Navicat cannot connect to MySQL/MariaDB/PostgreSQL and other databases

Common reasons why Navicat cannot connect to the database and its solutions: 1. Check the server's running status; 2. Check the connection information; 3. Adjust the firewall settings; 4. Configure remote access; 5. Troubleshoot network problems; 6. Check permissions; 7. Ensure version compatibility; 8. Troubleshoot other possibilities.

Navicat's solution to fail to connect to MySQL/MariaDB/PostgreSQL database

Problem: Navicat cannot connect to MySQL/MariaDB/PostgreSQL and other databases.

Solution:

Here are some common reasons why Navicat cannot connect to a database and their corresponding solutions:

1. Check if the server is running

• Make sure the MySQL/MariaDB/PostgreSQL server is running.
• Check the error log on the server side for any connection issues.

2. Check connection information

• Make sure that the connection information (host name, user name, password, port number) is correct.
• If using SSL, make sure the SSL certificate is configured correctly.

3. Firewall settings

• Check that the firewall allows Navicat to access the database server.
• Make sure the port (usually 3306, 3307, 5432) is opened.

4. Remote connection

• If you try to connect to the database remotely, make sure that remote access is configured correctly.
• On the server side, grant remote users connection permissions and allow remote connections.

5. Network connection issues

• Check if the network connection is stable.
• Try pinging the database server to verify the connection.

6. Permission issues

• Ensure that the connection user has permission to connect to the database and execute queries.
• On the database server, grant the user the necessary permissions.

7. Database version compatibility

• Make sure that the version of Navicat is compatible with the version of the database server.
• If the version is incompatible, upgrade Navicat or the database server.

8. Other reasons

• Check if Navicat is up to date.
• Try to connect to the database using another database client such as MySQL Workbench or pgAdmin.
• Restart Navicat and the database server.

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