The SVM on-premise user is unable to log in at SVM On-premise console and getting a Connection Failed Error. Please follow the below steps to resolve your issue.

Steps:

Log in to your DB server 

mysql -u root -p

Search the private DB user (The private DB is usually a customer id of the server)

select user, host, password from mysql.user;

Run the following command to update the user

update mysql.user set host = '%' where user = 'enter DB user here';

Run the command to flush the privileges and restart the DB service

FLUSH PRIVILEGES; 
or
mysql or mariadb service restart

Stop the following services

service httpd stop
service haproxy stop 

Run the dbpdb.sh from /usr/local/Secunia/csi/install and follow instructions

cd /usr/local/Secunia/csi/install
./dbpdb.sh

Start the apache and haproxy service

service httpd start 
service haproxy start

Important: Stopping and restarting services are handled in dbpdb.sh script now and this feature is only available in RPM's and not VA(Virtual Appliance).