Hi MAL and folks,

Because of SSH being unstable in operation I upgraded it to the latest packages on RH9 box as follows;
openssh-3.7.1p2-1.i386.rpm openssh-clients-3.7.1p2-1.i386.rpm
openssh-askpass-3.7.1p2-1.i386.rpm
openssh-askpass-gnome-3.7.1p2-1.i386.rpm openssh-server-3.7.1p2-1.i386.rpm



After upgrade


On Gentoo box
===========
As USER ***

$ ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
-bash-2.05b$ konqueror
konqueror: cannot connect to X server

$ ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Last login: Tue Nov 11 19:08:15 2003 from 192.168.0.2
[EMAIL PROTECTED] root]# konqueror
konqueror: cannot connect to X server


As ROOT ***


# xhost + 192.168.0.1
xhost:  unable to open display ""

# ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Warning: No xauth data; using fake authentication data for X11 forwarding.
-bash-2.05b$

# ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Warning: No xauth data; using fake authentication data for X11 forwarding.
Last login: Tue Nov 11 19:37:02 2003 from 192.168.0.2



On RH9 box
=========
As USER ***

$ ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Last login: Tue Nov 11 18:43:19 2003
[EMAIL PROTECTED] satimis $ konqueror
kbuildsycoca running...
DirFilterPlugin: New URL    : file:/home/satimis
DirFilterPlugin: Current URL:
ASSERT: "m_widget" in kaction.cpp (2993)
ASSERT: "m_widget" in kaction.cpp (2993)

Connect to X-server of RH9 box without problem

$ ssh -X [EMAIL PROTECTED]
also no problem


As ROOT *** # ssh -X [EMAIL PROTECTED] Permission denied (publickey,password,keyboard-interactive). Could not login/connect X server of Gentoo box

# ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Last login: Tue Nov 11 18:53:51 2003 from 192.168.0.1
localhost root # konqueror
kbuildsycoca running...
DirFilterPlugin: New URL    : file:/root
DirFilterPlugin: Current URL:
DirFilterPlugin: New URL    : file:/
DirFilterPlugin: Current URL: file:/root
ASSERT: "m_widget" in kaction.cpp (2993)
ASSERT: "m_widget" in kaction.cpp (2993)
Connect to X-server of Gentoo box

I tried more than an hour to find out the cause of this funny things without result including rebooting PCs

/etc/ssh/sshd_config
Host *
      ForwardX11=yes

found on both boxes. Also tried adding "ForwardAgent=yes"

Remark:
On Gentoo box - iptables not running
On RH9 box - iptables stopped running only  Shorewall running

B.R.
Stephen


Stephen Liu wrote:

I will try your suggestion when the problem comes again. This time it works perfect.


Without -X, the remote machine is connecting to the local machine's IP, and conversing with the X server via it's own TCP connection. If a firewall is in the way, this won't work.

With -X, all X data is sent via the already existing SSH connection (the same connection you type commands via), and so will work even if all other ports are blocked.

MAL




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