Proxy for egress gateway

Is the http_proxy for egress gateway should only be IP, we cannot add a DNS name there instead of IP in address

apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
name: proxy
spec:
hosts:

  • my-company-proxy.com # ignored
    addresses:
  • $PROXY_IP/32
    ports:
  • number: $PROXY_PORT
    name: tcp
    protocol: TCP
    location: MESH_EXTERNA