I have allowed remote connections to mysql. I can successully connect from the console of another machine.
I have some php files on another server but I cant connect to the same mysql db from php.
This is the way I'm doing it:
mysql_pconnect("theipaddress","username","password")
or die("Unable to connect to db server");
Now bear in mind I am using the same creds which I successfully used in the console. I even tried putting the port after the ip but no joy.
Any ideas?
You must have a user in MySQL who is allowed to connect from % (any host) (see manual for details).
Have you selinux installed? Maybe selinux is not allowing apache to make remote connections? If yes, type:
setsebool -P httpd_can_network_connect=1
Related
I'm trying to learn to use SQL stuff in PHP but I'm having an issue simply connecting to my database.
The database is almost certainly working with remote access to some extent. I disabled iptables temporarily (I know, bad bad bad!), so there's no firewall blocking access. The MySQL user I am using is configured to be able to connect from any IP. The SQL server is listening properly to all connections and is run on a Linux dedicated server.
[root#1742CC-XEON ~]# netstat -lpnut | grep mysql
tcp 0 0 0.0.0.0:3315 0.0.0.0:* LISTEN 3915/mysqld
I've also used the exact same credentials to successfully remotely connect to my database in Java, like so:
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://__ip__:_port_/_dbname_", "username", "password");
System.out.println("Connection established.");
This functions just fine, and I can successfully run queries, etc. Since I have iptables disabled at the moment this connection functions just fine anywhere that has Java and the Java SQL connector.
Now, I'm trying to connect to the same database in PHP:
$db = mysqli_connect($sql_host, $sql_user, $sql_pass, $sql_db, $sql_port);
And this connection fails with the following error:
Warning: mysqli_connect(): (HY000/2003): Can't connect to MySQL server on 'xx.xx.xx.ip' (111)
Note that $sql_user, $sql_pass, $sql_host, etc. are all the same as the credentials used in the Java connection, so there shouldn't be any issue with the user not being able to access the server from a new IP, since that user is granted access on % and I've made sure that it is indeed able to access the SQL server from multiple IPs not explicitly allowed in the users table. I've also tried different users, including root, and all give the same connection error.
I've spent a few hours looking around but I honestly can't find anything that seems to be the right answer, would really appreciate any help!
Is it possible that this is caused by my webhost? I've tried this script on HostGator webhost as well as the whois.com hosting and both give the same error. Could they possibly be preventing the PHP script from connecting to the remote database?
Have you tried telneting to the server on 3315 from your webhosts?
I have an application designed in mysql and php. Earlier this app was working fine. But now it is not. Its giving me an error :
***Failed to connect to MySQL: Can't connect to local MySQL server through socket
'/var/lib/mysql/mysql.sock' (2)***
How can I resolve this error ?
The application is running on a redhat machine.
Does the directory "/var/lib/mysql" exist? also please check your mysql user (or better, mysql group) have writer permission. If so, please try re-starting mysql and see what happens
You must follow the below steps to debug the error:-
start mysql engine.
check below database connecting variable
a. host name
b. username
c. password
d. database name
now check query for connecting with mysql.
now check whether it's able to connect with database or not.
I think this will help You to resolve the problem. If it persists then let me know.
Reference link you may find the solution.According to the link it says:
Are you connecting to "localhost" or "127.0.0.1" ? I noticed that when you connect to "localhost" the socket connector is used, but when you connect to "127.0.0.1" the TCP/IP connector is used. You could try using "127.0.0.1" if the socket connector is not enabled/working.
i think your mysql server is not running. Make sure your mysql server is running
use
# mysqladmin -u root -p status
to check status
if it is running , try to connect from command line. And execute some simple select statement from command line. If your are able to do that, make sure that username and password (used in command line) are used in your application too.
If your are application working sometime and sometime not, in that case make sure you are closing connections in your program after use.
I've done a bit of research on this today, but nothing seems to address this issue. I recently upgraded to PHP 5.3.3 from 5.1.6, as well as upgraded MySQL to 5.5 from 5.0. Afterwards, the following code generates an error saying "Can't connect to mysql database":
$connection = mysql_pconnect($dbhost, $dbusername, $dbpassword);
if (!$connection) {
//Can't connect
die('Could not connect: ' . mysql_error());
return;
}
And get the following error:
Warning: mysql_pconnect(): Can't connect to MySQL server on '199.59.157.103' (13) in /var/www/html/ws/Cust/customerWS_1_1.php on line 19 Could not connect: Can't connect to MySQL server on '199.59.157.103' (13)
I am able to connect to the remote host via the command line, and have tried everything from resetting the password to shutting down IP Tables. I'm kind of at a loss - so any help would be appreciated.
We had a similar problem with the same error message "Can't connect to mysql database" and maybe the following points will be also usefull:
check mysql user privileges (in our case and with external connections we had the old server IP address (allow access) in the table) GRANT ALL PRIVILEGES ON tablename.* TO 'username'#'145.1.1.2';
-> reload privileges after changes (FLUSH PRIVILEGES;)
disable the SELinux parameter. In new Plesk versions (>10?) this would be set enabled automatically...
--> in /etc/selinux/config change the line that says:
SELINUX=enforcing to SELINUX=disabled
See further details: http://googolflex.com/?p=482
There is a PHP 5.3 mysql driver restriction related to old authentication scheme hash stored in the database by previous mysql server. This could cause a problem with stored passwords so the databases will be unaccessible with old passwords.
To solve the problem you should recreate the mysql users with the same login and same password.
When you say "I am able to connect to the remote host via the command line" do you mean, you are connecting to the MySQL server REMOTELY? Or that you are SSHing to your MySQL server and connecting to it from the MySQL server's command line? If the latter, it's possible that when you upgraded to MySQL 5.5 you accidentally stopped MySQL from binding / listening on a public IP. Check your my.cnf.
Otherwise: is your PHP code being run on the same server as your MySQL server? It's possible that your permissions could be off. MySQL permissions are very particular about connecting to the MySQL server via it's IP address if the client only has access to connect from 'localhost', and vice-versa.
First you should make sure that the connect parameters $dbhost, $dbusername and $dbpassword are correct. Assuming these are correct, you should check your mysql ini settings. I would assume that the bind-address is set to 127.0.0.1 or localhost, but not to a public IP address.
Also note that it's a security risk if you can connect to mysql from a public IP address. You may want to look into a solution that does not require such connection.
How to log with a diferent user in a MYSQL remote database?
Here's what I've done:
Logged as root in the MYSQL:
'create user 'user'#'%' IDENTIFIED BY 'password';
'grant select on *.* to 'user'#'%';
Then I setted a PHP script which connection is this one:
$con = mysql_pconnect("xxx.xx.xxx.xxx","user","password");
$selected = mysql_select_db("database",$con);
Aaaand it isn't working:
I'm using LAMP on a cloud server, by the way;
Warning: mysql_pconnect() [function.mysql-pconnect]: Can't connect to MySQL server on 'xxx.xx.xxx.xx' (10061) in D:\path\index.php on line 21
What am I doing wrong?
EDIT: Not a firewell issue;
You might want to check the MySQL documentation on this specific problem. If I had to guess, I would say that your MySQL server may be bound only to the local (127.0.0.1) address. To troubleshoot you should probably try connecting to the server using the command line MySQL client in order to get a better idea of why exactly the connection isn't being made.
Seems to me like a firewall issue. You should check if the machine hosting the MySQL server allows connection on the port 3306 from external IPs as well.
Check if the server you have to connect to has the firewall open on the port you are trying to connect... default port is 3306
you can use
mysqladmin -h localhost
to see check what is the port mysql is using
I am attempting to connect to a remote MySQL server from my local machine virtualhost using the following code:
$conn = mysql_connect("$dbhost", "$dbuser", "$dbpass") or die(mysql_error());
mysql_select_db($dbname, $conn) or die(mysql_error());
My problem is that I am unable to connect locally, receiving the error:
Can't connect to MySQL server on 'xxx.xxx.xxx.xxx' (10060)
This is not the case when I upload the same PHP file to the server. I am able to query the database with no problems at all.
I am unable to connect via command line either, but I can access cPanel which rules out the chance of my IP being banned accidentally.
My local server is running PHP 5.2.9, the remote server 5.2.12
firewall of the server must be set-up to enable incomming connections on port 3306
you must have a user in MySQL who is allowed to connect from % (any host) (see manual for details)
The current problem is the first one, but right after you resolve it you will likely get the second one.
It is very easy to connect remote MySQL Server Using PHP, what you have to do is:
Create a MySQL User in remote server.
Give Full privilege to the User.
Connect to the Server using PHP Code (Sample Given Below)
$link = mysql_connect('your_my_sql_servername or IP Address', 'new_user_which_u_created', 'password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_select_db('sandsbtob',$link) or die ("could not open db".mysql_error());
// we connect to localhost at port 3306
I just solved this kind of a problem.
What I've learned is:
you'll have to edit the my.cnf and set the bind-address = your.mysql.server.address under [mysqld]
comment out skip-networking field
restart mysqld
check if it's running
mysql -u root -h your.mysql.server.address –p
create a user (usr or anything) with % as domain and grant her access to the database in question.
mysql> CREATE USER 'usr'#'%' IDENTIFIED BY 'some_pass';
mysql> GRANT ALL PRIVILEGES ON testDb.* TO 'monty'#'%' WITH GRANT OPTION;
open firewall for port 3306 (you can use iptables. make sure to open port for eithe reveryone, or if you're in tight securety, then only allow the client address)
restart firewall/iptables
you should be able to now connect mysql server form your client server php script.
This maybe not the answer to poster's question.But this may helpful to people whose face same situation with me:
The client have two network cards,a wireless one and a normal one.
The ping to server can be succeed.However telnet serverAddress 3306 would fail.
And would complain
Can't connect to MySQL server on 'xxx.xxx.xxx.xxx' (10060)
when try to connect to server.So I forbidden the normal network adapters.
And tried telnet serverAddress 3306 it works.And then it work when connect to MySQL server.