Tcpd prints "connect (refused) from 0.0.0.0" in Solaris 8 and later?

The default inetd configuration in Solaris 8 and later have changed
the service type for most services from tcp/udp to tcp6/udp6.

You'll either need to change them back to tcp/udp or better, upgrade
your tcp wrappers to an IPv6 capable version as described in 4.17.