 from L7. It only configures the L4-L6 functions (e.g., ports to
expose, TLS configuration) that are uniformly implemented by all good L7
proxies. Users can then use standard Istio rules to control HTTP
requests as well as TCP traffic entering a <code>Gateway</code> by binding a
<code>VirtualService</code> to it.</p><p>For example, the following simple <code>Gateway</code> configures a load balancer
to allow external https traffic for host <code>bookinfo.com</code> into the mesh:</p><pre><code class=languag