The sshd daemon that comes with the Solaris 9 & 10 Operating System uses TCP (Transmission Control Protocol) Wrappers (also called “libwrap”) to control access to hosts.
(Unlike other systems, Solaris 9 & 10 does not use the OpenSSH keywords “AllowHosts” and “DenyHosts” to permit or prevent SSH [Secure Shell] connections).
TCP wrapper support is compiled into the sshd binary and sshd, which runs as a standalone daemon. (Unlike other services, the Solaris 9 & 10 Operating System Secure Shell daemon is not under the control of inetd and tcpd.)
If sshd is running, and if the wrapper access control files are present and correctly configured, you have all that you need to control host access. Full Story