I want to connect a mobile device that opens a TCP connection to one of my kubernetes services. The problem is that the connection is killed before the heartbeat interval of 10 minutes.

Below is my deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: device-gateway
  labels:
    app: device-gateway
spec:
  replicas: 1
  strategy:
    rollingUpdate:
      maxUnavailable: 0
  selector:
    matchLabels:
      app: device-gateway
  template:
    metadata:
      labels:
        app: device-gateway
    spec:
      containers:
      - name: device-gateway
        image: [IMAGE]
        imagePullPolicy: Always
      imagePullSecrets:
      - name: myregistrykey
---
apiVersion: v1
kind: Service
metadata:
  name: device-gateway
spec:
  type: ClusterIP
  ports:
  - name: my-device-port
    port: 8485
    protocol: TCP
  selector:
    app: device-gateway

I have tried setting the following annotations in my Ingress

nginx.ingress.kubernetes.io/proxy-socket-keepalive: "on"
nginx.ingress.kubernetes.io/proxy-send-timeout: "1800s"
nginx.ingress.kubernetes.io/proxy-stream-timeout: "1800s"
nginx.org/proxy-send-timeout: "1800s"

service.beta.kubernetes.io/azure-load-balancer-tcp-idle-timeout: "30"

Also, the "idle timeout" in the public IP is set to 30 minutes. Same goes for the LoadBalancer rule.

I installed the ingress controller like this:

helm install nginx-ingress ingress-nginx/ingress-nginx \
    --set tcp.8485="default/device-gateway:8485" \
    --set [more irrelevant settings here]

I'm guessing it has something to do with configuration, so how do I get the timeout to be 30 minutes?