x2go-dev

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5399 discussions

Roadmap for x2goclient 4.0?
by Oliver Burger 08 Jan '12

08 Jan '12

Hi, I see, there are 3.99.x versions of x2goclient in the download area.Is there any kind of roadmap for the release of x2goclient-4.0? For building the 3.99.x versions of x2goclient for the official Mageiarepos I would need to know, if it reaches final before our versionfreeze in April. Thanks, Oliver

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Untrusted library search path in x2gostartagent bash script
by Hayawardh V 07 Jan '12

07 Jan '12

Hi, There is an untrusted library search path vulnerability in x2gostartagent. Lines 188,189 in /usr/bin/x2gostartagent in the Ubuntu PPA package say: LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${X2GO_LIB}" export LD_LIBRARY_PATH If one of these are empty, then there will be an empty addendum to LD_LIBRARY_PATH, which will make ld search for libraries in the current working directory. Programs xauth, x2goserver-run-extensions and x2gofeature (and the programs further spawned by them, including perl, basename, find, grep, sort, bash etc.) are launched with this insecure LD_LIBRARY_PATH. Thus, the current working directory will be searched for shared libraries when this command is launched. Usually, x2gostartagent is launched over ssh, and the current working directory will be the user's home directory. The problem is that if a user is tricked into downloading a malicious library off the Internet and saves it into his home directory, this malicious library will be loaded and can take control of the user's process when an x2go session is launched. The fix is simply to check if either LD_LIBRARY_PATH or X2GO_LIB are empty. I am pasting the patch below. Please keep me updated on this issue. Thanks, Hayawardh Vijayakumar --- /usr/bin/x2gostartagent 2012-01-05 17:48:07.843705023 -0500 +++ /usr/bin/x2gostartagent.fixed 2012-01-05 16:44:41.839705377 -0500 @@ -184,8 +184,13 @@ X2GO_COOKIE=`mcookie` +if [ ! ${LD_LIBRARY_PATH} ] || [ ! ${X2GO_LIB} ] +then + LD_LIBRARY_PATH="${LD_LIBRARY_PATH}${X2GO_LIB}" +else + LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${X2GO_LIB}" +fi -LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${X2GO_LIB}" export LD_LIBRARY_PATH PATH="${PATH}:${X2GO_BIN}/"

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Re: [X2go-Dev] [X2go-User] Suspend and Resume in 1 click (was: Terminate and resume in 1 click ?)
by Mike Gabriel 05 Jan '12

05 Jan '12

Hi Jean, On Do 05 Jan 2012 01:27:59 CET Jean Gottschalk wrote: > thank you for your reply and sorry for using the wrong wording, as I didn't > have the client open in front of me. > I imagine it would be quite easy to code, since the underlying functions > are essentially already there. They just need to stop greying out the > resume button when a session is still attached, and instead, trigger a > suspend in that case, followed by a resume (with maybe a short pause in > between if needed). the main developer of x2goclient is currently on vacation. Let's see what he says when he comes back and sees your proposal. 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 freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Re: [X2go-Dev] [X2go-User] Suspend and Resume in 1 click (was: Terminate and resume in 1 click ?)
by Mike Gabriel 04 Jan '12

04 Jan '12

Hi Jean, On Mi 04 Jan 2012 16:02:39 CET Jean Gottschalk wrote: > I have been using X2go for a few weeks now, and it works really well. In my > application, users keep a session open indefinitely, and carry it from one > terminal to another. When doing this, the session is usually still open on > a previous terminal, so when taking the session to a new terminal, the user > has to first click the terminate button, then the resume button. Here you mean (in our terminologyy): suspend and then resume... (not terminate). > Wouldn't it be more straightforward to include a terminate operation in the > resume button, so that one can resume a session in one click, without > clicking the terminate button first, and the client will terminate the > session if necessary before resuming it? This is how NXclient works (which > I used before). > Is there perhaps already a way to do this by modifying a command line > argument or a script somewhere? This feature is available in the systray applet PyHoca-GUI, but not (yet?) in x2goclient. I'll cross-post to x2go-dev to make sure x2goclient developers notice your request. 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 freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Specific package versions wanted / Question regarding repository content
by Stefan Baur 29 Dec '11

29 Dec '11

Hi list, as I'm still trying to figure out what exactly happened here (https://lists.berlios.de/pipermail/x2go-dev/2011-December/003122.html) I'm looking for the following two packages in these specific versions: libxcompext3=1:3.5.0-1-0~x2go-bpo1+lenny~main~36~build1 libxcompshad3=3.5.0-2-0~x2go-bpo1+lenny~main~24~build1 Does anybody know which repository I have to enable to be able to pull exactly those? So far I tried: deb http://packages.x2go.org/debian lenny main deb http://packages.x2go.org/debian lenny heuler deb http://packages.x2go.org/debian squeeze main deb http://packages.x2go.org/debian squeeze heuler but I keep getting apt-get install libxcompext3=1:3.5.0-1-0~x2go-bpo1+lenny~main~36~build1 libxcompshad3=3.5.0-2-0~x2go-bpo1+lenny~main~24~build1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '1:3.5.0-1-0~x2go-bpo1+lenny~main~36~build1' for 'libxcompext3' was not found E: Version '3.5.0-2-0~x2go-bpo1+lenny~main~24~build1' for 'libxcompshad3' was not found And a related question, directed @Mike: Is there a particular reason why the "squeeze main" repository doesn't contain libxcompext3=2:3.5.0-0~x2go1+squeeze~heuler~20111206~128~build1 libxcompshad3=2:3.5.0-0~x2go1+squeeze~heuler~20111206~128~build1 ??? ==>Running freenx and x2go in parallel seems to be impossible with libxcompext3=1:3.5.0-1-2 and libxcompshad3=3.5.0-2-2 from "squeeze main", however installing either the old versions listed at the very top of this posting, or the unstable ones from "squeeze heuler" fixes the issue. Do these two "squeeze heuler" packages break something else, or would it be possible to offer them via "squeeze main"? Kind Regards, Stefan

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Client-side printing not working (most likely due to the x2goserver-printing package being unavailable for installation)
by Stefan Baur 29 Dec '11

29 Dec '11

Hi List, I installed a new X2Go server and wanted to try out client-side printing. The server is running Debian Squeeze, with the following X2Go- and CUPS-related packages installed: ii cups 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - server ii cups-bsd 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - BSD commands ii cups-client 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - client programs (SysV) ii cups-common 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - common files ii cups-driver-gutenprint 5.2.6-1 printer drivers for CUPS ii cups-ppdc 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - PPD manipulation utilities ii cups-x2go 3.0.0.3-0~x2go1+squeeze~main~54~build1 X2GO printer for CUPS ii cupsddk 1.4.4-7+squeeze1 Common UNIX Printing System (transitional package) ii cupsys 1.3.8-1+lenny10 Common UNIX Printing System (transitional package) ii cupsys-client 1.3.8-1+lenny10 Common UNIX Printing System (transitional package) ii ghostscript-cups 8.71~dfsg2-9 The GPL Ghostscript PostScript/PDF interpreter - CUPS filters ii hplip-cups 3.10.6-2 HP Linux Printing and Imaging - CUPS Raster driver (hpcups) ii libcups2 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - Core library ii libcupscgi1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - CGI library ii libcupsdriver1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - Driver library ii libcupsimage2 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - Raster image library ii libcupsmime1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - MIME library ii libcupsppdc1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - PPD manipulation library ii libxcompext3 1:3.5.0-1-0~x2go-bpo1+lenny~main~36~build1 NX X11 protocol compression extensions library ii libxcompshad3 3.5.0-2-0~x2go-bpo1+lenny~main~24~build1 NX shadowing library ii x2go-keyring 2011.12.07+squeeze~main~12~build1 GnuPG keys of X2go developers ii x2goagent 3.5.0.2-0~x2go1+squeeze~main~49~build1 Special X2go-ized X agent, forked from NX-X11 (NoMachine) ii x2goserver 3.0.99.8-0~x2go-bpo1+lenny~main~388~build1 X2go server daemon scripts ii x2goserver-extensions 3.0.99.8-0~x2go-bpo1+lenny~main~388~build1 X2go server daemon scripts (extensions) I was unable to follow the instructions from http://wiki.x2go.org/wiki:components:printing, as "apt-get install x2goserver-printing" complains: > Some packages could not be installed. This may mean that you have > requested an impossible situation or if you are using the unstable > distribution that some required packages have not yet been created > or been moved out of Incoming. > The following information may help to resolve the situation: > > The following packages have unmet dependencies: > x2goserver-printing : Depends: x2goserver (< > 3.0.99.8-0~x2go1+squeeze~main~373~build1.1~) but > 3.0.99.8-0~x2go-bpo1+lenny~main~388~build1 is to be installed > E: Broken packages > I decided to continue anyways and set up printing as described: > Description: Virtual X2GO Printer > Location: Cloud > Driver: Generic CUPS-X2GO Printer (color, 2-sided printing) > Connection: cups-x2go:/ > Defaults: job-sheets=none, none media=iso_a4_210x297mm sides=one-sided On the client side (Windows 7 Home Premium, German, 32-bit) I installed X2Go Client V. 3.99.0.2. I enabled client-side printing in the session settings, and configured the local default printer in the X2Go Client general settings. Nothing happens when I try to print, so I guess I can't do without the x2goserver-printing package. What needs to be done? Kind Regards, Stefan

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Re: [X2go-Dev] x2go Client on Mac OS X Lion (10.7) [Workaround]
by stefan73er＠e-postkasten.de 29 Dec '11

29 Dec '11

Dear all, i've updated to MacOS X Lion and get the known Problem that "Rosetta" is needed. I tried the Workaround > >Hello x2go mac os lion users, here is a workaround for using x2go > client on os x lion: > >1. Download and install OpenNX Client for Mac. > (http://sourceforge.net/projects/opennx/) >2. Inside the opennx...dmg right click the OpenNX.pkg and click "show > package content" >3. Doubleclick Contents/Archive.pax.gz >4. Go inside Archive/Library/OpenNX >5. Copy "bin" + "lib" + "share" to your clipboard (cmd-c) >6. Go to your x2goclient.app >7. Right click the x2goclient.app and click "show package content" >8. Go to "Contents" folder >9. Paste your clipboard inside this folder >10. Copy the content inside the "bin" folder to the "exe" folder > (nxproxy will be overwritten) > >Now you can start x2goclient and connect to your server. If you get > this error: "Invalid MIT-MAGIC-COOKIE-1 key" click on X11, start a > terminal an type >"xhost +localhost". > >Regards > >Stephan Diehl >Geschäftsführer > >Open Solutions GmbH & Co. KG >Luisenweg 109 >20537 Hamburg > and the error message went away. But i still can't connect to my x2go server. Aber i type in my username and password it shown "connecting" and the x2go client freezes and after some time (more or less a minute) the x2go window is closed and a mac system message says the application was closed and i can show the detail information of the problem or send a report to apple. Does anyone else have this problem? and is there a solution? Best Regards Stefan

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Informations about sshfs and mounting local device
by Jean Milot 22 Dec '11

22 Dec '11

Hello, I use freenx server. And i'm searching informations on sshfs and how i can mount a local device to the server. I can easily mount a server directory in local but i don't know how to mount to the server a local directory or after a device. Thanks for your help. Sincerely, Jean -- MILOT Jean Tél. : 0659514624 milot.jean(a)gmail.com

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SOLUTION: A generic way to print to cheap GDI-only printers (not only with X2Go)
by Stefan Baur 21 Dec '11

21 Dec '11

Hi List, since I've had issues getting client-side printing to work (which I need for low-budget printers that don't support PCL/PS), I built my own work-around. The following is an explanation on how to turn every printer that is connected to a Windows client into a printer that can be accessed with CUPS, regardless of the print protocol it speaks. IOW: If it can print from Windows, it can now print from CUPS as well, as long as it's connected to a Windows box. The advantage over using the X2Go built-in solution is that you don't even need a running X2Go client on the particular box - say, in a small two-person office with only one (low-budget inkjet) color printer, with the X2Go user wanting to print something in color, but the pritner is connected to the other machine, and the co-worker currently isn't using X2Go. Requirements: On the client computer: * RedMon - http://pages.cs.wisc.edu/~ghost/redmon/ * Sumatra PDF viewer - https://kjkpub.s3.amazonaws.com/sumatrapdf/rel/SumatraPDF-1.9-install.exe * fixed IP or DNS entry, proper gateway setting if server and client are located in different networks * Windows 2K or XP, and installation media / extracted service pack files OR Windows Vista / 7 *and lots of patience* On the server: Any recent CUPS server with CUPS-PDF installed --------------- Preparing the Server: --------------------- Log in as root (or run this prefixed with sudo) lpadmin -p "CLIENTNAMEHERE_LPD" -v "lpd://CLIENTDNSNAMEORIPHERE/PDFQueue" -D "Generic Printer" -L "CLIENTNAMEHERE" -E -m "lsb/usr/cups-pdf/CUPS-PDF.ppd" (everything on one line, substitute clientname and IP where required) --------------- Preparing the Client (Windows 2K/XP): ------------------------------------- 1) Go to Control Panel/Software, Windows Components and install the LPD Print Service (this may require you to insert installation media or point Windows to the folder with the extracted service pack files) 2) Check the Services - The TCP/IP-Print Service should be running and set to start automatically - if not, change it so it does. 3) Download and install RedMon (see above - it's available in several languages, choose the one that suits you best) Be sure to unzip all the files to %ProgramFiles%\RedMon before installing - redmon doesn't do that by itself when you install it, and we need some files from that directory later on 4) Download and install Sumatra PDF. Do not set it as your default PDF viewer unless this is really what you want. Most users will prefer to use Adobe Reader as the default viewer. 5) Install a new printer: Local Printer, do not scan for PnP devices Create New Port, Redirected Port, RPT1, Manufacturer: Generic*, Type: Generic/Text Only, Name: "PDFQueue". Double-check that it is not set as the standard printer (or you will create an infinite spooler loop), do not share it, and do not print a test page. *If you can't find "Generic" or "Standard", press "Windows Update", if that still doesn't help, pick a common printer model like a HP Color LaserJet. 6) Double-Click the newly created printer Go to Properties, and pick the "Ports" tab. 7) Configure the RPT1: port. Choose Redirection Program: C:\Program Files\Redmon\redrun.exe "Program handles Output" Run: "Hidden" C:\Program Files\SumatraPDF\SumatraPDF.exe -print-to-default -exit-on-print %1 Note that you have to type the language-specific path in *both fields*, say, "C:\Programme\" on a German Windows - substituting %programfiles% doesn't work. 8) add a Firewall exception for Port 515 (may or may not be necessary - if your CUPS server complains that it can't connect and keeps retrying, try the firewall rule) --------------- Preparing the Client (Windows Vista/7 - not for the faint of heart): -------------------------------------------------------------------- 1) Go to Control Panel/Software, Windows Components and install the LPD Print Service (this may require you to insert installation media or point Windows to the folder with the extracted service pack files) 2) Check the Services - The TCP/IP-Print Service should be running and set to start automatically - if not, change it so it does. 3) Download and install RedMon (see above - it's available in several languages, choose the one that suits you best) Be sure to unzip all the files to C:\Program Files\RedMon before installing - redmon doesn't do that by itself when you install it, and we need some files from that directory later on 4) Download and install Sumatra PDF. Do not set it as your default PDF viewer unless this is really what you want. Most users will prefer to use Adobe Reader as the default viewer. Attention users of Windows Vista or Windows 7: You need to run cmd.exe with an administrative account and use the following command to start the "Add Printer Wizard" *from within that cmd session* to make this work! rundll32 printui.dll,PrintUIEntry /il 5) Install a new printer: Local Printer, Create New Port, Redirected Port, RPT1 (If this fails with an error message and you're on Vista/Win7, you didn't pay attention to what I wrote above), Manufacturer: Generic, Type: Generic/Text Only, Name: "PDFQueue". Double-check that it is not set as the standard printer (or you will create an infinite spooler loop), do not share it, and do not print a test page. Attention users of Windows Vista or Windows 7: Do *not* double-click on the newly created printer, rather, double-click the printer named "Microsoft XPS Document Writer". (There is no way to open the PDFQueue printer with admin privileges, and attempting any change to the RedMon settings will result in an error message when pressing OK/Apply) 6) Click on "Printer", "Open as Administrator", then click on "Printer" again, select "Properties", and pick the "Ports" tab. 7) Configure the RPT1: port. Choose Redirection Program: C:\Program Files\Redmon\redrun.exe "Program handles Output" Run: "Hidden" C:\Program Files\SumatraPDF\SumatraPDF.exe -print-to-default -exit-on-print %1 Attention users of Windows Vista or Windows 7: Be sure to re-select "XPSPort:" for the "Microsoft XPS Document Writer" after you're done (or you will disrupt printing to this printer). 8) In contrast to the Windows XP installation, I did not have to change firewall settings. YMMV. --------------- Test: Printing to the CLIENTNAMEHERE_LPD printer should result in a spool file ending up in the PDFQueue on the client, which disappears again shortly after, another spool file in the queue of your default printer on the client, which also dissapears again shortly after, and a print job coming out of your default printer. --------------- Comments welcome, and if somebody decides *where* in our wiki this should go, I'll be happy to add it there with proper formatting. Kind Regards, Stefan PS: I'd still be interested in knowing what's currently going wrong with the X2Go-client's built-in printing support on Windows (see my post at https://lists.berlios.de/pipermail/x2go-dev/2011-December/003133.html) Should be way less of a hassle to configure once it works.

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Client-side printing still not working
by Stefan Baur 20 Dec '11

20 Dec '11

Hi List, I'm still having issues getting client-side printing to work. The server is running Debian Squeeze, with the following X2Go- and CUPS-related packages installed: ii cups 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - server ii cups-bsd 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - BSD commands ii cups-client 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - client programs (SysV) ii cups-common 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - common files ii cups-driver-gutenprint 5.2.6-1 printer drivers for CUPS ii cups-ppdc 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - PPD manipulation utilities ii cups-x2go 3.0.0.3-0~x2go1+squeeze~main~54~build1 X2GO printer for CUPS ii cupsddk 1.4.4-7+squeeze1 Common UNIX Printing System (transitional package) ii cupsys 1.3.8-1+lenny10 Common UNIX Printing System (transitional package) ii cupsys-client 1.3.8-1+lenny10 Common UNIX Printing System (transitional package) ii ghostscript-cups 8.71~dfsg2-9 The GPL Ghostscript PostScript/PDF interpreter - CUPS filters ii hplip-cups 3.10.6-2 HP Linux Printing and Imaging - CUPS Raster driver (hpcups) ii libcups2 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - Core library ii libcupscgi1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - CGI library ii libcupsdriver1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - Driver library ii libcupsimage2 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - Raster image library ii libcupsmime1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - MIME library ii libcupsppdc1 1.4.4-7+squeeze1 Common UNIX Printing System(tm) - PPD manipulation library ii libxcompext3 1:3.5.0-1-0~x2go-bpo1+lenny~main~36~build1 NX X11 protocol compression extensions library ii libxcompshad3 3.5.0-2-0~x2go-bpo1+lenny~main~24~build1 NX shadowing library ii x2go-keyring 2011.12.07+squeeze~main~12~build1 GnuPG keys of X2go developers ii x2goagent 3.5.0.2-0~x2go1+squeeze~main~49~build1 Special X2go-ized X agent, forked from NX-X11 (NoMachine) ii x2goserver 3.0.99.8-0~x2go1+squeeze~main~373~build1 X2go server daemon scripts ii x2goserver-extensions 3.0.99.8-0~x2go1+squeeze~main~373~build1 X2go server daemon scripts (extensions) ii x2goserver-printing 3.0.99.8-0~x2go1+squeeze~main~373~build1 X2go server daemon scripts (printing) I decided not to update the two libxcomp* packages, as they don't seem relevant to the issue and trying to update them means temporarily adding heuler sources, which I'd like to avoid. As you can see, I now have both printing-related packages installed: cups-x2go and x2goserver-printing. I tried adding the printer via the CUPS web interface, and also via the commandline (lpadmin -p "Virtual_X2GO_Printer" -v "cups-x2go:/" -D "Virtual X2GO Printer" -L "local workstation printer" -E -m "lsb/usr/cups-x2go/CUPS-X2GO.ppd"), to see if it makes a difference - it does not. On the client side (Windows 7 Home Premium, German, 32-bit) I installed X2Go Client V. 3.99.0.2. I enabled client-side printing in the session settings, and configured the local default printer in the X2Go Client general settings. I also tried the other options like having the PDF shown instead, or the "save PDF file" option. Nothing happens when I try to print (I tried to print a test page from the CUPS web interface as well as a web page from the browser). CUPS claims to have processed the job, but it goes nowhere. I also tried a Windows XP SP3, German, 32-bit client, with the same settings - same result. :-( Does Client-side printing only work with full desktop sessions? (I only tried it with a single application - the web browser - as I don't have a full DE installed on that server.) What do I have to do to get this working? Kind Regards, Stefan

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