Solved

Not able to connect to MySQL from client machine

Posted on 2006-06-28
12
449 Views
Last Modified: 2008-02-01
Hi everybody,

I have successfully installed my first MySQL based VB6 application on the server. I have used the connection string

"DRIVER={MySQL ODBC 3.51 Driver};SERVER=merline;DATABASE=test;USER=merline;PASSWORD=password02;Port=3306;OPTION=3;", which is working absolutely fine on the server.

However, when I try to run the application from a client machine using the connection string "DRIVER={MySQL ODBC 3.51

Driver};SERVER=merline;DATABASE=test;USER=ADMIN;PASSWORD=password02;Port=3306;OPTION=3;", the following error message shows up: "Host '192.168.0.20' is not allowed to connect to this MySQL server.". 'ADMIN' is the host name of the client machine.

I have created the user 'ADMIN' & granted rights to it with the following commands:
CREATE USER 'ADMIN'@'merline.srpfpl.com' IDENTIFIED BY 'password02';
GRANT ALL ON *.* TO 'ADMIN'@'merline.srpfpl.com';

I have also tried replacing 'ADMIN' with '192.168.0.20' in the above 2 commands, but still it doesn't work.

Please help me out.
0
Comment
Question by:utpal_nandi
  • 6
  • 4
  • 2
12 Comments
 
LVL 35

Expert Comment

by:Raynard7
ID: 17007355
If you use mysql administrator - one of the startup options is "disable networking" if this has been chosen then it will not allow you to connect.

The problem does not seem to be one about the user as this generally gives a different message - the host (the computer you are trying to connect from) is not being allowed by the server.

The fact that you are getting the error message you are means that you are actually talking to the server - meaning you have the correct port; it just has a problem with your machine.

0
 
LVL 5

Expert Comment

by:Z03niE
ID: 17007481
universal remote host is noted with '%'.
so instead of 'merline.srpfpl.com' or '192.168.0.20' try '%'.
0
 

Author Comment

by:utpal_nandi
ID: 17007527
What could be the problem with the machine?  Is it hardware problem or OS problem or Firewall blocking the port?  What could be the possiblities?
0
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 
LVL 35

Expert Comment

by:Raynard7
ID: 17007539
As Z03niE said the problem relates to the fact that no users have the ability to connect from that given machine - try % and it should work.

It is not likley to be a problem with the machine.

The fact that you can connect locally means it should be good.

Try

CREATE USER 'ADMIN'@'%' IDENTIFIED BY 'password02';
GRANT ALL ON *.* TO 'ADMIN'@'%';

And see if that works.
0
 

Author Comment

by:utpal_nandi
ID: 17007548
To user universal remote host do I have to run the commands like this?:
CREATE USER '%' IDENTIFIED BY 'password02';
GRANT ALL ON *.* TO '%';
0
 

Author Comment

by:utpal_nandi
ID: 17007553
OK I'll try that
0
 

Author Comment

by:utpal_nandi
ID: 17017189
On trying:

CREATE USER 'ADMIN'@'%' IDENTIFIED BY 'password02';
GRANT ALL ON *.* TO 'ADMIN'@'%';

I got the following error message on trying to connect to MySQL server from the machine 'ADMIN':

MySQL ODBC 3.51 driver access denied for user 'admin'@'ADMIN' (using password 'YES').
0
 
LVL 35

Expert Comment

by:Raynard7
ID: 17021891
Try

update mysql.user set user='ADMIN', host='%', select_priv='Y', insert_priv='Y', update_priv='Y', delete_priv='Y', create_priv='Y', drop_priv='Y', reload_priv='Y', shutdown_priv='Y', process_priv='Y', file_priv='Y', grant_priv='Y', references_priv='Y', index_priv='Y', alter_priv='Y' where user='ADMIN' and host='%'

as your query,

also remembering that usernames can be case sensitive - so ADMIN is different to admin
0
 

Author Comment

by:utpal_nandi
ID: 17023688
Even after running the update command, I still get the same error message:
MySQL ODBC 3.51 driver access denied for user 'admin'@'ADMIN' (using password:YES).

0
 
LVL 35

Assisted Solution

by:Raynard7
Raynard7 earned 250 total points
ID: 17025105
You need to change 'admin'@'ADMIN' to 'ADMIN'@'ADMIN' if you use lowercase admin and there is no user 'admin' just 'ADMIN' you will have problems
0
 
LVL 5

Accepted Solution

by:
Z03niE earned 250 total points
ID: 17028747
well, the good news is technically you have succeded connecting your client application to the server.The problem now is only the login permission.
What you need to do are :

1. try "select * from mysql.user" using root pass from the server.
Make sure that user "admin" has "%" as host.
2. If the above is correct and the client still can't connect then make sure that you use the correct password in the application.
0
 

Author Comment

by:utpal_nandi
ID: 17029387

Finally the following worked:

CREATE USER 'admin'@'%' IDENTIFIED BY 'password02';
GRANT ALL ON *.* TO 'admin'@'%';

The problem was with the case.  Many many thanks to both!!
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

All XML, All the Time; More Fun MySQL Tidbits – Dynamically Generate XML via Stored Procedure in MySQL Extensible Markup Language (XML) and database systems, a marriage we are seeing more and more of.  So the topics of parsing and manipulating XM…
Creating and Managing Databases with phpMyAdmin in cPanel.
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question