VMware Tanzu Application Service Compliance
Address resolution for clients that need to reach endpoints at the external interface of Tanzu Application Service (TAS for VMs) (such as applications hosted in TAS for VMs, or the UAA or Cloud Controller endpoint) are the responsibility of the deployer. The client will rely upon the DNS configuration of the endpoint device.
Address resolution internal to the TAS for VMs foundation is managed by BOSH DNS. As BOSH is responsible for assigning IP addresses for TAS for VMs platform jobs (BOSH releases), it also orchestrates name resolution for these addresses. Security of this name-to-address resolution is based on the trust relationship between the BOSH director and the BOSH agents. Address resolution for applications running within the TAS for VMs runtime container is delegated to the DNS specified by the operator, using the Tanzu Operations Manager, or the IaaS supplied DNS.
See also the information provided for the related control SC-20.
Control Description
The information system requests and performs data origin authentication and data integrity verification on the name/address resolution responses the system receives from authoritative sources.
Supplemental Guidance
Each client of name resolution services either performs this validation on its own, or has authenticated channels to trusted validation providers. Information systems that provide name and address resolution services for local clients include, for example, recursive resolving or caching domain name system (DNS) servers. DNS client resolvers either perform validation of DNSSEC signatures, or clients use authenticated channels to recursive resolvers that perform such validations. Information systems that use technologies other than the DNS to map between host/service names and network addresses provide other means to enable clients to verify the authenticity and integrity of response data.
