The error found in the log:
" /etc/pam.conf writable by group" shows that the /etc/pam.conf permission is not safe thus the system failed the pam calling from dzdo,
Generally, the /etc/pam.conf is owned by root and not writable by group.
In this particular case, the permissions of /etc/pam.conf were modified to allow group to write and so when dzdo calls pam_open, it failed or got sysalertmsg..
The permission of /etc/pam.conf file needs to be '600' or '644' and then centrifydc should be restarted.
# chmod 644 /etc/pam.conf