MySQLdb + SSH Tunnel
OVERVIEW: I am running a script on one machine that connects to a MySQL database on another machine that is outside of our university's domain. According to the administrator, network policies do not allow the compute nodes to access machines outside of our university's domain. COMPUTERS: A = compute node within university (I do not have shell access) B = 2nd machine within university that does not block outside connections (I have root access) C = machine outside of university (I have root access) mysqldb on A cannot connect to C but. mysqldb on A can connect to B WHAT I WOULD LIKE TO DO: Is it possible to set something up where A talks to a port on B, and that port is actually nothing more than 3306 on C? Can I do this with an SSH tunnel? Can anyone please give precise instructions? -- http://mail.python.org/mailman/listinfo/python-list
Re: MySQLdb + SSH Tunnel
On 7/12/2009 12:18 PM Riley Crane said... OVERVIEW: I am running a script on one machine that connects to a MySQL database on another machine that is outside of our university's domain. According to the administrator, network policies do not allow the compute nodes to access machines outside of our university's domain. COMPUTERS: A = compute node within university (I do not have shell access) B = 2nd machine within university that does not block outside connections (I have root access) ...so B can talk to C presumably... C = machine outside of university (I have root access) mysqldb on A cannot connect to C but. mysqldb on A can connect to B WHAT I WOULD LIKE TO DO: Is it possible to set something up where A talks to a port on B, and that port is actually nothing more than 3306 on C? Can I do this with an SSH tunnel? Can anyone please give precise instructions? ssh with something like... ssh -lroot -L3306:C:3306 B Watch out for other instances of mysql on A or B... Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: MySQLdb + SSH Tunnel
In message , Emile van Sebille wrote: > ssh with something like... > > ssh -lroot -L3306:C:3306 B > > Watch out for other instances of mysql on A or B... You can use a non-default local port and specify that in your local connection parameters. Similarly you can tell the remote server to use a non-default port in its /etc/my.cnf. -- http://mail.python.org/mailman/listinfo/python-list
Re: MySQLdb + SSH Tunnel
Got it working. Thanks for your help 1) login to B 2) setup a tunnel in the shell machine-B> ssh -L B_ip_address:B_port:C_ip_address:C_port u...@c_ip_address for example: machine-B has ip 1.1.1.1 machine-C has ip 2.2.2.2 then I would type: machine-B> ssh -L 1.1.1.1:3307:2.2.2.2:3306 u...@2.2.2.2 now the code that is running on machine-A would use MySQLdb in the following way import MySQLdb connection = MySQLdb.connect (user='myname',passwd='mypass',db='mydb',host='1.1.1.1',port=3307) NOTE: the port is an integer, NOT a string On Jul 12, 9:18 pm, Riley Crane wrote: > OVERVIEW: > I am running a script on one machine that connects to a MySQL database > on another machine that is outside of our university's domain. > According to the administrator, network policies do not allow the > compute nodes to access machines outside of our university's domain. > > COMPUTERS: > A = compute node within university (I do not have shell access) > B = 2nd machine within university that does not block outside > connections (I have root access) > C = machine outside of university (I have root access) > mysqldb on A cannot connect to C but. > mysqldb on A can connect to B > > WHAT I WOULD LIKE TO DO: > Is it possible to set something up where A talks to a port on B, and > that port is actually nothing more than 3306 on C? Can I do this with > an SSH tunnel? > > Can anyone please give precise instructions? -- http://mail.python.org/mailman/listinfo/python-list
Re: MySQLdb + SSH Tunnel
Got it working. Thanks for your help! 1) login to B 2) setup a tunnel in the shell machine-B> ssh -L B_ip_address:B_port:C_ip_address:C_port u...@c_ip_address for example: machine-B has ip 1.1.1.1 machine-C has ip 2.2.2.2 then I would type: machine-B> ssh -L 1.1.1.1:3307:2.2.2.2:3306 u...@2.2.2.2 now the code that is running on machine-A would use MySQLdb in the following way import MySQLdb connection = MySQLdb.connect (user='myname',passwd='mypass',db='mydb',host='1.1.1.1',port=3307) NOTE: the port is an integer, NOT a string On Jul 12, 9:18 pm, Riley Crane wrote: > OVERVIEW: > I am running a script on one machine that connects to a MySQL database > on another machine that is outside of our university's domain. > According to the administrator, network policies do not allow the > compute nodes to access machines outside of our university's domain. > > COMPUTERS: > A = compute node within university (I do not have shell access) > B = 2nd machine within university that does not block outside > connections (I have root access) > C = machine outside of university (I have root access) > mysqldb on A cannot connect to C but. > mysqldb on A can connect to B > > WHAT I WOULD LIKE TO DO: > Is it possible to set something up where A talks to a port on B, and > that port is actually nothing more than 3306 on C? Can I do this with > an SSH tunnel? > > Can anyone please give precise instructions? -- http://mail.python.org/mailman/listinfo/python-list
