When you add or modify a service for IPv6, keep in mind the following caveats:
You need to specify the proto value as tcp6, sctp6, or udp6 to enable both IPv4 or IPv6 connections. If you specify the value for proto as tcp, sctp, or udp, the service uses only IPv4.
Though you can add a service instance that uses one-to-many style SCTP sockets for inetd, this is not recommended. inetd does not work with one-to-many style SCTP sockets.
If a service requires two entries because its wait-status or exec properties differ, then you must create two instances/services from the original service.