Válasz: Re: connect behind from firewall

[szerdahelyi dot mihaly at ln dot matav dot hu]

Harold,
you are the boss and I am only a stupid Hungarian project manager who has a
special mainly private problem and my two programmers and me fight with
this more than two weeks without any result :(
We have read your documentation and tried the telnet and SSH solution but
none of them worked... - the screen is grey, the program runs and no
answer... - :(, on monday when I am going to go back to my workplace I will
control the experience again then I will return to the problem if you don't
mind.
We need the non-profit solution so we tried xweird and vnc (java) also, but
they did not work also... we downloaded and partly examine (in paper) the
WinAxe and Xmanager but don't want to change our mind if we have hope for
the free solution. By the way, the vnc(java) solution works from remote
server to client but back not. My router is opened to the ssh.
Perhaps we failed something but we don't know what...
Thanks
Michael





Harold L Hunt II <huntharo@msu.edu>@cygwin.com dátum: 2003.05.01 22:38:53

Kérem, válaszoljon Címzett cygwin-xfree@cygwin.com

Feladó:     cygwin-xfree-owner@cygwin.com


Címzett:          cygwin-xfree@cygwin.com
Másolat:
Tárgy:      Re: connect behind from firewall


Michael,

Are you connecting via the -query command-line parameter to
Cygwin/XFree86?  If so, XDMCP does not work when your XDM host is behind
a firewall.  I am not sure if you can easily open the ports on the
firewall or not.  In any case, the topic of XDMCP to hosts behind
firewalls is one that is general to all X Servers and there should be
lots of information about that on the web (search www.google.com).

If, on the other hand, you are using telnet to display applications
running on the remote host, then all you need to do is instead use ssh
with X11 tunnelling.  This is described for Cygwin/XFree86 in the User's
Guide:

http://xfree86.cygwin.com/docs/ug/


This will require that you have the openssh package for Cygwin and that
your Linux machine have openssh installed and the sshd daemon running.
You will also need to have port 22 forwarded by the firewall to the
Linux host.  You could also alternatively forward another port (for
example, 2200) to port 22 on the Linux host if you already use port 22
on the firewall.


Hmm... in fact, X tunnelling over ssh is also general to all X Servers
with lots of information on the web.  Again, search www.google.com for
more information.

Harold

szerdahelyi.mihaly@ln.matav.hu wrote:
> Hi,
> we would like to connect Win2k to Linux with cygwin; it works without
> problems when both machines are behind a company firewall but it does not
> work on this line: Win2k->comp.firewall->net->private router->private
Linux
> server(same as in the first example). Unfortunately (but it is maybe
good)
> we have not enough information about the firewall because of the policy.
We
> can configure the end-machines and the private router. We could not find
> any ideas in FAQ's. Have you any idea what could we continue with?
> I send it in different mode because of the slightly confidential
> information.
> Thanks
> Michael Szerdahelyi