I hope security has been taken into account in scenarious where two services share the same port number as some authentication protocols, such as SSL and CSI v2 (in its 'session' support), operate at no finer granularity than an individual port. If two such services were sharing a port and such an authentication protocol was in use, it would be essential for the authentication requirements of the services to be consistent with each other. For example, if one service permitted certain clients to assert their identity, then the other service would have to do the same. Just a thought...
Glyn
