# TCP Middlewares Overview

TCP Middlewares in Traefik let you manage connections on the fly. You can configure them in multiple ways (Docker labels, TOML, YAML, etc.).

<details id="bkmrk-configuration-example-tcp-docker"><summary>Configuration Example in a `docker-compose.yaml`</summary>

### Configuration Example in a `docker-compose.yaml`

```yaml

# 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-ip-allowlist`
    - "traefik.tcp.middlewares.foo-ip-allowlist.ipallowlist.sourcerange=127.0.0.1/32, 192.168.1.7"
    # Apply the middleware named `foo-ip-allowlist` to the router named `router1`
    - "traefik.tcp.routers.router1.middlewares=foo-ip-allowlist@docker"
  
```

</details><details id="bkmrk-configuration-example-tcp-yaml"><summary>Configuration Example in a `dynamic.yml`</summary>

### Configuration Example in a `dynamic.yml`

```yaml

tcp:
  routers:
    router1:
      service: myService
      middlewares:
        - "foo-ip-allowlist"
      rule: "Host(`example.com`)"

  middlewares:
    foo-ip-allowlist:
      ipAllowList:
        sourceRange:
          - "127.0.0.1/32"
          - "192.168.1.7"

  services:
    service1:
      loadBalancer:
        servers:
          - address: "10.0.0.10:4000"
          - address: "10.0.0.11:4000"
  
```

</details>### Available TCP Middlewares

<table id="bkmrk-tcp-middleware-purpose-a" style="width: 73.2143%; height: 150px;"><thead><tr style="height: 29.7969px;"><th style="width: 21.0163%; height: 29.7969px;">Middleware</th><th style="width: 50.3379%; height: 29.7969px;">Purpose</th><th style="width: 28.4553%; height: 29.7969px;">Area</th></tr></thead><tbody><tr style="height: 29.7969px;"><td style="width: 21.0163%; height: 29.7969px;">[InFlightConn](https://doc.traefik.io/traefik/middlewares/tcp/inflightconn/)</td><td style="width: 50.3379%; height: 29.7969px;">Limits the number of simultaneous connections.</td><td style="width: 28.4553%; height: 29.7969px;">Security, Request lifecycle</td></tr><tr style="height: 29.7969px;"><td style="width: 21.0163%; height: 29.7969px;">[IPAllowList](https://doc.traefik.io/traefik/middlewares/tcp/ipallowlist/)</td><td style="width: 50.3379%; height: 29.7969px;">Limit the allowed client IPs.</td><td style="width: 28.4553%; height: 29.7969px;">Security, Request lifecycle</td></tr></tbody></table>