By default, direct access to server IP address displays the sentora panel login page.
This is because the first virtual host in the virtual-host list is assumed to be the default host for any request that does not match any entry in the list.
It may be a convenient way to access the panel, but mostly not wanted.
The simpler way to disable it is to create a default virtual host that will returns an error.
1) Edit the file /etc/sentora/configs/apache/httpd.conf
Insert in it, just BEFORE the lasts line that includes the httpd-vost.conf file the following block :
#Default apache vhost to lock direct IP access to panel
Require all denied
2) reload gracefully apache config, according to your OS
apachectl -k graceful
systemctl restart httpd