/etc/rplay/rplay.hosts is in rplay-server 3.3.2-14.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # default rplay.hosts
# see the rplay.hosts(5) for details on the format and meaning of this
# file
# give the localhost the default permissions
localhost
|