tio authorization to protect your services even without authenticated identities. The example below
shows that you can specify allowed source IP range in your authorization policy.</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: &#34;rbac.istio.io/v1alpha1&#34;
kind: ServiceRoleBinding
metadata:
  name: book-reader
  namespace: default
spec:
  subjects:
  - properties:
      source.ip: 10.20.0.0/9
  roleRef:
    kind: ServiceRole
    name: &#34;book-reader&#34;
</code></p