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

Robert Michael Kim

Apr 08, 2025 pm 11:00 PM

mysqlnavicatSolution

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 cannot connect to MySQL/MariaDB/PostgreSQL and other databases

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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