TCP Middlewares

Controlling connections

Configuration Example

Docker & Swarm

# 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"

Kubernetes IngressRoute

# As a Kubernetes Traefik IngressRoute
---
apiVersion: traefik.io/v1alpha1
kind: MiddlewareTCP
metadata:
  name: foo-ip-allowlist
spec:
  ipAllowList:
    sourcerange:
      - 127.0.0.1/32
      - 192.168.1.7

---
apiVersion: traefik.io/v1alpha1
kind: IngressRouteTCP
metadata:
  name: ingressroute
spec:
# more fields...
  routes:
    # more fields...
    middlewares:
      - name: foo-ip-allowlist

Consul Catalog

# 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@consulcatalog"

File (TOML)

# As TOML Configuration File
[tcp.routers]
  [tcp.routers.router1]
    service = "myService"
    middlewares = ["foo-ip-allowlist"]
    rule = "Host(`example.com`)"

[tcp.middlewares]
  [tcp.middlewares.foo-ip-allowlist.ipAllowList]
    sourceRange = ["127.0.0.1/32", "192.168.1.7"]

[tcp.services]
  [tcp.services.service1]
    [tcp.services.service1.loadBalancer]
    [[tcp.services.service1.loadBalancer.servers]]
      address = "10.0.0.10:4000"
    [[tcp.services.service1.loadBalancer.servers]]
      address = "10.0.0.11:4000"

File (YAML)

# As YAML Configuration File
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"

Available TCP Middlewares

Middleware	Purpose	Area
InFlightConn	Limits the number of simultaneous connections.	Security, Request lifecycle
IPAllowList	Limit the allowed client IPs.	Security, Request lifecycle