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Old 10-29-2013, 06:43 AM   #1
unclesamcrazy
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Not able to access display of clearOS on ubuntu using ssh -X


I am using ubuntu.
I have a clearOS server too.
I want to access display of clearos on my ubuntu.
openssh-server and openssh-client has been installed on clearos and ubuntu both.

I am using following command on my ubuntu terminal to connect with clearos.

Code:
# ssh -X 192.168.0.9
Now I am connected to clearos server but it shows following error line after connection.
Code:
X11 forwarding request failed on channel 0
I can access complete server on terminal. I am able to open and edit any file. I can do everything what is possible on terminal but I am not able to open display.
It shows following error.
Code:
Error: no display specified
How can I specify display on clearos?
Please help.
 
Old 10-29-2013, 07:16 AM   #2
pan64
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have you checked this: http://www.ssh.com/manuals/server-ad...orwarding.html ?
 
Old 10-29-2013, 07:54 AM   #3
eklavya
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Is there .Xauthority file in your clearos?
 
Old 10-29-2013, 07:59 AM   #4
unclesamcrazy
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@pan64 - The setting is for client and I think my client setting is fine because I can connect other systems of same LAN as well as I can open their display on my Ubuntu.

@eklavya - No there is no .Xauthority file on clearOS.

How to create it, please suggest.
 
Old 10-29-2013, 08:20 AM   #5
pan64
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X11Forwarding is a server side setting, by default it is set to "no". You need to enable it. see man sshd_config.
 
Old 10-30-2013, 03:52 AM   #6
unclesamcrazy
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No it is not working either. This /etc/ssh/sshd_config of clearos.
Code:
#	$OpenBSD: sshd_config,v 1.80 2008/07/02 02:24:18 djm Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options change a
# default value.

Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2

# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024

# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
SyslogFacility AUTHPRIV
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile	.ssh/authorized_keys
#AuthorizedKeysCommand none
#AuthorizedKeysCommandRunAs nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no
PasswordAuthentication yes

# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes
ChallengeResponseAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
#KerberosUseKuserok yes

# GSSAPI options
#GSSAPIAuthentication no
GSSAPIAuthentication yes
#GSSAPICleanupCredentials yes
GSSAPICleanupCredentials yes
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no
UsePAM yes

# Accept locale-related environment variables
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS

AllowAgentForwarding yes
AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#ShowPatchLevel no
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
#PermitTunnel no
#ChrootDirectory none

# no default banner path
#Banner none

# override default of no subsystems
Subsystem	sftp	/usr/libexec/openssh/sftp-server

# Example of overriding settings on a per-user basis
#Match User anoncvs
	X11Forwarding yes
#	AllowTcpForwarding no
#	ForceCommand cvs server
X11UseLocalhost no
I have restarted the ssh service of clearos.
 
Old 10-30-2013, 04:18 AM   #7
pan64
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you need to look at the logs (increase log level) to catch it
 
  


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