AWS Mainframe Modernization Service (Managed Runtime Environment experience) is no longer open to new customers. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html).

# Configure URI accessibility for Gapwalk applications
<a name="ba-runtime-filteringURIs"></a>

This topic describes how to configure the filtering of URIs for Gapwalk applications. This feature does not require an identity provider (IdP).

To block a list of URIs, add the following two lines to the `application-main.yml` of your modernized application, replacing *URI-1*, *URI-2*, and so on, with the URIs that you want to block.

```
gapwalk-application.security.filterURIs: enabled
gapwalk-application.security.blockedURIs: URI-1, URI-2, URI-3
```