agent.org/docs/latest/envoy-introduction/>Open Policy Agent</a>
or <a href=https://github.com/oauth2-proxy/oauth2-proxy><code>oauth2</code> proxy</a>) which may require use of the
<a href=/v1.19/docs/reference/config/networking/envoy-filter/>low-level Envoy configuration APIs</a> in Istio, or may not be possible
at all.</p></li><li><p>Authorization policy lacks necessary semantics for your use case.</p></li></ul><h2 id=solution>Solution</h2><p>In Istio 1.9, we have implemented extensibility into authorizati