Error 2003 while connecting to a remote Linux server SQLyog
Solutions:
1.cmd ping get through.
2. telnet detection can not connect to the host
Solving steps:
1. The need to open ports in cent7, the need to open firewall ports open.
systemctl stop firewalld.service turn off the firewall
systemctl start firewalld.service open the firewall
2. Specify the need to open ports
firewall-cmd --zone=public --add-port=3306/tcp --permanent
Return success
3. reload firewall
firewall-cmd --reload
4. View open ports
firewall-cmd --list-ports
cmd can be detected using telnet directly into the shows a success
SQLyog can connect successfully.