RFC 3588:Diameter Base Protocol
RFC-Ref

inter-domain


Click on the red underlined text to get to the source

... authorization schemes for each application. This limits the usefulness of IPsec in inter-domain AAA applications (such as roaming ...
... provide universal support for transmission-level security, and enable both intra- and inter-domain AAA deployments, IPsec ...
... Internet [PROXYCHAIN]. By providing explicit support for inter-domain roaming and message routing (Sections 2.7 ...


... NAS to support certificates. It is also suggested that inter-domain traffic would primarily use TLS ...


... proxy. For protection of inter-domain exchanges, TLS is recommended. See Sections 13.1 and 13.2 for more details on IPsec ...



Google
Web
RFC-Ref