The remote access control feature introduced in 15.7 SP50 prevents remote dumps and loads, and execution of remote procedure calls (RPCs) from any client or server that is running on unauthorized servers.
To support remote host control, allow_hosts_list has been added to the svrbuild.backup.server.rs resource file for configuring Backup Server using srvbuild and srvbuildres. This attribute accepts a comma separated list of hosts allowed.