[X2Go-User] Connection time out, possibly because of ssh tunnel creation failure

Jakub Urban urban at ipp.cas.cz
Fri Jun 13 15:57:09 CEST 2014


Hello,

I cannot connect any more to an x2go server which used to work before. The
only thing I can think of that's chaned is the kernel version. The server
is a Scientific Linux 6.5 with kernel 3.10.36-1.el6.elrepo.x86_64. x2go is
installed from EPEL (x2goserver-4.0.1.13-4.el6.x86_64). Below are logs from
the server and pyhoca-gui (although the connection does not work from x2go
clients on Windows/Linux either).

Anybody has any idea why this does not work? There is no firewall in
between the machines.

Thanks,
Jakub

pyhoca-gui log:
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for proxy to come up:
0.4s x 1
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG: X2Go control session
parameters for profile myserver:
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     username: myusername
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     key_filename:
dsa2013_private_openssh_nk
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     unique_hostkey_aliases:
False
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     look_for_keys: False
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG: X2Go terminal session
parameters for profile myserver:
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     client_encoding: UTF-8
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     set_session_title: False
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     snd_system: none
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     session_type: desktop
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     server_encoding: UTF-8
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     snd_port: 4713
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     rdp_server:
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     kbtype: auto
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     applications:
['TERMINAL', 'WWWBROWSER', 'MAILCLIENT', 'OFFICE']
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     published_applications:
False
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     link: adsl
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     xdmcp_server: localhost
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     kbvariant: null
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     geometry: 1700x1000
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     rdp_options: -u
X2GO_USER -p X2GO_PASSWORD
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     cmd: GNOME
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     convert_encoding: False
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     kblayout: null
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     session_title:
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     dpi: 110
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     pack: 16m-jpeg-9
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG: X2Go sshproxy parameters
for profile myserver:
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     sshproxy_host:
proxyhost.mydomain
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     sshproxy_port: 22
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     sshproxy_look_for_keys:
True
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     sshproxy_allow_agent:
True
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     sshproxy_key_filename:
pyhoca-gui.exe[2868] (x2gosession-pylib) DEBUG:     sshproxy_user:
pyhoca-gui.exe[2868] (x2gosessregistry-pylib) NOTICE: registering X2Go
session myserver...
pyhoca-gui.exe[2868] (x2gosessregistry-pylib) DEBUG: registering X2Go
session with UUID 3fb8c8de-f2f9-11e3-8dae-eff4f402a373
pyhoca-gui.exe[2868] (x2gocontrolsession-pylib) INFO: executing command on
X2Go server ,,myserver'': sh -c "export HOSTNAME && x2golistsessions"
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 1 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 1
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 2 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 2
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 3 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 3
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 4 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 4
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 5 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 6 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 5
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 7 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 6
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 8 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 7
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 9 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 8
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 10 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 9
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 11 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 12 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 10
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 13 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goguardian-pylib) DEBUG: Entering X2Go Guardian
client management loop...
pyhoca-gui.exe[2868] (x2gocontrolsession-pylib) INFO: executing command on
X2Go server ,,myserver'': sh -c "export HOSTNAME && x2golistsessions"
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 11
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 14 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2gocontrolsession-pylib) INFO: executing command on
X2Go server ,,myserver'': sh -c "export HOSTNAME && x2golistmounts
myusername-50-1402663801_stDGNOME_dp17"
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 12
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 15 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 13
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 16 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 17 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 14
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 18 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 15
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 19 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 16
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) WARN: incoming request to
127.0.0.1:30003 failed on attempt 20 of 20: ChannelException('Connect
failed',)
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 17
pyhoca-gui.exe[2868] (x2gofwtunnel-pylib) ERROR: incoming request to
127.0.0.1:30003 failed after 20 attempts
pyhoca-gui.exe[2868] (PyHoca-GUI) NOTICE: [myserver - session failure]
Forwarding tunnel request to [127.0.0.1]:30003 for session
myusername-50-1402663801_stDGNOME_dp17 was denied by remote X2Go/SSH
server. Session startup failed.
pyhoca-gui.exe[2868] (x2gocontrolsession-pylib) DEBUG: executing command on
X2Go server ,,myserver'': sh -c "echo"
pyhoca-gui.exe[2868] (x2gocontrolsession-pylib) DEBUG: terminating
non-associated session: myusername-50-1402663801_stDGNOME_dp17
pyhoca-gui.exe[2868] (x2gocontrolsession-pylib) DEBUG: executing command on
X2Go server ,,myserver'': sh -c "x2goterminate-session
myusername-50-1402663801_stDGNOME_dp17"
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 18
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 19
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: waiting for port fw tunnel to
come up: 0.5s x 20
pyhoca-gui.exe[2868] (x2goproxy-pylib) ERROR: Bringing up NX3 proxy failed.
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: terminating proxy: <Popen at
0x5366630 pid=3664 returncode=None>
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: Shutting down X2Go proxy
subprocess
pyhoca-gui.exe[2868] (x2goproxy-pylib) WARN: X2Go proxy shutdown gave a
message that we may ignore: [Error 5] Access is denied
pyhoca-gui.exe[2868] (x2goproxy-pylib) DEBUG: Shutting down Paramiko/SSH
forwarding tunnel
pyhoca-gui.exe[2868] (x2goguardian-pylib) DEBUG: Entering X2Go Guardian
client management loop...


/var/log/messages
Jun 13 14:30:18 myserver /usr/bin/x2gofeature: x2gofeature called with
options: X2GO_RUN_EXTENSIONS
Jun 13 14:30:18 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS
Jun 13 14:30:19 myserver /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
myusername-50-1402662605_stDGNOME_dp17 fail-terminate
Jun 13 14:30:21 myserver /usr/bin/x2goumount-session[21341]:
x2goumount-session has been called with options:
myusername-50-1402662605_stDGNOME_dp17
Jun 13 14:49:59 myserver /usr/bin/x2gofeaturelist: x2gofeaturelist called
with options:
Jun 13 14:50:00 myserver /usr/bin/x2gostartagent: x2gostartagent called
with options: 1700x1000 adsl 16m-jpeg-9 unix-kde-depth_17 null auto 1 D
GNOME
Jun 13 14:50:00 myserver /usr/bin/x2gosessionlimit[29965]: x2gosessionlimit
has been called
Jun 13 14:50:01 myserver /usr/bin/x2golistsessions[29968]: x2golistsessions
has been called with options: --all-servers
Jun 13 14:50:03 myserver /usr/bin/x2gofeature: x2gofeature called with
options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:03 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:03 myserver /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
myusername-50-1402663801_stDGNOME_dp17 pre-start
Jun 13 14:50:03 myserver /usr/bin/x2gostartagent: successfully started X2Go
agent session with ID myusername-50-1402663801_stDGNOME_dp17
Jun 13 14:50:03 myserver /usr/bin/x2gofeature: x2gofeature called with
options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:04 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:04 myserver /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
myusername-50-1402663801_stDGNOME_dp17 post-start
Jun 13 14:50:13 myserver /usr/bin/x2goterminate-session:
x2goterminate-session called with options:
myusername-50-1402663801_stDGNOME_dp17
Jun 13 14:50:13 myserver /usr/bin/x2gofeature: x2gofeature called with
options: X2GO_DESKTOPSHARING
Jun 13 14:50:13 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_DESKTOPSHARING
Jun 13 14:50:13 myserver /usr/share/x2go/x2gofeature.d/x2goserver.features:
x2goserver.features called with options: X2GO_DESKTOPSHARING
Jun 13 14:50:13 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-fmbindings.features:
x2goserver-fmbindings.features called with options: X2GO_DESKTOPSHARING
Jun 13 14:50:13 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-xsession.features:
x2goserver-xsession.features called with options: X2GO_DESKTOPSHARING
Jun 13 14:50:13 myserver /usr/bin/x2gofeature: x2gofeature called with
options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:13 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:13 myserver /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
myusername-50-1402663801_stDGNOME_dp17 pre-terminate
Jun 13 14:50:13 myserver /usr/bin/x2goterminate-session: ERROR: failed to
terminate session with ID myusername-50-1402663801_stDGNOME_dp17
Jun 13 14:50:13 myserver /usr/bin/x2gofeature: x2gofeature called with
options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:14 myserver
/usr/share/x2go/x2gofeature.d/x2goserver-extensions.features:
x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS
Jun 13 14:50:14 myserver /usr/bin/x2goserver-run-extensions:
x2goserver-run-extensions called with options:
myusername-50-1402663801_stDGNOME_dp17 fail-terminate
Jun 13 14:50:15 myserver /usr/bin/x2goumount-session[30612]:
x2goumount-session has been called with options:
myusername-50-1402663801_stDGNOME_dp17
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