New Routing Reference Documentation

docs/content/reference/routing-configuration/tcp/middlewares/inflightconn.md

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+---
+title: 'Traefik InFlightConn Middleware - TCP'
+description: "Limiting the number of simultaneous connections."
+---
+
+To proactively prevent Services from being overwhelmed with high load, the number of allowed simultaneous connections by IP can be limited with the `inFlightConn` TCP middleware.
+
+## Configuration Examples
+
+```yaml tab="Structured (YAML)"
+# Limiting to 10 simultaneous connections
+tcp:
+  middlewares:
+    test-inflightconn:
+      inFlightConn:
+        amount: 10
+```
+
+```toml tab="Structured (TOML)"
+# Limiting to 10 simultaneous connections
+[tcp.middlewares]
+  [tcp.middlewares.test-inflightconn.inFlightConn]
+    amount = 10
+```
+
+```yaml tab="Labels"
+labels:
+  - "traefik.tcp.middlewares.test-inflightconn.inflightconn.amount=10"
+```
+
+```json tab="Tags"
+// Limiting to 10 simultaneous connections
+{
+  //..
+  "Tags" : [
+    "traefik.tcp.middlewares.test-inflightconn.inflightconn.amount=10"
+  ]
+}
+```
+
+```yaml tab="Kubernetes"
+apiVersion: traefik.io/v1alpha1
+kind: MiddlewareTCP
+metadata:
+  name: test-inflightconn
+spec:
+  inFlightConn:
+    amount: 10
+```
+
+## Configuration Options
+
+| Field | Description | Default | Required |
+|:------|:------------|------------------|-------|
+| `amount` | The `amount` option defines the maximum amount of allowed simultaneous connections. <br /> The middleware closes the connection if there are already `amount` connections opened. | "" | Yes |