If client applications, which use ACSLS to mount tapes and manage tape libraries, are separated from ACSLS by a firewall, we recommend enabling the Firewall Secure Option. Even if the client applications are not separated from ACSLS by a firewall, implementing the Firewall Secure Option provides additional ACSLS security by restricting the ports used for communication between ACSLS and its client applications, as shown below. For these reasons, the CSI_FIREWALL_SECURE static variable defaults to TRUE in ACSLS 8.5.

For details, refer to the “Firewall Secure Option” appendix in the ACSLS Administrator’s Guide.