/li><li><strong>Added</strong> support for <code>HTTP_PROXY</code> protocol <a href=https://github.com/istio/istio/pull/19919>#19919</a>.</li><li><strong>Improved</strong> <code>iptables</code> setup to use <code>iptables-restore</code> by default <a href=https://github.com/istio/istio/pull/18847>#18847</a>.</li><li><strong>Improved</strong> Gateway performance by filtering unused clusters. This setting is disabled by default <a href=https://github.com/istio/istio/pull/20124>#20124</a>.</li></ul><h2 id=secu