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5397 discussions

Shared print server for multiple X2Go Servers
by John A. Sullivan III 02 Mar '10

02 Mar '10

Hello, all. We were hoping to run a central print server for potentially hundreds of X2Go Servers. However, we found that the print server cups-x2go driver did not send the print job to the X2Go Server unless we changed the x2goserver setting in cups-x2go.conf from local to the specific x2go server. From a brief look at the cups-x2go backend, this seems to be the expected behavior. How would one share a print server among multiple x2go servers? Thanks - John

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Session Status flags
by John A. Sullivan III 02 Mar '10

02 Mar '10

Hello, all. I'm trying to dissect and document the X2Go session setup and management. What do the various session status flags mean? I assume R is running and S is suspended. What is F? Are there any other flags? Thanks - John

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Process documentation
by John A. Sullivan III 28 Feb '10

28 Feb '10

Hello, all. We're finally headlong into refining our X2Go deployment and turning up lots of little issues. We're perfectly happy to dig through the scripts and even submit any patches we make rather than pester the list for each issue. However, is there any documentation outlining what the steps are in the process of setting up and tearing down an X2Go session? That would save us wading through all the scripts to see how their strung together. For example, we're seeing a problem where our local file and print mounts are not being removed when a session is terminated. We'll just work our way through the process to see what we have set up wrong but would like to know what that process is. I took a quick look on the X2Go web site, the berliosz site, and the repository but nothing jumped out at me other than to download all the packages and start reading through them. Thanks - John

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Re: [X2go-dev] RDP Connections on x2go Client
by John A. Sullivan III 25 Feb '10

25 Feb '10

On Wed, 2010-02-24 at 23:45 -0700, Dimitris Anogiatis wrote: > <snip> > > > John, > > > > > > you're close but no cigar yet. > > > > > > Let me attempt to explain again. > > > > > > Assume that x2goserver is running on Debian Lenny with an IP > of > > 192.168.0.10 > > Also assume that Virtualbox is running the XP virtual > machine with an > > IP of 192.168.0.109 > > > > > > here's what i do in steps > > > > > > 1) I turn on my laptop and boot into windows vista (IP > 192.168.0.130) > > 2) I load Remote Desktop Connection > > 3) I type in the username & password, press enter and I can > connect to > > the Windows XP virtual machine (on 192.168.0.109). > > 4) I then log off of Windows XP. > > > > > > Now that I know that RDP works I'm trying to do the same > with the x2go > > client that I installed on Windows Vista. > > > > > > 1) I load the x2goclient (for windows) on my laptop > (192.168.0.130) > > 2) I make a new session named Virtualbox XP > > 3) Host: 192.168.0.109 > > 4) Login: the same username I have on XP > > 5) SSH Port: 3389 (this, I think is most likely the problem > area cause > > RDP doesn't use ssh) > > 6) Session Type: Connect to Windows terminal server > Server: > > 192.168.0.109 (Not sure if this is correct but it's the same > IP as the > > host) > > 7) I press OK set the password, press OK and I'm waiting for > it to > > connect > > 8) An error message pops up "Connection Failed > 192.168.0.109: > > ssh_exchange_identification: read: Software caused > connection abort" > > > > > > and That's all. Same thing happens when I reboot the > computer and > > load xubuntu. > > > > > > I can connect to the vm using Remotedesktop-Client (a gui of > rdesktop) > > but x2goclient-gtk on xubuntu reports the same error. > > > > > > For other kinds of sessions i.e. Gnome, LXDE sessions (Not > using KDE) > > and single application sessions, x2goclient on both > platforms works > > like a charm. > > > > > > Does anyone know what I'm doing wrong guys? or is it a bug > that needs > > squashing? > > > > > > Thanks for all your help in advance > > > > > > Regards > > Dimitris > > Ah, now I see what you're doing but I'm not sure why you are > doing it. > Perhaps this is because I'm not familiar with using the > terminal server > session type. I think you are misusing it but my experience > is not > based upon X2Go server. > > I believe the terminal server option is not used for > connecting the > x2goclient to a terminal server. x2goclient does not "speak" > RDP as far > as I know, only NX. Instead, what it does is connect to the > X2GoServer > running on the Lenny server and then, instead of launching > startkde or > gnomesession, it starts rdesktop to connect to a terminal > server. The > important point is that the x2goclient is not connecting > directly to the > RDP server; it is connecting directly to the X2GoServer which > then > established an RDP connection to the Windows server. At > least, that's > how I think it works in NoMachine. I really don't know about > X2Go. > Sorry I can't be more authoritative - John > > Thank you John, > > What you described on your last reply worked just fine... I was going > at it > the wrong way. As you described everything happens on the x2goserver. > I was under the impression that x2goclient talks directly to the RDP > server. > > Thank you very much > > Regards, > Dimitris Hi, Dimitris. I'm glad it finally sorted. I've cc'd the list just in case someone else interprets the terminal server option the same way. Thanks for your patience working through it - John

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RDP Connections on x2go Client
by Dimitris Anogiatis 24 Feb '10

24 Feb '10

Dear x2go team, First of all, congratulations for an awesome project. Keep up the great work :) I recently tried to create via the x2go client, an RDP connection to a Virtual Machine running Windows XP. I was unsuccessful; the client insists on using SSH (port 22 on the windows client and whatever port you have set it up on the GTK client). Perhaps a checkbox labeled "RDP over SSH" might be a good option to have in later versions of the clients or perhaps you could turn the SSH port field into an RDP port field once that type of connection is selected. I also noticed that the Windows Client does not go to fullscreen mode even though the session is set to fullscreen. Perhaps that too can be addressed in later versions of the client. It's great to see projects like yours flourish and mature into invaluable tools. Keep up the great work. If you allow me to contribute to the project I would like to get the .ts file so I can translate x2go to my native language (Greek) unless you already have it translated into Greek. Kind Regards Dimitris Anogiatis

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Shared DB patches
by John A. Sullivan III 21 Feb '10

21 Feb '10

Hello, all. It looks like the line numbers in x2gopgwrapper_net have changed since I last submitted these patches. These patches have successfully applied to the latest repository files. To review what they are for, we felt uncomfortable both with giving our client desktops ssh access to the single database server and having them use the postgres super user to access the database. In our multi-tenant environment with many vserver based X2Go Servers (one X2Go Server per virtual machine), this was a dangerous security exposure especially since the PostgreSQL server holds databases besides the X2Go databases. There is an OpenOffice document included which explains the logic and the procedures for implementing this secure shared database setup. It eliminates both the need for ssh and to use the postgres user. Hope they help someone else - John

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Central CUPS server not sending print jobs to physical desktop
by John A. Sullivan III 18 Feb '10

18 Feb '10

Hello, all. We finally have our central CUPS server running after learning more than we ever wanted to know about NSS, LDAP, groups, and CUPS authentication! The CUPS server is running on Lenny and we have installed cups-x2go. We have NOT installed x2goprint as it our understanding from reading the documentation that it is not necessary on the CUPS server but only on the X2Go Server. Is this correct? We edited the client's .kdeprintrc file to point to the central cups server. The client does have x2goprint installed and both the user and x2goprint are members of the fuse group. The client uses a non-standard SSH port for security reasons. We restrict access to the desktop printers to the desktop users. Only I can print to my desktop printer and only Susie can print to Susie's desktop printer. When we print on the client to the X2Go-CUPS printer, the print job shows as successful but the print dialog never appears on the physical desktop. The CUPS logs show a successful print job but no popup. We have set up dsa key access. If we do a ssh -i /root/.x2go/ssh/.x2goprint/id_dsa x2goprint@<virtual desktop>, it works - we open an ssh console without being prompted. We have accepted the keys into the known_hosts file for both the short and fully qualified name. The strange thing is that a packet trace shows no SSH traffic. There is plenty of CUPS traffic but the CUPS server never tries to communicate with the virtual desktop via SSH. If we use a local CUPS server instead, the X2Go print popup works just fine - very impressive. We have tried the setup with the local CUPS server both enabled and disabled. No difference. What have we missed? Why does the central CUPS server not even try to send the job to the virtual desktop? How can we troubleshoot it further? We see nothing suspicious in the logs including the auth logs. Thanks - John

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x2gocleansessions and x2goprint
by jasper van der marel 16 Feb '10

16 Feb '10

Hi, I have two questions about x2gocleansessions and x2goprint. x2gocleansessions is the deamon which runs in the background (daemon) and runs every 30 seconds. Why the 30 seconds ? Can the interval be raised (I see a 30sec statement in the perl script so I assume it is possible). The reason for asking is the fact I see a lot of x2gocleansession processes running on the server. The second question is abount x2goprint. When printing the cups print jobs are being saved in the / of the system. Which script/command must be adjusted to save the cups print jobs in eq /tmp or /var/spool/x2goprint ? Many thanks in advance, Jasper van der Marel Stone-IT

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x2go print settings
by jasper van der marel 12 Feb '10

12 Feb '10

Hi, When printing to the x2go-cups printer the cups jobs will be placed in / (eg /50-jvandermarel-cupsjob16168) Which config file must be adjusted so the jobs can be placed in eg /tmp ? Thanks in advance, Jasper van der Marel Stone-IT

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Windows client hangs after screen saver starts
by John A. Sullivan III 11 Feb '10

11 Feb '10

I'm running X2GoClient 3.0.1-4 on WindowsXP home. If I walk away from my X2Go desktop for an extended period of time, when I stop the Windows screen saver, the X2Go screen is completely white and refuses to close; it must be forcibly closed. I've tried moving the mouse and typing the screensaver password on the remote system but that did not work. If I let Windows go to screen saver and then immediately end the screen saver, I do not have this problem. Killing the process seems to be stopping xming. Is this a known issue? Where should I be looking for data to troubleshoot? Thanks - John

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