I've an application on windows forms that needs to connect to a remote server with a static ip, however I already installed mysql on the server, provided the next command
GRANT ALL PRIVILEGES ON *.* TO 'root'#'%' IDENTIFIED BY 'password' WITH GRANT OPTION; FLUSH PRIVILEGES;
and also put an exception in Windows Firewall, but I'm still unable to connect, I don't know if there is something else to do!, I forgot to say it is a Windows Server 2012 R2
This is not the issue with previliges of user. This is about connection rights. LIke mostly on CPanel we have an option of Remote MySQL. Under this option we either have to provide ip address which we want to allow to connect to mysql or wild card mask % to allow any ip to connect to the server. Check with your hosting how it allows you to connnect. yes these previliges are necessary thay you have given. that is ok but check Remote MySQl if you have cPanel.
Thanks
Check your logs and trap your errors.
Confirm your app can reach the sql port and connect. (From the windows machine, can you telnet to the sql port on the sql server?) If not, look at your firewall, and verify your sql instance is bound to a public ip as Bernd suggests.
Once you know the host can reach the sql server, verify your app is actually connecting. Trap errors from connect functions and read them out.
Then verify the credentials are accepted. Again, trap any errors and read them out in your program.
Then, when you're processing a sql statement, trap any errors and read them out to yourself in your program.
(You may find it useful to write a log file from your program containing any errors you detect on any line of code interacting with your database)
Once you've narrowed down where your issue actually is, a solution will probably present itself. Or at least you'll have narrowed it down, and can update us with a specific error message from where the failure has occured.
Good luck!
Related
I am using the following DBD::mysql statement to connect to a MySQL database:
use DBI;
# Connect to the database.
my $dbh = DBI->connect("DBI:mysql:database=test;host=localhost",
"usr", "usr's password",
{'RaiseError' => 1});
Is there a way to check if MySQL service is running, before trying to connect to the database? What if the database is running on a remote server?
If you want a solution to check if the service is running without attempting to connect to it, you could use some Perl package to check the process table (works locally only), or check that the MySQL port (3306 by default) has a process listening to it.
I'm not sure what the purpose of this check is, because even if the service is running, the next thing you'll probably want to do is open a DB connection. Opening a DB connection is a quick and easy thing to do, and it has good error reporting if it doesn't work. So your intention to check that the service is running first is just unnecessary overhead.
I would just try to connect as you are doing. This is the most direct way of checking that the service is running, and it works both locally and remotely.
If there's an error, catch the error and interpret the error message. It'll be error 2002 (for localhost) or 2003 (for TCP/IP, whether it's the same host or a remote host).
These errors are mostly reliable. But there could be red herrings, for example if the service is running on a remote host, but your client host can't reach it because of firewalls or routing issues.
If you get an error 1045 (Access Denied), at least you know the service is running and you can reach it, the problem is only that your user & password are incorrect, or you tried to access a schema you don't have privilege to use.
I have a MySql database running on a remote server which requires ssh authentication that I need to connect to with Microsoft Power BI. I can easily connect to MySQL on my localhost machine, but cannot find a way to manage both the server ssh authentication and the database user log on information.
The server requires authentication on port 22 with a username and password and the MySQL database requires a different username and password.
Can anyone offer assistance?
It seems possible to connect remotely, though I'm not sure you can do it through an 'SSH tunnel' on port 22.
There's a discussion here about connecting remotely which sounds to me like a connection to the usual port 3306, though I'm not certain:
https://community.powerbi.com/t5/Integrations-with-Files-and/Cannot-Connect-to-MySQL-on-Linux-VM/td-p/94914
Some common pitfalls:
1) Make sure you download the correct version of MySQL/Net connector. As of now, version 6.6.5 seems to be working. I wasted a lot of time trying to figure out what was wrong with earlier versions.
2) Server & database settings: closed ports / user permissions / bind-address
Before connecting PowerBI, try to connect another utility like MySQL Workbench. This will force you to troubleshoot the above settings.
This is not currently possible with PowerBI. The feature is currently under review, and you can help get it prioritized by upvoting here:
https://ideas.powerbi.com/forums/265200-power-bi-ideas/suggestions/7020353-mysql-over-ssh-connection
I don't think it is supported (yet) but it looks like a lot of people want a solution including me. See this Power BI Ideas Request
1) create gateway to connect server then
2) then it will ask connection string their you can give server port and database username and password
The problem turned out to be an error in the remote servers firewall configuration.
After further research I have confirmed that Power BI would not support dual authentication steps like logging onto a remote server with ssh and then connecting to the database. Thanks Robin for your suggestion. That was a key point.
Please remember that for remote connections you need to authorise the mysql users to connect from specific hosts (adding the IP) or % to allow to get connected from any host remotely
the SQL is something similar to:
GRANT ALL PRIVILEGES ON *.* TO 'root'#'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
FLUSH PRIVILEGES;
How to allow remote connection to mysql
I just exported my tables from one web host to another (AWS).
Thinking everything would go smoothly (yeah right), well, everything that can go wrong has gone wrong.
I get this error when trying to query my database (which I didn't get before):
SQLSTATE[HY000] [1130] Host '<my ip address>' is not allowed to connect to this MySQL server
This is the same error from this post:
Host 'xxx.xx.xxx.xxx' is not allowed to connect to this MySQL server
The solution in that post seems to revolve around having an administrative user. I am developing a chat application so every user needs to access the server (so I'm sure it's a bad idea to give them all administrative privileges).
The answer by Pascal in that link says, If you are using mysql for a client/server application, prefer a subnet address. but I honestly don't understand what he means by that. And because of the amount of solutions, I'm not exactly sure which one I should follow based on my case.
How do I resolve this?
MySQL has security tables that determine who is allowed to connect and from what host IP address.
Here's a good article on how to do it:
http://www.cyberciti.biz/tips/how-do-i-enable-remote-access-to-mysql-database-server.html
If you have a lot of connections, consider setting up a server to accept the connections and talk to the sql server. The easiest approach to this is to set up a REST interface and use a web server. Web servers are usually also highly optimized and relatively bug free.
In a similar architecture on AWS, I use nginx happily.
Make sure you have bind-address=YOUR-SERVER-IP in my.cnf and make sure you have a user hd1#172.31.39.86 or hd1#%, the latter being a MySQL wildcard on the MySQL server. More information here. You may also need to grant access to port 3306 (the default MySQL port) on the security groups section of the AWS console.
// IN YOUR MYSQL WORKBENCH You Have to Execute below query
CREATE USER 'root'#'1.2.1.5(Your Application Server IP)' IDENTIFIED BY 'pass';
GRANT ALL PRIVILEGES ON *.* TO 'root'#'10.200.1.54' WITH GRANT OPTION;
AFTER CREATING YOU CAN VIEW USING BELOW QUERY
SELECT * FROM mysql.user WHERE User = 'root';
i've setup a new mysql user on a server that allows access from other servers. i can access it from my dev machine using the credentials i setup.
But on one of my other servers nothing happens when trying to log into mysql using the same credentials that worked on my dev box. any ideas what it might be?
all it does is hang.
Nothing gets added to log files on either the new DB server or the one i'm trying to access from.
i also tested this connection from another server, just to test if my dev box was a fluke andi could access. So all i can think is there's something "wrong" with the server i cant access from.
Please post your query that executes to create this user and privileges.
If you can’t remember the queries you can execute this in your target server to get details about user
SHOW GRANTS for 'root'#'localhost';
You may check these things also .
Firewall setup for the server from the trouble machine.
Can this machine connect to another sql server provided with similar access?
Execute select * from mysql.user ; and check you don’t have duplicates with
different access privileges or passwords .
turns out i had everything setup correctly, as i said i was able to use the same user across other servers just not this one.
turns out my server provider had a network firewall restricting mysql connections. removed and hey presto.
thanks #csf
It seems that the web server is preventing me to change permissions to the user. It does not allow me to GRANT ALL ON foo.* TO bar#'202.54.10.20' IDENTIFIED BY 'PASSWORD'; and returns an error message of access denied for the username that I'm using.
It also appears that the folder etc in the file manager is empty whereas in the given link below, it shows that the bind address can be edited in the my.cnf inside etc folder.
How do I allow my mysql database to be accessible remotely by any computer?
http://www.cyberciti.biz/tips/how-do-i-enable-remote-access-to-mysql-database-server.html
The bind option in my.cnf is not that problem (since you can connect, the MySQL server is just not letting you in), and judging from the screenshot, you don't seem to have the permissions to edit that file anyways.
Most likely, your request is not coming from 202.54.10.20, or you have mistyped username/password. If the web application runs on the same machine as the MySQL server, connections will come from somewhere in the 127.0.0.0/8 range.
Look at the connection string in your web application:
If it is a public IP address, check username/password and originating IP.
If it starts with 127., GRANT to your local address.
If it is localhost, you're connecting via Unix socket instead of TCP. This is a good thing, and you can simply GRANT to localhost.
To issue this command:
GRANT ALL ON foo.* TO bar#'202.54.10.20' IDENTIFIED BY 'PASSWORD';
You MUST connect to the database first. So if you don't have permissions to remotely access database, you should go to the database server host and login locally, using root#localhost.
I just found out that there is an option which basically do the same thing as what I wanted it to be doing. There is an option for the user to enable remote database access to its clients.