MySQL connection over SSH tunnel - how to specify other MySQL server?
MysqlSsh TunnelMysql Problem Overview
I've got ~50 databases all set up at different host names, with the requirement that I connect to them through an SSH tunnel.
For example:
-
SSH host at
ssh.example.com
-
MySQL host at
mysql1.example.com
I have managed to create the tunnel using autossh (web server running Debian), but I can't seem to figure out how to connect to a specific MySQL hostname "beyond" the SSH tunnel.
Typing lsof -i -n | egrep '\<ssh\>'
confirms that the tunnel is working (sends port 3307 to ssh.example.com port 3306)
So when I try mysql -h 127.0.0.1 -P 3307
I get Connection refused. Not too weird since it's not an MySQL server.
My question to you guys:
How do I specify the mysql1.example.com
host AFTER creating the SSH tunnel? I've tried searching everywhere but can't seem to figure it out.
Mysql Solutions
Solution 1 - Mysql
Solved it! The thing was to connect to the correct server when creating the tunnel itself - should've seen that one coming.
ssh -f [email protected] -L 3307:mysql1.example.com:3306 -N
Then mysql -h 127.0.0.1 -P 3307
worked as intended. :)
Solution 2 - Mysql
When you don't have direct access to mysql-server
, you use jump-server
.
From your machine, you connect(ssh) to jump-server and from there you connect to your mysql-server
.
This can be avoided by using ssh- tunneling
.
Suppose your
jump server is `jump-ip`
mysql server is `mysql-ip`
your machine is `machine-ip`
Just open ssh client(Putty in windows or terminal in linux/ios).
Type:
ssh -L [local-port]:[mysql-ip]:[mysql-port] [jump-server-user]@[jump-ip]
After this, you can use your localhost
and local-port
to access mysql-server on the remote machine directly.
Eg. Your Jdbc url to access mysql database, in that case, will be
jdbc:mysql://localhost:[local-port]/[database-name]
For Windows Users, Using Putty to connect to remote MySQL Server via Tunneling
Step1: Enter your Jump server Host/IP in the session tab
Step2: Go to SSH
tab--> Tunnels
: Enter Your MySQL server HostName: Port as destination and Source port as your local port where you want to tunnel that service and click on Add
Step3: Go back to Session tab and click on Open
and Enter your credentials, if it is Username/Password based.
And use same credential as mentioned above:
jdbc:mysql://localhost:[local-port]/[database-name]
Solution 3 - Mysql
I got a nice blog about how to connect to MySQL using SSH tunnel. It is very well explained here.
The command to connect to SSH tunnel:
ssh -L [listening port]:[REMOTE_MYSQL_HOST]:[REMOTE_MYSQL_PORT] [SSH_USER]@[SSH_HOST]
The command to connect to MySQL:
localhost:[listening port]
Solution 4 - Mysql
I created a tunnelto the DB using this command
ssh -L 10000:localhost:3306 user@<ip addess to connect DB> -N -f
-L is local host port it is user defined u can provide any port number
between 0 to 65535. 0 to 1023 are reserved.
whether you are using key based authentication to the server you should
mention the key like this.
ssh -i <path of the private key> -L 10000:localhost:3306 user@<ip addess to connect DB> -N -f