http://www.rfc-editor.org/rfc/rfc8071.txt
RFC 8071: NETCONF Call Home and RESTCONF Call Home, K. Watsen2017-02-01T23:00:00-00:00This RFC presents NETCONF Call Home and RESTCONF Call Home, which enable a NETCONF or RESTCONF server to initiate a secure connection to a NETCONF or RESTCONF client, respectively.