March 2016 - x2go-user - X2Go ListServ

Re: [X2Go-User] ssh kex error
by is＠k4ts.net 13 Nov '18

13 Nov '18

Am 19.10.2015 17:06, schrieb Robert Dinse: > the new version of openssh disabled certain insecure > ciphers... Version7 is what you mean. I use 6.9 on both client and server. > you can add > the following line to your /etc/ssh/sshd_config manually enable the > insecure old ciphers: > > KexAlgorithms > curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 Adding these ciphers doesn't help - same algo error, Thats wired coz I can ssh to the server without any issues. > -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- > Eskimo North Linux Friendly Internet Access, Shell Accounts, and > Hosting. > Knowledgeable human assistance, not telephone trees or script > readers. > See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) > 246-6874. > > On Mon, 19 Oct 2015, is(a)k4ts.net wrote: > >> Date: Mon, 19 Oct 2015 15:12:43 +0200 >> From: is(a)k4ts.net >> To: x2go-user(a)lists.x2go.org >> Subject: [X2Go-User] ssh kex error >> >> hi, i'm not able to connect >> to my new hardened gentoo server using x2go. >> >> No matter which key type i select for the connection, >> the client (v. 4.0.5.0) terminates with the following: >> >> kex error : no match for method server host key algo: >> server [ssh-rsa,ssh-ed25519], client [ecdsa-sha2-nistp256] >> >> I have rsa and ed25519 keys on my client and server. >> >> sshing from the shell works like always. log is attached. >> >> do you have an idea, whats might wrong? >> >> thx, >> k4t >> >> k4tfish@e10 ~ $ ssh k4tfish@host >> OpenSSH_6.9p1-hpn14v5, OpenSSL 1.0.2d 9 Jul 2015 >> debug1: Reading configuration data /etc/ssh/ssh_config >> debug1: Connecting to host.net port 51822. >> debug1: Connection established. >> debug1: identity file /home/k4tfish/.ssh/id_rsa type 1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_rsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_dsa type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_dsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ecdsa type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ecdsa-cert type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ed25519 type -1 >> debug1: key_load_public: No such file or directory >> debug1: identity file /home/k4tfish/.ssh/id_ed25519-cert type -1 >> debug1: Enabling compatibility mode for protocol 2.0 >> debug1: Local version string SSH-2.0-OpenSSH_6.9p1-hpn14v5 >> debug1: Remote protocol version 2.0, remote software version >> OpenSSH_6.9p1-hpn14v5 >> debug1: match: OpenSSH_6.9p1-hpn14v5 pat OpenSSH* compat 0x04000000 >> debug1: Authenticating to host...net:51822 as 'k4tfish' >> debug1: SSH2_MSG_KEXINIT sent >> debug1: SSH2_MSG_KEXINIT received >> debug1: AUTH STATE IS 0 >> debug1: REQUESTED ENC.NAME is 'chacha20-poly1305(a)openssh.com' >> debug1: kex: server->client chacha20-poly1305(a)openssh.com <implicit> >> none >> debug1: REQUESTED ENC.NAME is 'chacha20-poly1305(a)openssh.com' >> debug1: kex: client->server chacha20-poly1305(a)openssh.com <implicit> >> none >> debug1: expecting SSH2_MSG_KEX_ECDH_REPLY >> debug1: Server host key: ssh-ed25519 SHA256:xyz >> debug1: Host '[host.net]:51822' is known and matches the ED25519 host >> key. >> debug1: Found key in /home/k4tfish/.ssh/known_hosts:203 >> debug1: SSH2_MSG_NEWKEYS sent >> debug1: expecting SSH2_MSG_NEWKEYS >> debug1: SSH2_MSG_NEWKEYS received >> debug1: Roaming not allowed by server >> debug1: SSH2_MSG_SERVICE_REQUEST sent >> debug1: SSH2_MSG_SERVICE_ACCEPT received >> debug1: Authentications that can continue: >> publickey,password,keyboard-interactive >> debug1: Next authentication method: publickey >> debug1: Offering RSA public key: /home/k4tfish/.ssh/id_rsa >> debug1: Server accepts key: pkalg ssh-rsa blen 279 >> debug1: Authentication succeeded (publickey). >> Authenticated to host ([123.123.456.7]:51822). >> debug1: Final hpn_buffer_size = 2097152 >> debug1: HPN Disabled: 0, HPN Buffer Size: 2097152 >> debug1: channel 0: new [client-session] >> debug1: Enabled Dynamic Window Scaling >> debug1: Requesting no-more-sessions(a)openssh.com >> debug1: Entering interactive session. >> debug1: client_input_global_request: rtype hostkeys-00(a)openssh.com >> want_reply 0 >> debug1: Sending environment. >> debug1: Sending env LC_COLLATE = C >> debug1: Sending env LANG = en_US.utf8 >> >> _______________________________________________ >> x2go-user mailing list >> x2go-user(a)lists.x2go.org >> http://lists.x2go.org/listinfo/x2go-user >>

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Logging x2go connections?
by Grigory Shamov 04 May '17

04 May '17

Hi All, This perhaps is a trivial question: but is it possible to somehow log/check history of past x2go session on the server? -- Grigory Shamov Westgrid/ComputeCanada Site Lead University of Manitoba E2-588 EITC Building, (204) 474-9625

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Shared Folders?
by KARL A. WOELFER 25 Jan '17

25 Jan '17

I am not able to get the basic Shared Folder capability to run. Debian 7 Linux OS on client and server, X2go V 4.0.3.0, and XFCE Desktop. Is there something fundamental preventing this from working? Thanks in advance, - KarlW

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Num Lock key in windows agent
by Olivier BILHAUT 24 Nov '16

24 Nov '16

Hi all. First of all, I'd like to congratulate all the contributors for this great work. X2go is a professional class tool for remote desktop. However... I ran into a really special thing using the windows agent in its last version (4.0.5). Sometimes, when you open the session, the "Num Lock" is usable, sometimes not. I mean, sometimes you may push the caps lock button and switch from arrows to Numeric keys, and sometimes the Key Pad is fully unusable. It happens only on windows agent as far as I know. All that I tried did not solve the issue. Did you already encounter that? Thanks. -- OB SySAdmin Fondation Hospitalière de la Miséricorde

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x2goclient session icons not working
by Will Wagner 23 Nov '16

23 Nov '16

Hello, I have upgraded to 4.0.4.0 on win32. It's a minor thing but if I now set a session icon for a connection it is not displayed and I get blank instead. Is there something I need to do to get this to work? Thanks Will

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X2Go Two-factor-authentication with SecurID
by swizz ly 23 Nov '16

23 Nov '16

5 16

Video
by Orion Poplawski 30 Mar '16

30 Mar '16

I'm having a lot of trouble getting a gstreamer based video player to work under X2Go. First off it looks like Xv is not supported. Is that something that ever will be? Next thing I'm seeing with the parole player is that the video frame goes black when I pause it. I'm also trying to use the fluendo gstreamer codecs and seeing segfaults (apparently in the fluendo code) when using dragon player to watch videos. I'm running with current nx-libs git from https://github.com/ArcticaProject/nx-libs. EL7 server and client. Any ideas or suggestions? Thanks. -- Orion Poplawski Technical Manager 303-415-9701 x222 NWRA, Boulder/CoRA Office FAX: 303-415-9702 3380 Mitchell Lane orion(a)nwra.com Boulder, CO 80301 http://www.nwra.com

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firefox freezing by right-click
by olafs6＠gmx.de 22 Mar '16

22 Mar '16

Hello! I installed the x2goclient in puppy (tahr). When I start a session on my x2go server (Ubuntu 14.04) with this client I have problems with firefox 42.0: - Right-click in Firefox (link, empty space, ...) causes somewhere that the browser for about half a minute to freeze completely -> If I click when he is working again, in the opened context menu on any point, the browser freezes again for the same time again. - Click the top right on "Organize Bookmarks" also causes freezing The whole happens only when using under puppy. Even with use of another x2go server (also Ubuntu 14.04 but Firefox 41.0.1) of puppy from there the same mistake. This happens also when Firefox is directly called x2go, ie without the favored else from me LXDE. When I call a x2go session with a client software on other distributions (Windows, Ubuntu, OpenSuse), the problem does not occur. What here comes with puppy in the way? Greeting, Olaf

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Clientside Printing
by D.Lang 21 Mar '16

21 Mar '16

Hello, it is possible to print from the windows terminal server? for explanation: Windows 7 (ClientPrinter) -> X2goServer -> WindowsTerminalServer i read this Article http://wiki.x2go.org/doku.php/doc:usage:printing http://wiki.x2go.org/doku.php/doc:installation:printing but that does not solve my problem. In my Session, i choose "Connect to Windows Terminal Server" and the Connections works fine, but the printer will not be displayed. The Option "Clientside Printing" is active Can someone help me here? Thanks in advance

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Multi monitor not working
by Mario 16 Mar '16

16 Mar '16

Hi everyone, i'm running an x2goserver on a 32bit Kubuntu Trusty Tahr Vmware workstation 9 vm. I have the following debs installed there: ii x2goagent 2:3.5.0.32-0~668~ubu all ii x2goclient 4.0.5.0-0~1099~ubunt i386 ii x2goserver 4.0.1.19-0~1064~ubun i386 ii x2goserver-extensions 4.0.1.19-0~1064~ubun all ii x2goserver-xsession 4.0.1.19-0~1064~ubun all The client is my laptop running 64 bit Kubuntu Trusty Tahr with an extra monitor connected. It has the following packages installed: ii x2goclient 4.0.5.0-0~1099~ubuntu14. amd64 Everything is working as expected but i cannot get any of the methods described in http://wiki.x2go.org/doku.php/doc:usage:multi-display to work. When i stretch my x2go client window over multiple monitors the server sees it as on big screen. It does so regardless of whether i check Xinerama extension or not. My laptop has Xinerama enabled. How would i go about getting this to work? -- Grüße/Regards Mario

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x2go to LXC containers
by Michael Eager 15 Mar '16

15 Mar '16

I'm running into a problem using x2go with LXC containers. I've been using x2go to connect to an LXC container for some time with no problem. I've created a new container on the same host and I'm able to connect to it using SSH. I can also connect to the new container with x2go, as long as I'm not connected to the old container. If I start two x2go sessions at the same time, both fail. At least some of the time, I am no longer able to connect using SSH and need to restart the container. -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

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Customize Published Applications menu layout
by Gabriel Machado 15 Mar '16

15 Mar '16

Hi people! I've installed x2go on a server i'm configuring anda i'm impressed in how good it works! I would like to have all applications on my Published Applications menu on the top level, but can't figure how! I've tried to copy the .menu file to the /etc/xdg folder but it didn't changed a thing! It seems only to use default categories from freedesktop. Is it a hard coded feature or there is a file to change its layout? Thank you! Gabriel Fonseca.

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The remote proxy closed the connection while negotiating the session.
by swizz ly 14 Mar '16

14 Mar '16

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Sluggish response
by Timo 11 Mar '16

11 Mar '16

Hi, X2Go Client v. 4.0.5.0 (Qt - 4.8.6) GeForce GT 430 1GiB Driver 361.28 x2goserver 4.0.1.19-0~1064~ubuntu14.04.1 Ubuntu 14.04.4 local and remote ADSL 7/1 Mbps I have used x2go quite a long time to work from home. It have been working very nicely. But recently it have started to have very slow resume and sluggish response. It may take minutes to construct all the windows in the session at the resume and unminimize. Local desktop goes very sluggish as well. I have a lot of application windows open and using full screen session. I have investigated a little an noticed symptoms like this: When I resume the session and get a chance to minimize it, I see that memory usage of graphics card have shot to 100% and Xorg takes 100% CPU. This happened just this morning. Then I launched Thunderbird locally and saw that the memory usage dropped to 10% and everything started to behave normally again. But then I suspended the x2go session, resumed it again and the same slugginesh and symptoms came back. I have tried ADSL and WAN connection but didn't see any difference. What should I try next? Can I somehow force Xorg/x2go not to commit all graphics memory or something? -- Timo

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x2go overwrites LD_LIBRARY_PATH
by Thomas Stephan 11 Mar '16

11 Mar '16

Hi, I am using x2go to connect to machines running Ubuntu 14.04.3 LTS. I had trouble running commands that rely on finding libraries via the environment variable LD_LIBRARY_PATH. LD_LIBRARY_PATH is set in a script in /etc/profile.d because this is a system wide configuration and it needs to be performed once per login. Using ssh to remote login, LD_LIBRARY_PATH is correct: echo $LD_LIBRARY_PATH /usr/lib/fsl/5.0 When I login using x2go, LD_LIBRARY_PATH seems to be reset and contains only the entries regarding x2go: echo $LD_LIBRARY_PATH /usr/lib/nx/X11/Xinerama:/usr/lib/nx/X11 My guess is that there is probably an error in /usr/bin/x2goruncommand, along these lines: test -n "$LD_LIBRARY_PATH" && \ LD_LIBRARY_PATH="$NX_XINERAMA_LIBS:$NX_LIBS:$LD_LIBRARY_PATH" || \ LD_LIBRARY_PATH="$NX_XINERAMA_LIBS:$NX_LIBS" "$X2GO_LIB_PATH/x2gosyslog" "$0" "debug" "exporting LD_LIBRARY_PATH=$LD_LIBRARY_PATH" export LD_LIBRARY_PATH But I can not see why it is that my path only contains $NX_XINERAMA_LIBS:$NX_LIBS, and not $NX_XINERAMA_LIBS:$NX_LIBS:$LD_LIBRARY_PATH. Thank you for your help! Best Thomas -- Dr. Thomas Stephan Arbeitsgruppe für funktionelle, strukturelle und molekulare Bildgebung Neurologisches Forschungshaus Klinikum Grosshadern Feodor-Lynen-Str. 19 81377 München Thomas.Stephan(a)lrz.uni-muenchen.de +49 89 4400-74819 (Fon) +49 89 4400-74801 (Fax)

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x2go-client depends on xorg-xauth?
by Bruno Pagani 09 Mar '16

09 Mar '16

Hi, I’m currently using x2go-client on a (Arch) Linux desktop (connecting to a Ubuntu x2go server, on which I’m not admin), and I’ve found out that it apparently needs xorg-xauth to work properly. Is that indeed the case? Because I can’t found a list of dependencies outside of nx, qt4 and libssh, and the current ArchLinux or Fedora packages (for instance) do not depend on it. Thanks, Bruno P.S.: Since I’m not suscribed to this list, please be sure to keep me in CC when you answer this. ;)

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Reconnect to session
by Michael Eager 09 Mar '16

09 Mar '16

Hi -- I'm trying to reconnect to an existing session using the x2goclient GUI, or using the pyhoca-cli command line. This does not work. I'm also not able to suspend a running session. When I use x2goclient to re-connect to a server, the old session is listed as running. This is also displayed by the CLI: $ pyhoca-cli -L --server qc pyhoca-cli[18645] NOTICE: preparing requested X2Go session pyhoca-cli[18645] (PyHocaCLI) NOTICE: preparing requested X2Go session pyhoca-cli[18645] (x2gosessregistry-pylib) NOTICE: registering X2Go session Pyhoca-Client_Session... pyhoca-cli[18645] (x2goclient-pylib) NOTICE: initializing X2Go session... pyhoca-cli[18645] (x2gocontrolsession-pylib) NOTICE: connecting to [qc]:22 pyhoca-cli[18645] (x2gosession-pylib) NOTICE: SSH host key verification for host [qc]:22 with SSH-RSA fingerprint ,,32:90:4a:a5:9e:ee:a6:0a:c9:6a:8c:b5:b3:64:0c:28'' initiated. We are seeing this X2Go server for the first time. pyhoca-cli[18645] (x2goclient-pylib) WARN: HOOK_check_host_dialog: host check requested for session profile Pyhoca-Client_Session: Automatically adding host [qc]:22 with fingerprint: ,,32:90:4a:a5:9e:ee:a6:0a:c9:6a:8c:b5:b3:64:0c:28'' as a known host. Available runing/suspended X2Go sessions ======================================== Host: qc - [192.168.20.31]:22 Username: eager Session Name: eager-50-1454378567_stDKDE_dp24 ------------- cookie: a83052f708f4a91288b921652fcc8201 agent PID: 1579 display: 50 status: R graphic port: 30003 snd port: 30004 sshfs port: 30005 username: eager hostname: qc create date: 2016-02-01T18:02:47 suspended since: 2016-02-12T12:04:58 When I try to suspend it using the CLI, I'm told that this works, but in fact, it does not: $ pyhoca-cli --server qc -S ALL pyhoca-cli[18762] NOTICE: preparing requested X2Go session pyhoca-cli[18762] (PyHocaCLI) NOTICE: preparing requested X2Go session pyhoca-cli[18762] (x2gosessregistry-pylib) NOTICE: registering X2Go session Pyhoca-Client_Session... pyhoca-cli[18762] (x2goclient-pylib) NOTICE: initializing X2Go session... pyhoca-cli[18762] (x2gocontrolsession-pylib) NOTICE: connecting to [qc]:22 pyhoca-cli[18762] (PyHocaCLI) NOTICE: X2Go session eager-50-1454378567_stDKDE_dp24 has been suspended $ pyhoca-cli -L --server qc pyhoca-cli[18806] NOTICE: preparing requested X2Go session pyhoca-cli[18806] (PyHocaCLI) NOTICE: preparing requested X2Go session pyhoca-cli[18806] (x2gosessregistry-pylib) NOTICE: registering X2Go session Pyhoca-Client_Session... pyhoca-cli[18806] (x2goclient-pylib) NOTICE: initializing X2Go session... pyhoca-cli[18806] (x2gocontrolsession-pylib) NOTICE: connecting to [qc]:22 Available runing/suspended X2Go sessions ======================================== Host: qc - [192.168.20.31]:22 Username: eager Session Name: eager-50-1454378567_stDKDE_dp24 ------------- cookie: a83052f708f4a91288b921652fcc8201 agent PID: 1579 display: 50 status: R graphic port: 30003 snd port: 30004 sshfs port: 30005 username: eager hostname: qualcomm create date: 2016-02-01T18:02:47 suspended since: 2016-02-12T12:05:34 At another time, when I connected to a server using x2goclient, it created a new session, rather than re-connecting to the suspended session which was running. When I tried to connect to the suspended session, nothing happened. The GUI went blank and no X screen was displayed. Questions: 1 -- How can I connect to a session which is marked as running? 2 -- How can I suspend a session which is running? 3 -- How can I connect to a suspended session on a server? 4 -- How can I specify the session to connect to using the pyhoca-cli CLI? Thanks! -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

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x2go client within Xnest
by Markus 09 Mar '16

09 Mar '16

Hi, is there a way to start an x2go client session within Xnest? My first try: Pyhoca-cli starts but does not show a window within Xnest, when starting a session. My second try: Standard x2go client shows an unreadable error message when starting a session. regards, Markus

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Sessions and pids
by Karres, Dean 07 Mar '16

07 Mar '16

Hi, I am looking for advice. We have a few x2go "servers". We have customers that use the client on laptops to connect to the servers and do what they do. I need to account for the time they have active x2go sessions. We have tools to get user login/out data. The behavior we are seeing is as follows: 1. Customer-A logs in via the pc client. 2. Customer-A does or starts work then literally closes the laptop and walks away. 3. After the default SSH timeout his "connection" ends but the x2go session continues. 4. Later, the laptop is reopened and the x2go session is resumed. 5. ... repeat... I have put small scripts in all of the "extensions" sub-dirs to report the activity. They really just report the result of "/usr/bin/x2golistsessions". * After #1 I see the pre-and post-start scripts but they are NOT reporting a PID number. * After #2 I can see our normal logout process run after the ssh connection timeout. * After #4 I see our normal login process run due to the new ssh connection; and I see the pre and post-resume scripts run and they DO have PIDs. I can imagine that the "pre-start" script hook might not have access to a running PID yet but is there any way for the post-start script to get the PID? I could craft a special version of our audit tools to deal with a numeric PID in the pre or post-start scripts and treat it like a console or ssh "login". I suppose I could craft it to use the x2go sessionID but that will cause a lot of other changes in out existing audit tools. Thanks

1 0

SSH key generation in Windows
by Sébastien Ducoulombier 03 Mar '16

03 Mar '16

Hello, I am considering restricting access to my X2Go servers : I'd like to disable password authentication. I need all my X2Go client users to generate their own SSH keys and transfer the public part to the server. I wrote a simple guide for Linux and Mac users, but I still miss Windows support, since I do not have windows systems around me. I found http://wiki.x2go.org/doku.php/wiki:advanced:authentication:passwordless-ssh… Does that wiki documented procedure work with XP, Seven and W10 ? -- Sébastien

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x2go-user March 2016