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Review: changes and features in X2Go
by Oleksandr Shneyder 03 Feb '12

03 Feb '12

Hello X2Go users, I want to describe some changes we made in X2Go recently. == Multi display support features. == There are two new features in X2Go to support desktops with more then one physical display. 1. Run X2Go Session in "full screen" mode on one of several physical displays. With this feature you can use one of your physical monitors to display X2Go session in "full screen" mode. On this photo you can see a Windows 7 notebook with a connected VGA monitor running X2Go Session on display 2: http://www.x2go.org/_media/news:two_sess.png You can configure this feature using Session Preferences dialog in X2Go client: http://www.x2go.org/_media/news:multidisp_set.png Push "Identify all displays" button to find out the numbers of a physical displays: http://www.x2go.org/_media/news:ident_dsip.png 2. Using two or more physical displays as one large virtual display (Xinerama) The advantage of Xinerama feature is to only maximize windows to the dimensions of the active physical display. This can be very useful not only for thinclients with more then one physical displays, but also if user stretch their X2Go sessions over more then one display in "window" mode. X2Go Session running 3 maximized LibreOffice windows is stretched over 3 physical displays: http://www.x2go.org/_media/news:xinerama.png Xinerama configuration of X2Go session will be automatically updated every time when user moving or resizing his X2Go Session window. ==Verifying if port is free before resuming X2Go Session == On start of an X2Go session 3 tcp ports for ssh tunnels (graphic, sound, sshfs) are reserved. The values of these ports are stored in the X2Go session database and used by X2Go clients every time an X2Go session gets resumed. Sometimes it can happen that one of these ports is already used by another application after the session had been suspended. As result, X2Go client will be unable to resume such session or start sound or sshfs tunnel. To avoid this problem X2Go server (>= 3.1.0.0) will verify if these ports are still unused before the session will be resumed. In other case new ports will be reserved. The new port values will be updated in database and sent to the X2Go client. IMPORTANT: Older versions of X2Go client will be compatible with newest X2Go servers. If ports have changed between suspend and resume of a session, older x2goclients will try to reconnect and fail. But on the next attempt, X2Go client will retrieve the updated port values from the X2Go session database. regards, Alex -- Oleksandr Shneyder Dipl. Informatik X2go Core Developer Team email: oleksandr.shneyder(a)obviously-nice.de web: www.obviously-nice.de --> X2go - everywhere@home

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Re: [X2go-User] how to completely remove/purge and reinstall
by Richard Strysniewicz 02 Feb '12

02 Feb '12

On 01/16/2012 07:42 PM, Richard Strysniewicz wrote: > > > On 01/16/2012 07:28 PM, John A. Sullivan III wrote: >> <Snip> >> Just a hunch - I wonder if there is an underlying SSH problem - John >> > I cannot say for sure, but I do believe basic ssh is working fine... > I have public/private keys set up and I do ssh between the machines > frequently. I have never had a failure to connect or any other error > using ssh from the command line. Is there something I can try besides > plain old command line ssh to more closely emulate what is going on > with x2go connections? > > Thanks, > Richard Sorry, accidentally replied directly instead of to the list...

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Problem sharing folder on Ubuntu 11.10
by Carthik Sharma 31 Jan '12

31 Jan '12

Hi, I have problems sharing folder from a client to the server on Ubuntu 11.10 Both the x2gouser and the user with the active session are members of the fuse group on the server I have installed the stable version of the server and client from the launchpad x2go/stable ppa. Here's what I see on the server, with loglevel debug: Jan 5 09:11:40 zax /usr/bin/x2goresume-session: client 10.173.156.160 has successfully resumed session with ID carthik-51-1325771783_stDGNOME_dp24 Jan 5 09:11:40 zax /usr/bin/x2gofeature: x2gofeature called with options: X2GO_DESKTOPSHARING Jan 5 09:11:40 zax /usr/share/x2go/x2gofeature.d/x2goserver-compat.features: x2goserver-compat.features called with options: X2GO_DESKTOPSHARING Jan 5 09:11:40 zax /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_DESKTOPSHARING Jan 5 09:11:40 zax /usr/share/x2go/x2gofeature.d/x2goserver.features: x2goserver.features called with options: X2GO_DESKTOPSHARING Jan 5 09:11:41 zax /usr/share/x2go/x2gofeature.d/x2goserver-printing.features: x2goserver-printing.features called with options: X2GO_DESKTOPSHARING Jan 5 09:11:41 zax /usr/share/x2go/x2gofeature.d/x2goserver-xsession.features: x2goserver-xsession.features called with options: X2GO_DESKTOPSHARING Jan 5 09:11:41 zax /usr/bin/x2gofeature: x2gofeature called with options: X2GO_RUN_EXTENSIONS Jan 5 09:11:41 zax /usr/share/x2go/x2gofeature.d/x2goserver-compat.features: x2goserver-compat.features called with options: X2GO_RUN_EXTENSIONS Jan 5 09:11:41 zax /usr/share/x2go/x2gofeature.d/x2goserver-extensions.features: x2goserver-extensions.features called with options: X2GO_RUN_EXTENSIONS Jan 5 09:11:41 zax /usr/bin/x2goserver-run-extensions: x2goserver-run-extensions called with options: carthik-51-1325771783_stDGNOME_dp24 post-resume Jan 5 09:11:42 zax /usr/bin/x2gomountdirs[29677]: x2golistmountdirs has been called with options: dir carthik-51-1325771783_stDGNOME_dp24 carthik home/carthik/.x2go/ssh/key.Vs1670 /home/carthik/.x2go/S-carthik-51-1325771783_stDGNOME_dp24/spool__PRINT_SPOOL___REVERSESSH_PORT__30004 Jan 5 09:11:42 zax /usr/bin/x2gomountdirs[29677]: mounting /tmp/spool_carthik/carthik-51-1325771783_stDGNOME_dp24, mount point type is print spool directory Jan 5 09:11:42 zax /usr/bin/x2gomountdirs[29677]: db_insertmount called, session ID: carthik-51-1325771783_stDGNOME_dp24, path: /tmp/spool_carthik/carthik-1-1325771783_stDGNOME_dp24, client: 127.0.0.1; return value: 1 Jan 5 09:11:42 zax /usr/bin/x2gomountdirs[29677]: executing: sshfs -o idmap=user,uid=`id -u`,gid=`id -`,ServerAliveInterval=300,Cipher=blowfish,IdentityFile=/home/carthik/.x2go/ssh/key.Vs1670,UserKnownHostsFile=/home/carthik/.x2go/ssh/key.Vs1670.ident carthik"@127.0.0.1:"/home/carthik/.x2go/S-carthik-51-1325771783_stDGNOME_dp24/spool" "/tmp/spool_carthik/carthik-51-1325771783_stDGNOME_dp24" -p 30004 Jan 5 09:11:43 zax /usr/bin/x2gomountdirs[29677]: WARNING: mounting of /home/carthik/.x2go/S-carthik-51-1325771783_stDGNOME_dp24/spool failed Jan 5 09:11:43 zax /usr/bin/x2gomountdirs[29677]: db_deletemount called, session ID: carthik-51-1325771783_stDGNOME_dp24, path: /tmp/spool_carthik/carthik-1-1325771783_stDGNOME_dp24 Jan 5 09:13:03 zax /usr/bin/x2gomountdirs[29884]: x2golistmountdirs has been called with options: dir carthik-51-1325771783_stDGNOME_dp24 carthik /home/carthik/.x2go/ssh/key.Wr1670 /home/carthik/pers/docs__REVERSESSH_PORT__30004 Jan 5 09:13:03 zax /usr/bin/x2gomountdirs[29884]: db_insertmount called, session ID: carthik-51-1325771783_stDGNOME_dp24, path: /tmp/carthik_media/disk/_home_carthik_pers_docs, client: 127.0.0.1; return value: 1 Jan 5 09:13:03 zax /usr/bin/x2gomountdirs[29884]: executing: sshfs -o idmap=user,uid=`id -u`,gid=`id -g`,ServerAliveInterval=300,Cipher=blowfish,IdentityFile=/home/carthik/.x2go/ssh/key.Wr1670,UserKnownHostsFile=/home/carthik/.x2go/ssh/key.Wr1670.ident "carthik"@127.0.0.1:"/home/carthik/pers/docs" "/tmp/carthik_media/disk/_home_carthik_pers_docs" -p 30004 Jan 5 09:13:03 zax /usr/bin/x2gomountdirs[29884]: WARNING: mounting of /home/carthik/pers/docs failed Jan 5 09:13:04 zax /usr/bin/x2gomountdirs[29884]: db_deletemount called, session ID: carthik-51-1325771783_stDGNOME_dp24, path: /tmp/carthik_media/disk/_home_carthik_pers_docs Any help would be great. Please let me know if any other info is required or missing. Thanks, Carthik. ***** Phone: 407 421 3062 Email: mail(a)carthik.net Skype: carthikdotnet

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Problem with xfreerdp ( any version )
by Helmer Teles 31 Jan '12

31 Jan '12

Hello, dear x2go users. I'm facing a problem with x2go and freerdp ( http://www.freerdp.org ) Whenever i try to call a rdp session to a windows 2008 server i have the following log error connected to 192.168.200.102:3389 null server certificate X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 1 (X_CreateWindow) Serial number of failed request: 27 Current serial number in output stream: 31 This was working till last Thursday when i updated the x2goserver vm host. This vm runs on KVM and there aren't any problems when using rdesktop instead of freerdp. More info: lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 11.10 Release: 11.10 Codename: oneiric xdpyinfo name of display: :52 version number: 11.0 vendor string: The X.Org Foundation vendor release number: 60900000 X.Org version: 6.9.0 maximum request size: 16777212 bytes motion buffer size: 256 bitmap unit, bit order, padding: 32, LSBFirst, 32 image byte order: LSBFirst number of supported pixmap formats: 7 supported pixmap formats: depth 1, bits_per_pixel 1, scanline_pad 32 depth 4, bits_per_pixel 8, scanline_pad 32 depth 8, bits_per_pixel 8, scanline_pad 32 depth 15, bits_per_pixel 16, scanline_pad 32 depth 16, bits_per_pixel 16, scanline_pad 32 depth 24, bits_per_pixel 32, scanline_pad 32 depth 32, bits_per_pixel 32, scanline_pad 32 keycode range: minimum 8, maximum 255 focus: window 0x20000d, revert to PointerRoot number of extensions: 27 BIG-REQUESTS DAMAGE DEC-XTRAP DOUBLE-BUFFER DPMS Extended-Visual-Information GLX MIT-SHM MIT-SUNDRY-NONSTANDARD RANDR RECORD RENDER SECURITY SGI-GLX SHAPE SYNC TOG-CUP X-Resource XC-APPGROUP XC-MISC XFIXES XFree86-Bigfont XINERAMA XInputExtension XKEYBOARD XTEST XVideo default screen number: 0 number of screens: 1 screen #0: dimensions: 1280x800 pixels (433x271 millimeters) resolution: 75x75 dots per inch depths (7): 24, 1, 4, 8, 15, 16, 32 root window id: 0x7a depth of root window: 24 planes number of colormaps: minimum 1, maximum 1 default colormap: 0x60 default number of colormap cells: 256 preallocated pixels: black 0, white 16777215 options: backing-store NO, save-unders NO largest cursor: 1280x800 current input event mask: 0x400000 PropertyChangeMask number of visuals: 12 default visual id: 0x5c visual: visual id: 0x54 class: TrueColor depth: 24 planes Kernel Version 3.0.0-15-server #26-Ubuntu SMP Fri Jan 20 19:07:39 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux xvinfo X-Video Extension version 2.2 screen #0 no adaptors present Thanks for any help you guys can provide. -- Helmer Teles eM@il : helmer.teles(a)gmail.com Web Page: http://hteles.wordpress.com

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x2goclient entered Debian unstable
by Mike Gabriel 28 Jan '12

28 Jan '12

Dear all, The Debian X2Go Packaging Team and the X2Go Project proudly announce that x2goclient has entered Debian unstable. http://qa.debian.org/developer.php?login=pkg-x2go-devel%40lists.alioth.debi… Package compatibility is currently tested by Ubuntu developers and we hope to get x2goclient (and nx-libs-lite) into Ubuntu 12.04. The chances are good that this will work out. Greets, Mike -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de

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X2Go bugfix release: x2goclient 3.99.0.5
by Mike Gabriel 28 Jan '12

28 Jan '12

Dear all, The X2Go Project has found and fixed a bug in X2Go Client and is releasing a bugfix version: - x2goclient (3.99.0.5) The release fixes a segmentation fault of X2Go Client after session login failure. Packages for Debian/Ubuntu/Win32 will be available some time during today. light+love, Mike X2GOCLIENT ========== x2goclient (3.99.0.5-0~x2go1) unstable; urgency=low [ Mike Gabriel ] * New upstream version (3.99.0.5): - Rename in human readable text strings ,,X2go'' to ,,X2Go''. - Fix version string on man page. [ Oleksandr Shneyder ] * New upstream version (3.99.0.5): - Waiting for SshMasterConnection thread to be finished before deleting it (segfault by wrong authentication fix). -- Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de>\ Fri, 27 Jan 2012 12:43:04 +0100 -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x… Dear all, The X2Go Project has found and fixed a bug in NX (redistributed) and is releasing a bugfix version (incl. x2goagent): - nx-libs incl. x2goagent (3.5.0.8) The release fixes an issue that has been brougth to our attention by Stefan Baur: <quote> > Steps to reproduce: > 1. Run Terminal as single application (not in a full-blown desktop > - everything works fine there) > 2. Type: kdialog --yesno "Test" > 3. Session will crash </quote> @Marcelo: This problem has been present in latest FreeNX packages as well, please check this commit in X2Go Git: http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=cf5a5980cf0b3dc0c0… light+love, Mike NX-LIBS ======= nx-libs (2:3.5.0.8-0) RELEASE; urgency=low * Reorganize patch names, to reflect patch inclusion into lite+full or full-only ,,NX (redistributed)'' tarball. * Update patch: 001_add-main-makefile.full+lite.patch, only build, install, clean etc. NX subprojects if the folder exists. * Package x2goagent is an ,,all'' package, not ,,any''. * Add folder /debian/patches-pending-evaluation with two newly discovered patches from git.etersoft.ru (AltLinux packaging repository for NX). * Fix patch: 109_nxagent_locale-utf8-compound-text.patch, fix crashes reported from Stefan Baur. Thanks for reporting and testing!!! -- Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de> Sun, 22 Jan 2012 23:36:19 +0100 -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x… Dear all, The X2Go Project has found and fixed a bug in NX (redistributed) and is releasing a bugfix version (incl. x2goagent): - nx-libs incl. x2goagent (3.5.0.8) The release fixes an issue that has been brougth to our attention by Stefan Baur: <quote> > Steps to reproduce: > 1. Run Terminal as single application (not in a full-blown desktop > - everything works fine there) > 2. Type: kdialog --yesno "Test" > 3. Session will crash </quote> @Marcelo: This problem has been present in latest FreeNX packages as well, please check this commit in X2Go Git: http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=cf5a5980cf0b3dc0c0… light+love, Mike NX-LIBS ======= nx-libs (2:3.5.0.8-0) RELEASE; urgency=low * Reorganize patch names, to reflect patch inclusion into lite+full or full-only ,,NX (redistributed)'' tarball. * Update patch: 001_add-main-makefile.full+lite.patch, only build, install, clean etc. NX subprojects if the folder exists. * Package x2goagent is an ,,all'' package, not ,,any''. * Add folder /debian/patches-pending-evaluation with two newly discovered patches from git.etersoft.ru (AltLinux packaging repository for NX). * Fix patch: 109_nxagent_locale-utf8-compound-text.patch, fix crashes reported from Stefan Baur. Thanks for reporting and testing!!! -- Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de> Sun, 22 Jan 2012 23:36:19 +0100 -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x… _______________________________________________ X2go-Announcement mailing list X2go-Announcement(a)lists.berlios.de https://lists.berlios.de/mailman/listinfo/x2go-announcement

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Connection fails when connecting windows client
by christoffer krakou 26 Jan '12

26 Jan '12

Hello X2go-people I have a Ubuntu 11.10 server running X2go. From my own ubuntu i can connect fine with the 3.0.99.04 client from the PPA archive. The server's version is 3.0.99.9. When a Windows client connects (v. 3.0.99.4) to my server, the client program seems to hang at "connecting". On the server, a process called x2gostartsession goes completely nuts and takes up all the system resources. The session is owned by the user trying to log in. What can this be caused by? -- Venlig Hilsen / Best Regards Christoffer Krakou Fleten.net APS

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AD integration?
by Jonathan Brown 25 Jan '12

25 Jan '12

Hello, I have been researching various options and it seems that x2go is preferable as it is based on nx and is actively developed. I want to try it out, however just had a quick question on AD integration. I understand there is this ldap option for the client, however, what about just joining the host server to a domain using likewise or centrify, and then once confirmed that users can log in via console and ssh with AD, can we not use the x2go client to log in as AD user? Also would their be a designation such as DOMAIN\\ADusername ? Thanks! -- *"It is only when each individual has achieved inner peace that we will see lasting outer peace in the world" *

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x2go Plugin
by senrabdet＠aol.com 25 Jan '12

25 Jan '12

Hi All - Is anyone using the x2go plugin? We tried to get it running, have a web server set up, but the plugin links on the website seem to be "in transition". Does anyone have experience using the plugin, and have a copy (not sure that last request makes sense) we could get? Thanks!

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Printing Security
by senrabdet＠aol.com 25 Jan '12

25 Jan '12

Hi All - There is a post on the new site re printing security (see below). Does anyone have experience with Possible Solution 1? We're hoping to get a few more pointers, maybe some extra documentation, some "here's how you avoid these pitfalls". Thanks! X2goServer == CUPS Server, latest implementation (as of 20110909): cups-x2go CUPS backend runs as root as root the backend launches x2goprint (without sudo!!!) x2goprint script changes owner ship of PDF file and pushes it into SSHFS share towards the X2go client. using X2go printing locally (X2go server == CUPS server) then security (sudo) is not an issue any more(?) Nope still is (not a big one, though): Using CUPS the user can easily be faked, allowing to fill someone else's quota or print at their home printer. X2goServer != CUPS Server: The Cups-server connects the x2go-Server as x2goprint-user using ssh-key auth. x2goprint-user executes sudo to change the ownership of the PDF file and pushes it into SSHFS share towards the X2go client. This script can currently be exploited. If someone becomes x2goprint he might become root. Possible solution 1 Start a local cups-server for every user Server listens on a File-socket owned by the user Add a PDF-Printer to that server (as the cups-user runs as that user, there should be no issues with file permissions) Import printers from global server + Secure solution, as no other user is involved - Every user needs an extra instance (The extra memory usage should not be too much) Possible solution 2 Write a simple C-Program 'x2goprinter' that is run as the user who wants to print unsing the s-Bit The Program writes stdin to argv[1] in the printing-directory It also checks whether the user is x2goprint or root + Can be easily adopted - x2goprint must be installed by the client - s-bit → Needs security checks

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