"The Ratings service error messages"><img class=element-to-stretch src=/v1.15/blog/2018/egress-mongo/errorFetchingBookRating.png alt="The Ratings service error messages"></a></div><figcaption>The Ratings service error messages</figcaption></figure><p>In the following sections you will configure egress access to the external MongoDB service, using different options for
egress control in Istio.</p><h2 id=egress-control-for-tcp>Egress control for TCP</h2><p>Since <a href=https://docs.mongodb.com/manual/referen