Heyho - it's Frankenstein again! While my 7 server multi setup (control, web, db, mail, ns1, ns2, ns3) i have some troubles while connecting to the mysql master server from my ns2 setup (install.php). sys info: debian 9.5 mysql users created on master with following commands: CREATE USER 'root'@'ip.of.ns2.server' IDENTIFIED BY 'my-pass'; GRANT ALL PRIVILEGES ON * . * TO 'root'@'ip.of.ns2.server' IDENTIFIED BY 'my-pass' WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ; CREATE USER 'root'@'ns2.domain.tld' IDENTIFIED BY 'my-pass'; GRANT ALL PRIVILEGES ON * . * TO 'root'@'ns2.domain.tld' IDENTIFIED BY 'my-pass' WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ; FLUSH PRIVILEGES; The ns1, db and mail had no problems while connecting. The code for the other ones is configured copy&paste from the one above. The root-password in my commands are the same from the respective ones root@localhost. checked #bind-adress 127.0.0.1 on 50-server.cf server is running good with no errors in mysql error log, syslog, auth log checked /etc/hosts checked /etc/hostname > ns2.domain.tld Struggle - any idea? Best regards Frankenstein //edit I've done a server rebuild and built it up the same time and way the ns3 - each step. ns3 had no problems while install.php - ns2 the same issue. //edit2 in my password was a \e what corrupts the password entry......solved