= Specifying the list of the allowed sources based on which CDEs can be started With this release, you can specify the list of URLs based on which Cloud Development Environments (CDEs) can be initialized using the dedicated optional `allowedSources` CheCluster CR property: [source, code] ----      "devEnvironments": {        "allowedSources": {          "urls": ["url_1", "url_2"]        } ---- NOTE: When using this property, if a particular URL is not allowed explicitly by the admin, users will not be able to initialize and create CDEs based on this source. Learn more about this feature in the DOWNSTREAM LINK NEEDED [official documentation]( https://eclipse.dev/che/docs/stable/administration-guide/configuring-allowed-urls-for-cloud-development-environments/ ).