to Middlewares. ## Configuration Example ```yaml tab="Docker" # As a Docker Label whoami: # A container that exposes an API to show its IP address image: traefik/whoami labels: # Create a middleware named `foo-add-prefix` - "traefik.http.middlewares.foo-add-prefix.addprefix.prefix=/foo" # Apply the middleware named `foo-add-prefix` to the router named `router1` - "traefik.http.routers.router1.middlewares=foo-add-prefix@docker" ``` ```yaml tab="Kubernetes IngressRoute" --- apiVersion: traefik.containo.us/v1alpha1 kind: Middleware metadata: name: stripprefix spec: stripPrefix: prefixes: - /stripit --- apiVersion: traefik.containo.us/v1alpha1 kind: IngressRoute metadata: name: ingressroute spec: # more fields... routes: # more fields... middlewares: - name: stripprefix ``` ```yaml tab="Consul Catalog" # Create a middleware named `foo-add-prefix` - "traefik.http.middlewares.foo-add-prefix.addprefix.prefix=/foo" # Apply the middleware named `foo-add-prefix` to the router named `router1` - "traefik.http.routers.router1.middlewares=foo-add-prefix@consulcatalog" ``` ```json tab="Marathon" "labels": { "traefik.http.middlewares.foo-add-prefix.addprefix.prefix": "/foo", "traefik.http.routers.router1.middlewares": "foo-add-prefix@marathon" } ``` ```yaml tab="Rancher" # As a Rancher Label labels: # Create a middleware named `foo-add-prefix` - "traefik.http.middlewares.foo-add-prefix.addprefix.prefix=/foo" # Apply the middleware named `foo-add-prefix` to the router named `router1` - "traefik.http.routers.router1.middlewares=foo-add-prefix@rancher" ``` ```yaml tab="File (YAML)" # As YAML Configuration File http: routers: router1: service: myService middlewares: - "foo-add-prefix" rule: "Host(`example.com`)" middlewares: foo-add-prefix: addPrefix: prefix: "/foo" services: service1: loadBalancer: servers: - url: "http://127.0.0.1:80" ``` ```toml tab="File (TOML)" # As TOML Configuration File [http.routers] [http.routers.router1] service = "myService" middlewares = ["foo-add-prefix"] rule = "Host(`example.com`)" [http.middlewares] [http.middlewares.foo-add-prefix.addPrefix] prefix = "/foo" [http.services] [http.services.service1] [http.services.service1.loadBalancer] [[http.services.service1.loadBalancer.servers]] url = "http://127.0.0.1:80" ``` ## Available Middlewares A list of HTTP middlewares can be found [here](http/overview.md). A list of TCP middlewares can be found [here](tcp/overview.md).