x2go-dev

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5397 discussions

Torn down TCP connections
by --[ UxBoD ]-- 21 Mar '11

21 Mar '11

Hello All, Am facing a problem where the three SSH tcp connections are being torn down. Personally I am using a Cisco router and reflexive ACLs and can see what is happening. I have tried configuring SSHD on the remote server side with the following: TCPKeepAlive no ClientAliveInterval 30 ClientAliveCountMax 3 This appears to have resolved the issue with File&Print but the PulseAudio connection is still being torn down. Have thought about removing the ClientAliveCountMax but why would three attempts fail when I was still connected to my X2go session ? This is so frustrating and cannot believe nobody else has hit it; unless everybody is running it across a LAN ??? -- Thanks, Phil

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Re: [X2go-dev] Wishlist: x2gofeatures query before session start
by Dick Kniep 19 Mar '11

19 Mar '11

Hi Morty, I totally agree with you on this. As a matter of fact we are developing a script that checks serverside whether one is allowed to start a certain command. It uses the normal Linux users and groups and there is also a maintainance option. Within 4 weeks this should be completely finished and I can send you the code together with the patches of the server. As soon as it is ready (and tested) I will send the patch also to Mike and Alex and ask them to incorporate it in the main distribution. But again, it will take some time. Also, in the pyhoca-gui there is a possibility (with some tweeking of the ssh config) to make a connection to the client with a key and after that a logon with a user. Mike has done a wonderful job on that one! Dick Kniep -----Oorspronkelijk bericht----- Van: Moritz Strübe <Moritz.Struebe(a)informatik.uni-erlangen.de> Verzonden: za 19-03-11 19:10:05 Aan: x2go-dev(a)lists.berlios.de; Onderwerp: Re: [X2go-dev] Wishlist: x2gofeatures query before session start Hi Mike, to make this reasonable there must be ways to actually enforce this. Currently a little tweaking of the client will allow you to circumvent any of these rules: Start x2goagent "manually" - the db is only convenience, desktop-mode is client-related only, you can patch the client to start any command you wish, audio is only a matter of setting the right environment variables, etc. Basically x2go is just an optimized x-forwarding. So doing rights-control on this level would be to block the main road and leave the side roads open. While this might be enough for a lot of scenarios it might also let administrators think, that there rules are actually enforced. All in all it would be just as safe as doing all the rights-management in the client.... The right way of doing this, would be to the learn about Linux system administration and use the sufficient tools already provided to you (e.g. ACLs). Everything else creates false feeling of security. Cheers Morty Am 19.03.2011 17:11, Mike Gabriel schrieb: Hi there, Here is a feature request proposal for the post-Baikal release (Rebun): The handshake on session start should be extended in the following way: o login as user o call a script x2gofeatures (or similar) o this script replies with some file format that states - user may / must not start an X2go session - user may / must not start in rootless/desktop mode - available commands to execute (KDE, TERMINAL, /usr/bin/xterm...) - user may / must not print - user may / must not use audio - ... o the client should obey to this returned list of features o if the user tries to hack some feature that he/she is not allowed to use, the server of course also has to deny this feature (and maybe even the whole session) Greets, Mike _______________________________________________ X2go-dev mailing list X2go-dev(a)lists.berlios.de https://lists.berlios.de/mailman/listinfo/x2go-dev !DSPAM:4d84f17d19577730779061!

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Questions about the source
by Tyler Jameson Little 19 Mar '11

19 Mar '11

I am developing a way to pipe NX over HTTP (client and NodeJS server module), and I noticed that x2go is a full-featured solution based on NX technology. I already asked about this on the users mailing list and I was directed here by Mike Gabriel. I'll try to not repeat anything that was already answered. Mike informed me that the x2go team is already developing browser plugins, but I wanted a way to integrate a remote session into a browser using pure HTML5 and JavaScript. Anyway, my question has more to do with the underlying NX server source. Has the x2go team significantly modified the base NX server code? If so, where can I get the full source code for the server (not just the scripts)? Mike led me to this website: http://i4git.informatik.uni-erlangen.de/, but I wasn't able to figure out how to clone the repositories. I don't mean to be too forward, especially since I'm new to this list, but has the x2go team considered using a free code sharing site like GitHub? I will mostly want to be looking at where the data gets sent to the client, but I'm not sure where the best place to look for that would be. Thank you so much for your help!

4 6

auth.log grows
by tony.blue.mailinglist＠gmx.de 19 Mar '11

19 Mar '11

Hello Mailinglist, x2goserver-home grows my auth.log-file. Continious I geth the following messages: ... Mar 6 06:40:02 servername sudo: root : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/x2gopgwrapper listsessionsroot servername Mar 6 06:40:29 servername sudo: last message repeated 5 times Mar 6 06:40:29 servername CRON[5578]: pam_unix(cron:session): session closed for user munin Mar 6 06:40:32 servername sudo: root : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/x2gopgwrapper listsessionsroot servername Mar 6 06:41:37 servername sudo: last message repeated 13 times ... My system: ubuntu-server with debian x2go-packages. Thank you! -- NEU: FreePhone - kostenlos mobil telefonieren und surfen! Jetzt informieren: http://www.gmx.net/de/go/freephone

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Re: [X2go-dev] [X2go-user] Question about the source
by Mike Gabriel 19 Mar '11

19 Mar '11

Hi Tyler, I will divert this posting to x2go-dev(a)lists.berlios.de. Please let us continue the discussion there. On Sa 19 Mär 2011 03:24:51 CET Tyler Jameson Little wrote: > I downloaded a copy of the source by using this command: git clone git:// > code.x2go.org/x2goserver.git The site is still under construction. The package has been uploaded for evaluation by two guys from university of Erlangen, Germany. For now, please refer to their Git site for the other packages (x2goagent, nxlibs etc.): http://i4git.informatik.uni-erlangen.de > I want to try to make a module on NodeJS, and I had assumed that I would get > a bunch of source files written in C or C++, but what I got was a bunch of > Perl scripts. > > Is that all the server is? Am I missing something? My goal is to make an > NX server that can run over a simple TCP or HTTP server and I was going to > write a client for display in the browser. The X2go developers are already working on a QtPlugin based browser plugin. Maybe you should take a look at that. Code is included in the x2goclient project: http://i4git.informatik.uni-erlangen.de/x2goclient.git/ > From my research, X2Go is > supposed to be the most fully featured, open source NX implementation out > there. I downloaded the source from NoMachine.com for part of their server > and it was as I expected, a bunch of C and C++ sources. > > With NodeJS, I have a couple of options: > > - Include a C++ module by exporting certain functions > - Write the source in server-side JavaScript > - Use the exec command to execute scripts on the command-line > > > If the server really is that simple, then my project will be a lot less > painful and will take me a lot less time than expected to make work with > NodeJS. If the server really is this simple, how does it compare > performance-wise with the open source version from NoMachine? I want to > possibly have several NX servers piped through a single webserver where each > NX server is running in it's own VM, so efficiency is what I'm after. I am > primarily looking at just running this on Ubuntu, so this package looked > like it was the right one (debian). For Ubuntu there is the development ppa of university of Erlangen: https://launchpad.net/~siretart/+archive/x2go > Any help that any of you could offer would be much appreciated. I'm excited > to start playing with this software!! Don't worry, anything I produce will > be Open Source, regardless of whether I do a complete rewrite. Note that most of components of X2go will become AGPL (http://www.gnu.org/licenses/agpl.html) before the next release (,,Baikal''). 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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Bug: xmodmap should be set by client
by Moritz Struebe 18 Mar '11

18 Mar '11

Hi there, I just had some trouble with my alt-gr-key. There reason was, that after the update to squeeze the server had a different xmodmap then my client ( http://daniel-lange.com/archives/45-Fixing-FreeNX-NoMachine-NX-keyboard-gli…) . Probably it would be a good idea if the x2go-server-client makes sure the server-Xserver has the same xmodmap as the client-Xserver. Any other Ideas or comments? Cheers Morty -- Dipl.-Ing. Moritz 'Morty' Struebe (Wissenschaftlicher Mitarbeiter) Lehrstuhl für Informatik 4 (Verteilte Systeme und Betriebssysteme) Friedrich-Alexander-Universität Erlangen-Nürnberg Martensstr. 1 91058 Erlangen Tel : +49 9131 85-25419 Fax : +49 9131 85-28732 eMail : struebe(a)informatik.uni-erlangen.de WWW : http://www4.informatik.uni-erlangen.de/~morty

1 0

Connection to localhost
by Manovel 15 Mar '11

15 Mar '11

Hi everybody, I wanted to know what's the status on the problem by connecting to localhost, any news? Thank you, manovel

5 7

vacation
by Heinz-M. Graesing 14 Mar '11

14 Mar '11

hello list members, I just want to inform you that Alex is on vacation this week and I'll be unavailable for the coming next two weeks. After our vacation we'll try to publish a roadmap including the features of the new version. As you all know there have been huge changes made to the planned release so please don't expect the final version in the next 4 weeks. As far as we can tell now, we'll change the licence of our core components (x2goclient, x2goserver) to the AGPL licence. The licence of all used code of other projects will stay untouched of cause. Our wiki is used by more and more people and it will become our main documentation platform. The needed static websites will moved to the blog, so that there will be only two web platforms left (redirections will save the existing links). Regards, Heinz

2 1

libssh and keep alive
by --[ UxBoD ]-- 14 Mar '11

14 Mar '11

Alex/Heinz, with the latest x2go clients using libssh2 have keep alive packets been enabled as according to http://trac.libssh2.org/wiki/KeepAlive they are off by default. I have noticed my sound and spool directory keeps disappearing and wondering whether this is what the cause is. -- Thanks, Phil

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Re: [X2go-dev] x2go on Android ?
by brian mullan 11 Mar '11

11 Mar '11

I think Tablets are going to be a huge opportunity for x2go. Unless the tablet allows some linux to be installed on it to replace Android -or- comes with linux the ability to run an xserver & x2go will be a good Plan B

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