to the <a href=/v1.18/blog/2018/egress-mongo/#mutual-tls-between-the-sidecar-proxies-and-the-egress-gateway>Mutual TLS between the sidecar proxies and the egress gateway</a> section.
Otherwise, proceed to the following section.</p></li></ol><h4 id=configure-tcp-traffic-from-sidecars-to-the-egress-gateway>Configure TCP traffic from sidecars to the egress gateway</h4><ol><li><p>Define the <code>EGRESS_GATEWAY_MONGODB_PORT</code> environment variable to hold some port for directing traffic through
the egress g