Peter Crowther wrote:
From: André Warnier [mailto:a...@ice-sa.com]
Christopher Schultz wrote:
What about forwarding X through the tunnel instead?
You can't, because it is variable. It is the result of some internal
"negotiation" between Jconsole and the remote JVM.
Apparently, anyway. I haven't managed to make it work so far.
To expand Chris' suggestion: What about forwarding the X11 protocol through the
tunnel instead, such that you can run Jconsole on the same machine as the JVM?
X11 has a fixed port number, and ssh has support for this. I've used this
trick when needing to do something graphical on a box with ssh-only access;
works a treat.
Sorry to be so obtuse. "X" is not something I use regularly, so when
Chris mentioned X, I thought he was talking about the secondary
connection/port that the JVM/Jconsole agree on, not about X-terminal and so.
So thanks for the tip, but could you expand even more ?
I realise this isn't really a Tomcat matter, but maybe this can help
someone else in a similar situation.
At which level would X11 kick in ?
Layout is as follows :
Office A :
workstation (me) --> firewall/router -> internet modem --> internet
Office B :
internet -> internet modem -> firewall/router -> Tomcat host
There is no VPN setup between A and B.
My workstation is a Windows laptop. I don't presently have an X emulator
on it. It has Java JDK 6, an SSH terminal-like program (putty), WinSCP,
etc.. I'd rather avoid installing Cygwin on the laptop, because it
interferes with other Unix-like things I have on it.
The Tomcat host has a fixed internal IP address.
I could also fix the internal IP address of my workstation.
I have full control of the routers/firewalls/hosts.
The firewall/router at B automatically tunnels ports 22,80,8080 and some
others to the Tomcat host. I can add more tunnels.
I can also build on-demand tunnels from outside to any inside host/port
via the firewall and SSH. Doing something in the other direction is
more tricky , because both Office A and B have variable internet IP
addresses which change once per 24h (both with dynamic DNS though).
I'm usually at A. B is my "home office", and when my laptop is there, I
have no problem running JConsole on it and connecting to the Tomcat
host, because both are then on the same LAN. But I haven't managed that
yet from A.
?
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