/etc/ is in freeradius-dialupadmin 2.1.12+dfsg-1.2ubuntu8.
This file is owned by root:root, with mode 0o755.
..
/etc/freeradius-dialupadmin/
/etc/freeradius-dialupadmin/config.php
/etc/freeradius-dialupadmin/admin.conf
/etc/freeradius-dialupadmin/user_edit.attrs
/etc/freeradius-dialupadmin/apache2.conf
/etc/freeradius-dialupadmin/extra.ldap-attrmap
/etc/freeradius-dialupadmin/sql.attrmap
/etc/freeradius-dialupadmin/captions.conf
/etc/freeradius-dialupadmin/naslist.conf
/etc/freeradius-dialupadmin/sql.attrs
/etc/freeradius-dialupadmin/username.mappings
/etc/freeradius-dialupadmin/default.vals
/etc/freeradius-dialupadmin/auth.request
/etc/freeradius-dialupadmin/accounting.attrs