ssh X11 forwarding not working on FreeBSD 6.2
Terry Todd
tlt at badger.tltodd.com
Tue Jul 24 17:24:27 UTC 2007
On Tue, Jul 24, 2007 at 09:48:05AM -0700, Michael S. Eubanks wrote:
...
> Start by changing the following line from
>
> X11DisplayOffset 10
>
> to
>
> X11DisplayOffset 1
...
OK, I tried that. No difference.
Here's what heppened on the FreeBSD 6.2 system:
$
$ echo $DISPLAY
localhost:1.0
$
$ xhost
Xlib: connection to "localhost:1.0" refused by server
Xlib: PuTTY X11 proxy: wrong authentication protocol attempted
xhost: unable to open display "localhost:1.0"
$
$ xhost +
Xlib: connection to "localhost:1.0" refused by server
Xlib: PuTTY X11 proxy: wrong authentication protocol attempted
xhost: unable to open display "localhost:1.0"
$ xterm
Xlib: connection to "localhost:1.0" refused by server
Xlib: PuTTY X11 proxy: wrong authentication protocol attempted
xterm Xt error: Can't open display: localhost:1.0
$
Here's what happens on the FC6 system:
$ echo $DISPLAY
localhost:13.0
$
$ xhost
access control disabled, clients can connect from any host
INET:terry-pc.egizone.com
LOCAL:
$
Terry Todd
On Tue, Jul 24, 2007 at 09:48:05AM -0700, Michael S. Eubanks wrote:
> On Tue, 2007-07-24 at 10:59 -0500, Terry Todd wrote:
> > I have installed Xming successfully on a Windows XP system.
> > It works OK to a FC6 system and an older UNIXware system.
> >
> > However when trying to connect to a FreeBSD 6.2 system with PuTTY
> > ssh it doesn't work. PuTTY has Enable X11 forwarding checked.
> >
> > Here's what I get:
> >
> > $
> > $ xhost
> > Xlib: connection to "localhost:10.0" refused by server
> > Xlib: PuTTY X11 proxy: wrong authentication protocol attempted
> > xhost: unable to open display "localhost:10.0"
> > $
> >
> > What can be wrong?
> >
> > I have ssh configured as follows:
> > # grep X11 /etc/ssh/*
> > /etc/ssh/ssh_config:ForwardX11 yes
> > /etc/ssh/ssh_config:ForwardX11Trusted yes
> > /etc/ssh/sshd_config:X11Forwarding yes
> > /etc/ssh/sshd_config:X11DisplayOffset 10
> > /etc/ssh/sshd_config:X11UseLocalhost yes
> >
>
> Start by changing the following line from
>
> X11DisplayOffset 10
>
> to
>
> X11DisplayOffset 1
>
> According to the sshd_conf man page, looks like the number should be set
> to the display that you want to forward (the first available display).
>
>
> > Here is the Xming log file:
> > Welcome to the Xming X Server
> > Vendor: Colin Harrison
> > Release: 6.9.0.24
> > FreeType2: 2.3.0
> > Contact: http://sourceforge.net/forum/?group_id=156984
> >
> > C:\Program Files\Xming\Xming.exe :0 -ac -clipboard -multiwindow
> >
> > XdmcpRegisterConnection: newAddress x.x.x.x
> > winPrefsLoadPreferences: C:\Program Files\Xming\Xmingrc
> > LoadPreferences: Done parsing the configuration file...
> > winAdjustVideoModeShadowGDI - Using Windows display depth of 32 bits per pixel
> > winAllocateFBShadowGDI - Creating DIB with width: 1600 height: 1200 depth: 32
> > winInitVisualsShadowGDI - Masks 00ff0000 0000ff00 000000ff BPRGB 8 d 24 bpp 32
> > glWinInitVisuals:1511: glWinInitVisuals
> > init_visuals:1055: init_visuals
> > null screen fn ReparentWindow
> > null screen fn RestackWindow
> > InitQueue - Calling pthread_mutex_init
> > InitQueue - pthread_mutex_init returned
> > InitQueue - Calling pthread_cond_init
> > InitQueue - pthread_cond_init returned
> > winInitMultiWindowWM - Hello
> > winInitMultiWindowWM - Calling pthread_mutex_lock ()
> > winMultiWindowXMsgProc - Hello
> > winMultiWindowXMsgProc - Calling pthread_mutex_lock ()
> > glWinScreenProbe:1390: glWinScreenProbe
> > fixup_visuals:1303: fixup_visuals
> > init_screen_visuals:1336: init_screen_visuals
> > (--) 5 mouse buttons found
> > (--) Setting autorepeat to delay=500, rate=31
> > (--) winConfigKeyboard - Layout: "00000409" (00000409)
> > (--) Using preset keyboard for "English (USA)" (409), type "4"
> > Could not init font path element C:\Program Files\Xming/fonts/misc/, removing from list!
> > Could not init font path element C:\Program Files\Xming/fonts/TTF/, removing from list!
> > Could not init font path element C:\Program Files\Xming/fonts/Type1/, removing from list!
> > Could not init font path element C:\Program Files\Xming/fonts/75dpi/, removing from list!
> > Could not init font path element C:\Program Files\Xming/fonts/100dpi/, removing from list!
> > Could not init font path element C:\Program Files\Xming\fonts\dejavu, removing from list!
> > Could not init font path element C:\Program Files\Xming\fonts\cyrillic, removing from list!
> > Could not init font path element C:\WINDOWS\Fonts, removing from list!
> > winInitMultiWindowWM - pthread_mutex_lock () returned.
> > winInitMultiWindowWM - pthread_mutex_unlock () returned.
> > winMultiWindowXMsgProc - pthread_mutex_lock () returned.
> > winInitMultiWindowWM - DISPLAY=127.0.0.1:0.0
> > winMultiWindowXMsgProc - pthread_mutex_unlock () returned.
> > winMultiWindowXMsgProc - DISPLAY=127.0.0.1:0.0
> > winProcEstablishConnection - Hello
> > winInitClipboard ()
> > winProcEstablishConnection - winInitClipboard returned.
> > winInitMultiWindowWM - XOpenDisplay () returned and successfully opened the display.
> > winClipboardProc - Hello
> > DetectUnicodeSupport - Windows XP
> > winClipboardProc - DISPLAY=127.0.0.1:0.0
> > winMultiWindowXMsgProc - XOpenDisplay () returned and successfully opened the display.
> > winClipboardProc - XOpenDisplay () returned and successfully opened the display.
> >
> >
> > Here is the PuTTY event log:
> > 2007-07-24 09:53:57 Looking up host "x.x.x.x"
> > 2007-07-24 09:53:57 Connecting to x.x.x.x port 22
> > 2007-07-24 09:53:57 Server version: SSH-2.0-OpenSSH_4.5p1 FreeBSD-20061110
> > 2007-07-24 09:53:57 We claim version: SSH-2.0-PuTTY_Snapshot_2005_05_03:r5737
> > 2007-07-24 09:53:57 Using SSH protocol version 2
> > 2007-07-24 09:53:57 Doing Diffie-Hellman group exchange
> > 2007-07-24 09:53:57 Doing Diffie-Hellman key exchange
> > 2007-07-24 09:53:57 Host key fingerprint is:
> > 2007-07-24 09:53:57 ssh-dss 1024 06:2a:c4:9c:e7:6a:f8:0d:5a:17:e9:b0:e3:79:1c:a5
> > 2007-07-24 09:53:57 Initialised AES-256 SDCTR client->server encryption
> > 2007-07-24 09:53:57 Initialised HMAC-SHA1 client->server MAC algorithm
> > 2007-07-24 09:53:57 Initialised AES-256 SDCTR server->client encryption
> > 2007-07-24 09:53:57 Initialised HMAC-SHA1 server->client MAC algorithm
> > 2007-07-24 09:54:06 Access granted
> > 2007-07-24 09:54:06 Opened channel for session
> > 2007-07-24 09:54:06 Requesting X11 forwarding
> > 2007-07-24 09:54:06 X11 forwarding enabled
> > 2007-07-24 09:54:06 Allocated pty (ospeed 38400bps, ispeed 38400bps)
> > 2007-07-24 09:54:06 Started a shell/command
> > 2007-07-24 09:54:17 Received X11 connect request from 127.0.0.1:53737
> > 2007-07-24 09:54:17 Opening X11 forward connection succeeded
> > 2007-07-24 09:54:17 Forwarded X11 connection terminated
> >
>
>
> -Michael S. Eubanks
> mse_software at charter.net
>
>
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