A GDS is a Server which allows other SecurityAdmins to search for Clients that support reverse connnect within the administrative domain of the GDS. The SecurityAdmin uses the Call service to invoke the QueryApplications Method (see 6.6.11) with “RCP” as a serverCapabilityFilter to get a list of Clients that support reverse connect from the GDS.
The discovery process is illustrated in Figure 5.
The ClientUrls are returned in the DiscoveryUrls parameter of the ApplicationDescription record and have the ‘rcp+’ prefix. DiscoveryUrls without the prefix are used for forward connections. Once the SecurityAdmin has a ClientUrl it can configure the Server to use it.