Cannot allow external traffic through ISTIO - kubernetes

Question

I am trying to setup Istio and I need to whitelist few ports for allowing non mTLS traffic from outside world coming in through specfic port for few pods runnings in local k8s.
I am unable to find a successful way of doing it.
Tried Service entry, policy and destination rule and didnt succeed.
Helps is highly appreciated.
version.BuildInfo{Version:"1.1.2", GitRevision:"2b1331886076df103179e3da5dc9077fed59c989", User:"root", Host:"35adf5bb-5570-11e9-b00d-0a580a2c0205", GolangVersion:"go1.10.4", DockerHub:"docker.io/istio", BuildStatus:"Clean", GitTag:"1.1.1"}```
Service Entry
```apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
name: external-traffic
namespace: cloud-infra
spec:
hosts:
- "*.cluster.local"
ports:
- number: 50506
name: grpc-xxx
protocol: TCP
location: MESH_EXTERNAL
resolution: NONE```

Answer 1

You need to add a DestinationRule and a Policy :
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: destinationrule-test
spec:
host: service-name
trafficPolicy:
tls:
mode: ISTIO_MUTUAL
portLevelSettings:
- port:
number: 8080
tls:
mode: DISABLE
---
apiVersion: authentication.istio.io/v1alpha1
kind: Policy
metadata:
name: policy-test
spec:
targets:
- name: service-name
ports:
- number: 8080
peers:
This has been tested with istio 1.0, but it will probably work for istio 1.1. It is heavily inspired by the documentation https://istio.io/help/ops/setup/app-health-check/

Answer 2

From your question, I understood that you want to control your ingress traffic allow some ports to your services that functioning in your mesh/cluster from outside, but your configuration is for egress traffic.
In order to control and allow ports to your services from outside, you can follow these steps.
1.Make sure that containerPort included to your deployment/pod configuration.
For more info
2.You have to have service pointing to your backends/pods. For more info about Kubernetes Services.
3.Then in your Istio enabled cluster, you have to create Gateway similar to below configuration:
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
name: your-service-gateway
namespace: foo-namespace # Use same namespace with backend service
spec:
selector:
istio: ingressgateway # use Istio default gateway implementation
servers:
- port:
number: 80
name: HTTP
protocol: HTTP
hosts:
- "*"
4.Then configure route to your service for traffic entering via the this gateway by creating VirtualService:
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: your-service
namespace: foo-namespace # Use same namespace with backend service
spec:
hosts:
- "*"
gateways:
- your-service-gateway # define gateway name
http:
- match:
- uri:
prefix: "/"
route:
- destination:
port:
number: 3000 # Backend service port
host: your-service # Backend service name
Hope it helps.