diff --git a/cfg/rippled-example.cfg b/cfg/rippled-example.cfg
index beaead95f..55073a9e2 100644
--- a/cfg/rippled-example.cfg
+++ b/cfg/rippled-example.cfg
@@ -939,6 +939,19 @@
 #   connection info is specified under the [ledger_tx_tables] config section;
 #   see the Database section for further documentation.
 #
+#   Each ETL source specified must have gRPC enabled (by adding a [port_grpc]
+#   section to the config). It is recommended to add a secure_gateway entry to
+#   the gRPC section, in order to bypass the server's rate limiting.
+#   This section needs to be added to the config of the ETL source, not
+#   the config of the reporting node. In the example below, the
+#   reporting server is running at 127.0.0.1. Multiple IPs can be
+#   specified in secure_gateway via a comma separated list.
+#
+#   [port_grpc]
+#   ip = 0.0.0.0
+#   port = 50051
+#   secure_gateway = 127.0.0.1
+#
 #
 #-------------------------------------------------------------------------------
 #
@@ -1567,6 +1580,7 @@ protocol = ws
 #[port_grpc]
 #port = 50051
 #ip = 0.0.0.0
+#secure_gateway = 127.0.0.1
 
 #[port_ws_public]
 #port = 6005
@@ -1670,4 +1684,3 @@ validators.txt
 # source_grpc_port=50051
 # source_ws_port=6005
 # source_ip=127.0.0.1
-