Issue with Istio Authorization Policy at Namespace level

Hi Team,

I am trying to setup the Istio Authorization Policy at Namespace level in my EKS cluster. I have wriiten the Authorization deny Policy for particaular namespace(murali namespace).
Then i am trying to run the curl from a different(default) namespace to the murali namespace application. But even i used deny policy, CURL is working. It is not showing the RBAC access denied.

kind: AuthorizationPolicy
  name: httpbin
  namespace: murali
  action: DENY
  - from:
    - source:
        namespaces: ["default"]

Curl Command:

curl -kv --header ‘Host: muralidhara.com

Is it an issue from istio side or anything i did a mistake from my end? I need someone to help to resolve the issue.

Muralidhara Reddy