diff --git a/release_notes/ocp-4-18-release-notes.adoc b/release_notes/ocp-4-18-release-notes.adoc
index 6a253343e9..13ff4a6df4 100644
--- a/release_notes/ocp-4-18-release-notes.adoc
+++ b/release_notes/ocp-4-18-release-notes.adoc
@@ -485,6 +485,18 @@ To use the dynamic configuration manager, enable the `TechPreviewNoUpgrade` feat
 $ oc patch featuregates cluster -p '{"spec": {"featureSet": "TechPreviewNoUpgrade"}}' --type=merge
 ----
 
+[id="ocp-release-notes-networking-network-matrix-environments_{context}"]
+==== Additional environments for the network flow matrix
+
+With this release, you can view network information for ingress flows to {product-title} services in the following environments:
+
+* {product-title} on bare metal
+* {sno-caps} on bare metal
+* {product-title} on {aws-first}
+* {sno-caps} on {aws-short}
+
+For more information, see  xref:../installing/install_config/configuring-firewall.adoc#network-flow-matrix_configuring-firewall[{product-title} network flow matrix].
+
 [id="ocp-release-notes-nodes_{context}"]
 === Nodes