Re: port forwarding

From: Robert Hajime Lanning (
Date: 12/03/04

  • Next message: Andrew Afliatunov: "Can't login"
    Date: Thu, 2 Dec 2004 16:27:53 -0800

    no, he has the direction right.

    "l" has direct access to "w" (database). "r" is remote somewhere with
    the client

    He is on "l", ssh'ing to "r" to run the client utilities on "r", that
    need the tunnel
    back to "l", so it can talk to "w".

    I think his issue maybe that the client utilities are trying to
    connect to a well
    known port (1521), while he has ssh listening on 11523.

    On Thu, 2 Dec 2004 14:42:53 -0500 (EST), <> wrote:
    > > I want to access the database on w from r. There is no direct connection
    > > between w and r. I only have a ssh tunnel from r to l.
    > > To establish the connection, I startet a ssh connection to r on l and
    > > forward port 11523 on r to port 1521 on w:
    > >
    > > ssh -v r -R 11523:w:1521 -g -N
    > >
    > > Trying to use the oracle tools on r, I cannot get the connection to w.
    > > But it should work. :-)
    > -R vs. -L determines which "end" is forwarded. -L forwards connections to
    > ports on the local machine, transforming them into connections to what you
    > specify in the forward.
    > If I understand correctly, what you want to do is:
    > ssh -v r -L 11523:w:1521 -g -N
    > and then point your oracle tools to localhost as the database.


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