Using navicat, error ERROR 2003- Can't connect to MySQL server on 'xx.xx.xx.xx' (10013 “unknown error”)

If the port 3306 of the local telnet database server is connected. Check to see if the security software (Huorong will block) or the firewall on the operating system has blocked the navicat data, you can try it by closing the firewall or exiting the security software