diff --git a/rmw_connext_cpp/src/rmw_node.cpp b/rmw_connext_cpp/src/rmw_node.cpp
index 8b4d16da..ad57f633 100644
--- a/rmw_connext_cpp/src/rmw_node.cpp
+++ b/rmw_connext_cpp/src/rmw_node.cpp
@@ -28,10 +28,12 @@ rmw_create_node(
   const char * name,
   const char * namespace_,
   size_t domain_id,
-  const rmw_node_security_options_t * security_options)
+  const rmw_node_security_options_t * security_options,
+  bool localhost_only)
 {
   return create_node(
-    rti_connext_identifier, context, name, namespace_, domain_id, security_options);
+    rti_connext_identifier, context, name, namespace_, domain_id, security_options,
+    localhost_only);
 }
 
 rmw_ret_t
diff --git a/rmw_connext_dynamic_cpp/src/functions.cpp b/rmw_connext_dynamic_cpp/src/functions.cpp
index 1a7f3664..82f5d99b 100644
--- a/rmw_connext_dynamic_cpp/src/functions.cpp
+++ b/rmw_connext_dynamic_cpp/src/functions.cpp
@@ -298,10 +298,12 @@ rmw_create_node(
   const char * name,
   const char * namespace_,
   size_t domain_id,
-  const rmw_node_security_options_t * security_options)
+  const rmw_node_security_options_t * security_options,
+  bool localhost_only)
 {
   return create_node(
-    rti_connext_dynamic_identifier, context, name, namespace_, domain_id, security_options);
+    rti_connext_dynamic_identifier, context, name, namespace_, domain_id, security_options,
+    localhost_only);
 }
 
 rmw_ret_t
diff --git a/rmw_connext_shared_cpp/include/rmw_connext_shared_cpp/node.hpp b/rmw_connext_shared_cpp/include/rmw_connext_shared_cpp/node.hpp
index ab2fa407..4f953995 100644
--- a/rmw_connext_shared_cpp/include/rmw_connext_shared_cpp/node.hpp
+++ b/rmw_connext_shared_cpp/include/rmw_connext_shared_cpp/node.hpp
@@ -27,7 +27,8 @@ create_node(
   const char * name,
   const char * namespace_,
   size_t domain_id,
-  const rmw_node_security_options_t * options);
+  const rmw_node_security_options_t * options,
+  bool localhost_only);
 
 RMW_CONNEXT_SHARED_CPP_PUBLIC
 rmw_ret_t
diff --git a/rmw_connext_shared_cpp/src/node.cpp b/rmw_connext_shared_cpp/src/node.cpp
index c2bcec39..cce87c78 100644
--- a/rmw_connext_shared_cpp/src/node.cpp
+++ b/rmw_connext_shared_cpp/src/node.cpp
@@ -32,7 +32,8 @@ create_node(
   const char * name,
   const char * namespace_,
   size_t domain_id,
-  const rmw_node_security_options_t * security_options)
+  const rmw_node_security_options_t * security_options,
+  bool localhost_only)
 {
   RCUTILS_CHECK_ARGUMENT_FOR_NULL(context, NULL);
   RMW_CHECK_TYPE_IDENTIFIERS_MATCH(
@@ -58,6 +59,19 @@ create_node(
     RMW_SET_ERROR_MSG("failed to get default participant qos");
     return NULL;
   }
+
+  if (localhost_only) {
+    status = DDS::PropertyQosPolicyHelper::add_property(
+      participant_qos.property,
+      "dds.transport.UDPv4.builtin.parent.allow_interfaces",
+      "127.0.0.1",
+      DDS::BOOLEAN_FALSE);
+    if (status != DDS::RETCODE_OK) {
+      RMW_SET_ERROR_MSG(
+        "failed to add qos property to set localhost as the only network interface");
+      return NULL;
+    }
+  }
   // This String_dup is not matched with a String_free because DDS appears to
   // free this automatically.
   participant_qos.participant_name.name = DDS::String_dup(name);