Hello,

I'm wondering if someone could help me with an issue i'm having.
I can log in to an remote host via ssh. I want to run an program on this host that requires an xserver to run. I would this program to use the xserver that's running on my localhost.
So I did the following: I set the 'DISPLAY' enviroment variable on the remote host to the ipadress of the localhost; . After that I ran 'xhost' on my local machine: where 'ww.xx.yy.zz' is the IP adress of the remote host.
But after this, I still can't display stuff on my local machine because the firewall is blocking the connection. I tried turing the firewall of, and after that I can display the program on my local machine. But needless to say that is not exactly an elegant and desirable solution.
So how do I set things up so that I can get an connection through the firewall? I read something about the 'xfwp' program on the net, but after reading the man page of this program, it's apperent that I really need help from someone to set things up.

Peace dudes.....

Your eternal

It depends...Do you want to run separate programs or the whole X session on another machine?

Hi,

Just one program...

First of all your Xserver depending on its distribution comes shipped with some sort of command line switches when it loads, as of FC3 the Xserver port is closed by default in GDM configuration with the --nolisten switch, your xserver is by default not running a LISTEN port on your local machine..

you can check to see your X command line switch by running
ps aux | grep X

something like this is rendered in FC3 by default
"/usr/X11R6/bin/X :0 -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7"

if this is the case you must first edit your
/etc/X11/gdm/gdm.conf"

to comment out the "nolisten" directive.. then Restart X if this is the case

Second verify that it is now listening , default is port 6000
netstat -an | grep X
nmap localhost

if either renders you port 6000 LISTEN / OPEN your now ready to recieve connections, you must then allow your firewall to allow connections to port 6000 tcp

iptables -A INPUT -m tcp -p tcp --dport 6000 -m state --state NEW -s ALLOWEDIPADDRESS -j ACCEPT

Dude, thanks very much! it worked!!!!

I guess FC4 is a little different. I had to to the following.

I had to edit /etc/X11/gdm/gdm.conf and do the following.

Uncomment this line.
#DisallowTCP=true

Expressly set the parameter to false.
DisallowTCP=false.


At that point you can either reboot or restart X11 processes.

Thanks again!