[CentOS] ssh X11 forwarding not working

Wed Oct 10 03:36:39 UTC 2007
Barry Schiffman <schiffo2000 at yahoo.com>

--- Barry Schiffman <schiffo2000 at yahoo.com> wrote:

> 
> --- Feizhou <feizhou at graffiti.net> wrote:
> 
> > James A. Peltier wrote:
> > > I'm having problems with ssh.com and X11
> > forwarding
> > > 
> > > ssh: SSH Secure Shell 3.2.0 (non-commercial
> > version) on i686-pc-linux-gnu
> > > 
> > > I am in the process of testing some of my
> machines
> > with CentOS 5 
> > > x86/x86_64 and have run into a bit of a snag. 
> X11
> > Forwarding is not 
> > > working.
> > > 
> > > Any hints?  I've checked the ssh config files
> and
> > they seem to be 
> > > identical to the config files on our existing
> SuSE
> > 10.0 machines which 
> > > are working.  This is troubling indeed.
> > > 
> > > 
> > 
> > ssh -v and see what the ssh client complains
> about.
> 
> I just installed CentOS 5.0 on one machine here and
> have a similar problem. I haven't changed the config
> file from what was installed, and it looks pretty
> much
> like the config in CentOS 4.5. 
> 
> I've got openssh-4.3p2-16.el5 on the CentOS 5.0
> machine, and have tried to get X11 forwarding
> working
> on connections from three machines with different
> os's
> -- centos 4.5, ubuntu and Mac OS. 
> 
> ssh -v doesn't seem to say anything out of the
> ordinary. After authentication, it says:
> 
> Entering interactive session.
> Requesting X11 forwarding with authentication
> spoofing.
> 
> Trying to open an emacs window without a -d
> argument,
> I get a message about no address for localhost:6010.
> 
> Supplying the -d argument, I get 
> Xlib: connection to "xxx:0" refused by server
> Xlib: No protocol specified.
> 
> Barry
> 

I should've tried this before writing. If I set the
environment variable DISPLAY in the xterm after making
the ssh connection, it works. 




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