What happens if navicat is not connected?

Reasons for Navicat connection failure include: Database service not started Invalid server address Invalid port number Invalid username/password Firewall blocking connection Server version incompatibility Database server closed Network connection problems Other factors (such as log files Error message in Connecting to the database may be due to the following reasons:

1. The database service is not started

Check whether the database instance is running.

2. Invalid server name/IP address

• Make sure you are using the correct server name or IP address.
• If you are not sure about the server address, please consult your database administrator or check the database configuration file.

3. Invalid port number

• Check whether the port number used is correct.
• If you are not sure about the port number, please consult your database administrator or check the database configuration file.

4. Invalid username/password

• Make sure the username and password used are correct.
• If you forget your password, please reset the password of the database user.

5. Firewall blocks connection

• Check whether the firewall settings allow Navicat to access the database server.
• If the firewall blocks the connection, create a rule in the firewall that allows access.

6. The server version is incompatible

• Make sure that the Navicat version is compatible with the database server version.
• If it is not compatible, please update Navicat or use a compatible Navicat version.

7. Database server shut down

• Check whether the database server has been shut down or stopped.
• In this case, the database server needs to be restarted.

8. Network connection issues

• Make sure there is a stable network connection between the local computer and the database server.
• Try to reconnect or check whether the network settings are correct.

9. Other factors

• Check the Navicat or database server log files for other possible error messages.
• If the problem still cannot be solved, please contact the database administrator or Navicat technical support.

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