5/pt-br/blog/2019/egress-performance/case2_sidecar_passthru3.png alt="Sidecar intercepting traffic to external MongoDB"></a></div><figcaption>Sidecar intercepting traffic to external MongoDB</figcaption></figure><h3 id=case-3-egress-gateway>Case 3: Egress gateway</h3><p>The egress gateway and corresponding destination rule and virtual service resources are defined for accessing MongoDB. All traffic to and from the external DB goes through the egress gateway (envoy).</p><figure style=width:70%><div class=wra