03-22-2016
Force SSH session without/disabling X11 forwarding.
I would like to disable X11 session forcefully. I have tried the following things:
1. Setting appropriate DISPLAY variable in the /etc/environment file to be "0.0"
2. I have tried setting the sshd_config parameter X11Forwarding to be "no"
This session communication is happening by exchanging private file "id_rsa" so as to gain password-less communication between client and server.
What config changes would I be required to do on server and client side?
NOTE: Using Ubuntu 14.04 AMI's on AWS for the above case.
10 More Discussions You Might Find Interesting
1. OS X (Apple)
Hi,
I have issues with running graphical interfaces on my computer being remotely logged into a network via the -X option of ssh. My .cshrc shows DISPLAY=hostname:0 and I think there should be a different number instead of the 0. I changed the ssh_config file already to 'X11 forwarding yes', which... (0 Replies)
Discussion started by: ginese
0 Replies
2. Debian
I have 2 Debian boxes.
In my ssh.com client and my putty client, I have X11 fowarding turned
on for both boxes.
When I connect one, I can xterm with no problem back to my pc.
On the other, I keep getting:
xterm Xt error: Can't open display:
xterm: DISPLAY is not set
On both... (3 Replies)
Discussion started by: natter
3 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I am using Putty, enabled SSH X11 forwarding and entered the X11 display location as "localhost:0". However I encountered the following error:
------------------------------------
# xclock &
2941
# X connection to localhost:10.0 broken (explicit kill or server shutdown).
+ Exit 1... (4 Replies)
Discussion started by: panggou
4 Replies
4. Red Hat
X11 forwarding problem between 2 RHEL4 machines with SSH
Already configured the following on both machines under /etc/ssh
Under sshd_config:
UsePAM no
AllowTcpForwarding yes
Under ssh_config:
ForwardAgent yes
ForwardX11 yes
ForwardX11Trusted yes
-----------------------------
Using... (1 Reply)
Discussion started by: panggou
1 Replies
5. Cybersecurity
Hi,
from my workplace we use a proxy to connect to the outside world, including external ssh servers.
The problem is that the server is seeing the connection coming from the proxy and knows nothing about the client behind it. The ssh connection itself works fine, but x-forwarding does not work as... (1 Reply)
Discussion started by: vampirodolce
1 Replies
6. UNIX for Dummies Questions & Answers
Hi all
I'm having an issue with X11 Forwarding
I have a VM set up on my computer which I usually "ssh -X" to over a home network (192.168.1.*).
Client 192.168.1.100
Server 192.168.1.103
This worked perfectly fine for X11 forwarding.
However I am not at home now (and have no access to... (2 Replies)
Discussion started by: grahambo2005
2 Replies
7. UNIX for Dummies Questions & Answers
Hello. I installed a Debian box, and its installed remotely. I need to boot up iceweasel from there to do a quick test.
I log on using:
ssh root@<IP> -X
I have modified the /etc/ssh/sshd_config file, and added the X11Forwarding yes flag
And yet I still get:
Error: cannot open... (10 Replies)
Discussion started by: dynelight
10 Replies
8. Red Hat
Is it possible to launch an X11 application and have it use an X11 server on the other side of a bastion host? Specifically, here's my setup:
my laptop ------------- bastion -------------- remote host
I have putty installed on my laptop. The bastion is rhel 6.5 and the remote host is... (1 Reply)
Discussion started by: tsreyb
1 Replies
9. UNIX for Beginners Questions & Answers
Unable to get X11 activated on my login even after Unix admin has enabled it (2 Replies)
Discussion started by: tomsayer1977
2 Replies
10. Red Hat
hi,
I'm trying to run a bash script that starts GUI. Though it says application started when I run this bash script doesn't show up any GUI. Here is what I've tried so far and please let me know if I'm missing something with the X11 set up here.
cat /etc/redhat-release
Red Hat Enterprise... (8 Replies)
Discussion started by: fop4658
8 Replies
LEARN ABOUT MOJAVE
startx
STARTX(1) General Commands Manual STARTX(1)
NAME
startx - initialize an X session
SYNOPSIS
startx [ [ client ] options ... ] [ -- [ server ] [ display ] options ... ]
DESCRIPTION
The startx script is a front end to xinit(1) that provides a somewhat nicer user interface for running a single session of the X Window
System. It is often run with no arguments.
Arguments immediately following the startx command are used to start a client in the same manner as xinit(1). The special argument '--'
marks the end of client arguments and the beginning of server options. It may be convenient to specify server options with startx to
change on a per-session basis the default color depth, the server's notion of the number of dots-per-inch the display device presents, or
take advantage of a different server layout, as permitted by the Xorg(1) server and specified in the xorg.conf(5) configuration. Some
examples of specifying server arguments follow; consult the manual page for your X server to determine which arguments are legal.
startx -- -depth 16
startx -- -dpi 100
startx -- -layout Multihead
To determine the client to run, startx first looks for a file called .xinitrc in the user's home directory. If that is not found, it uses
the file xinitrc in the xinit library directory. If command line client options are given, they override this behavior and revert to the
xinit(1) behavior. To determine the server to run, startx first looks for a file called .xserverrc in the user's home directory. If that
is not found, it uses the file xserverrc in the xinit library directory. If command line server options are given, they override this
behavior and revert to the xinit(1) behavior. Users rarely need to provide a .xserverrc file. See the xinit(1) manual page for more
details on the arguments.
The system-wide xinitrc and xserverrc files are found in the /etc/X11/xinit directory.
ENVIRONMENT VARIABLES
DISPLAY This variable gets set to the name of the display to which clients should connect. Note that this gets set, not
read.
XAUTHORITY This variable, if not already defined, gets set to $(HOME)/.Xauthority. This is to prevent the X server, if not
given the -auth argument, from automatically setting up insecure host-based authentication for the local host.
See the Xserver(1) and Xsecurity(7) manual pages for more information on X client/server authentication.
FILES
$(HOME)/.xinitrc Client to run. Typically a shell script which runs many programs in the background.
$(HOME)/.xserverrc Server to run. The default is X.
/etc/X11/xinit/xinitrc Client to run if the user has no .xinitrc file.
/etc/X11/xinit/xserverrc Server to run if the user has no .xserverrc file.
SEE ALSO
xinit(1), X(7), Xserver(1), Xorg(1), xorg.conf(5)
X Version 11 xinit 1.3.2 STARTX(1)