diff --git a/README.md b/README.md
index cba0881bb..3fbbae76f 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ functionality:
 - `PROVISIONING_INTERFACE` - interface to use for ironic, dnsmasq(dhcpd) and
    httpd (default provisioning, this is calculated if the above
    `PROVISIONING_MACS` is provided)
+- `PROVISIONING_IP` - the specific IP to use (instead of calculating it based on
+  the `PROVISIONING_INTERFACE`)
 - `DNSMASQ_EXCEPT_INTERFACE` - interfaces to exclude when providing DHCP address
   (default `lo`)
 - `HTTP_PORT` - port used by http server (default `80`)
@@ -82,6 +84,14 @@ functionality:
 - `IRONIC_CONDUCTOR_HOST` - Host name of the current conductor (only makes
    sense to change for a multinode setup). Defaults to the IP address used
    for provisioning.
+- `IRONIC_EXTERNAL_IP` - Optional external IP if Ironic is not accessible on
+  `PROVISIONING_IP`.
+- `IRONIC_EXTERNAL_CALLBACK_URL` - Override Ironic's external callback URL.
+  Defaults to use `IRONIC_EXTERNAL_IP` if available.
+- `IRONIC_EXTERNAL_HTTP_URL` - Override Ironic's external http URL. Defaults to
+  use `IRONIC_EXTERNAL_IP` if available.
+- `IRONIC_INSPECTOR_CALLBACK_ENDPOINT_OVERRIDE` - Override Inspector's callback
+  URL. Defaults to use `IRONIC_EXTERNAL_IP` if available.
 
 The ironic configuration can be overridden by various environment variables.
 The following can serve as an example:
diff --git a/scripts/configure-ironic.sh b/scripts/configure-ironic.sh
index 6e36113a0..2fe5e9dff 100755
--- a/scripts/configure-ironic.sh
+++ b/scripts/configure-ironic.sh
@@ -61,13 +61,13 @@ export IRONIC_BASE_URL=${IRONIC_BASE_URL:-"${IRONIC_SCHEME}://${IRONIC_URL_HOST}
 export IRONIC_INSPECTOR_BASE_URL=${IRONIC_INSPECTOR_BASE_URL:-"${IRONIC_INSPECTOR_SCHEME}://${IRONIC_URL_HOST}:${IRONIC_INSPECTOR_ACCESS_PORT}"}
 
 if [[ -n "$IRONIC_EXTERNAL_IP" ]]; then
-    export IRONIC_EXTERNAL_CALLBACK_URL="${IRONIC_SCHEME}://${IRONIC_EXTERNAL_IP}:${IRONIC_ACCESS_PORT}"
+    export IRONIC_EXTERNAL_CALLBACK_URL=${IRONIC_EXTERNAL_CALLBACK_URL:-"${IRONIC_SCHEME}://${IRONIC_EXTERNAL_IP}:${IRONIC_ACCESS_PORT}"}
     if [[ "$IRONIC_VMEDIA_TLS_SETUP" == "true" ]]; then
-        export IRONIC_EXTERNAL_HTTP_URL="https://${IRONIC_EXTERNAL_IP}:${VMEDIA_TLS_PORT}"
+        export IRONIC_EXTERNAL_HTTP_URL=${IRONIC_EXTERNAL_HTTP_URL:-"https://${IRONIC_EXTERNAL_IP}:${VMEDIA_TLS_PORT}"}
     else
-        export IRONIC_EXTERNAL_HTTP_URL="http://${IRONIC_EXTERNAL_IP}:${HTTP_PORT}"
+        export IRONIC_EXTERNAL_HTTP_URL=${IRONIC_EXTERNAL_HTTP_URL:-"http://${IRONIC_EXTERNAL_IP}:${HTTP_PORT}"}
     fi
-    export IRONIC_INSPECTOR_CALLBACK_ENDPOINT_OVERRIDE="https://${IRONIC_EXTERNAL_IP}:${IRONIC_INSPECTOR_ACCESS_PORT}"
+    export IRONIC_INSPECTOR_CALLBACK_ENDPOINT_OVERRIDE=${IRONIC_INSPECTOR_CALLBACK_ENDPOINT_OVERRIDE:-"https://${IRONIC_EXTERNAL_IP}:${IRONIC_INSPECTOR_ACCESS_PORT}"}
 fi
 
 IMAGE_CACHE_PREFIX=/shared/html/images/ironic-python-agent