Check whether the connection information is correct and confirm that the port number, database name, user name and password are correct. Check if the firewall is blocking the connection and add Navicat as whitelist. Make sure the database server is running and check the log files for error messages. Confirm that the network connection is normal and try to test the connection using ping. Other possible causes include driver, character set, version incompatibility, insufficient permissions, and network congestion.
What should I do if Navicat fails to connect?
There are many reasons why Navicat fails to connect to the database. The following are common solutions:
Check the connection information
- Confirm Check whether the entered database server IP address or host name is correct.
- Make sure the port number entered is consistent with the database server configuration.
- Make sure the database name, username and password entered are correct.
Check the firewall
- Make sure the firewall is not blocking communication between Navicat and the database server.
- Add Navicat to the firewall's whitelist.
Check the database server status
- Make sure the database server is running.
- Check the database server's log file for error messages.
Check the network connection
- Make sure the computer can connect to the network where the database server is located.
- Try to test the connection using other network tools such as ping.
Other Possible Causes
- Driver issues: Make sure the correct driver for the database server is installed.
- Character set problem: The character sets used by Navicat and the database server must match.
- Version incompatibility: The Navicat version may be incompatible with the database server version.
- Permission issues: Make sure the user has the required permissions to connect to the database.
- Network congestion: Network congestion will affect connection speed and success rate.
Additional Tips
- Try using Navicat's diagnostic tools to identify the problem.
- Check Navicat's help file or online documentation for more detailed troubleshooting information.
- Contact the database server administrator or Navicat support for assistance.
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