Finger daemon as well as client command are part of the "SUNWrcmds" Solaris package. It is possible that someone uninstalled it from your box. You can check it with: pkginfo -l SUNWrcmds
Well, you didn't include the "LIST" part. It is very important in this case as it would show only the ports open for connections. Anyway from that you posted it is clear that finger is not running on...