icluster installations, the authentication methods allowed in the configuration are now limited to improve the security.</p><p>The two authentication methods output but <code>istioctl create-remote-secret</code> (<code>oidc</code> and <code>token</code>), are not impacted.
As a result, only users that are creating custom kubeconfig files will be impacted.</p><p>A new environment variable, <code>PILOT_INSECURE_MULTICLUSTER_KUBECONFIG_OPTIONS</code>, is added to Istiod to enable the methods that were removed.