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