Hi all,

Well I have googled and searched tons of posts here and on other forums and cannot find any help to my problem...

I have 2 computers that I want to get X11 forwarding over

one is my server 192.168.0.1 running Redhat 9

the other is my main work computer 192.168.0.101 running Gentoo

I want to run the ethereal program that resides on my server, on the screen of my gentoo machine.

I have tried everything I can think of.

I have checked the /etc/ssh/sshd_config file so that X11 forwarding is enabled. My firewall specifically allows connections on port 6000 from local machines.

(/sbin/iptables -A INPUT -s 0/0 -p tcp --destination-port 6000 -j DROP
/sbin/iptables -A INPUT -s 0/0 -p udp --destination-port 6000 -j DROP
/sbin/iptables -I INPUT -s 192.168.0.0/24 -p tcp --destination-port 6000 -j ACCEPT
/sbin/iptables -I INPUT -s 192.168.0.0/24 -p udp --destination-port 6000 -j ACCEPT)

Everytime I try to connect from my gentoo machine I get the following error:

#ssh -X -l root 192.168.0.1

password: ******

root@192.168.0.1# ethereal &
[1] 3243
Gtk-WARNING **: cannot open display: localhost:11.0


I tried to change the DISPLAY variable on the server but every time I do it, by;

#csh

#setenv DISPLAY 192.168.0.1:11.0

it stays until I exit out of csh, so if in bash I type #env the DISPLAY variable always shows as DISPLAY localhost:11.0

I am really stumped on this one.... No one elese seems to be having this particular problem???

Does anyone have any ideas?

Lucas

first of all...stop the firewall and try just to make sure its not the firewall.
But after that I really don't know what to tell you. I have never had any problems with this.

One thing you could do is just run VNC. google it if you dont know what im talking about.

sorry i couldnt be more help.

Thankyou for your reply, I did try turning the firewall off altogether but it still had the same error:

Gtk-WARNING **: cannot open display: localhost:11.0

Shouldnt "localhost:11.0" be "192.168.0.1:11.0" ??

VNC looks interesting, might look into it in the future, but for now I would rather figure out why ssh X11 forwarding is not working.

would it matter that the server is using openssh-3.5, and the client is using openssh-3.8?

I managed to get X11 forwarding working from gentoo to gentoo but still not from redhat 9.

I am starting to really think it has something to do with the env DISPLAY variable, but I cannot figure out how to change it in REDHAT 9!!

I managed to X11 forward over ssh by following exactly this post (I did it on Slack 10). It tells you how to take care automagically of the DISPLAY variable

http://wiki.linuxquestions.org/wiki/...Forwarding_X11

Hope it helps.

Thanks but still no luck, I am really stumped on this one. But not to worry just increases my love for Gentoo... one day I will convert my server away from Redhat 9 to Gentoo, and then I wont have these unexplainable problems.

You do know that you can run other tcpdump programs in the console right? I beleive you can even run ethereal in console mode. I havent made use of it in console mode yet. Just type tethereal at a console, I dont remember all the options though. Another thing too, do you have the DISPLAY variable setup right in your /.ssh/config? I think your machine is still trying to open ethereal on your localhost display.

I get that sometimes when I am on screen two/3/4under a wm. Try screen 1
or export DISPLAY your compi adress 0:0. of course receiving compi has to have X or exceed or so and you have to set xhost

Check for, and remove the TCP NOLISTEN statement in .xserverrc of the machine you SSH too (if that statement exists.)

As Dr Neil said previously, try the following:

ssh as a user to the server without running any extra paramters, then run:

export DISPLAY=192.168.0.101:0.0
ethereal &

See what happens. Hopefully it should work.

of course your ssh client has to have X11 forwarding switched on i.e. putty