/etc/security/zentyal.conf is in zentyal-core 2.3.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # Zentyal configuration file for pam_access.so
# only allow access to users in the sudo group
+ : (sudo) : ALL
- : ALL : ALL
|