x2go-user January 2017

x2go-user@lists.x2go.org

18 participants
19 discussions

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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Emacs crashes on start
by Roderick Johnstone 18 Sep '17

18 Sep '17

Hi I'm connecting from a Mac (X2Go Client v. 4.0.5.1 (Qt - 4.8.7)) to Fedora 24 with a xfce session using the x2goserver-4.0.1.19-11.fc24.x86_64 packages from the fedora repos. On starting emacs, I get the error below. This issue seems to have been around for a while in similar forms, but didn't affect me under Fedora 22. Is anyone in a position to confirm this issue on Fedora 24 and suggest a work around? I tried setting various environment variables suggested on various web pages for similar issues and in the bug report noted in the error message (and checked /etc/PROBLEMS), but nothing was effective. emacs starts fine in an xfce session at the console. Thanks Roderick Johnstone X protocol error: BadRequest (invalid request code or no such operation) on protocol request 131 When compiled with GTK, Emacs cannot recover from X disconnects. This is a GTK bug: https://bugzilla.gnome.org/show_bug.cgi?id=85715 For details, see etc/PROBLEMS. Fatal error 6: Aborted Backtrace: emacs[0x50ad3c] emacs[0x4f11ec] emacs[0x50ade3] emacs[0x4c0f60] emacs[0x4c58b6] emacs[0x4c593b] /lib64/libX11.so.6(_XError+0x12d)[0x2b5baa0ff57d] /lib64/libX11.so.6(+0x413e7)[0x2b5baa0fc3e7] /lib64/libX11.so.6(+0x414ad)[0x2b5baa0fc4ad] /lib64/libX11.so.6(_XReply+0x238)[0x2b5baa0fd478] /lib64/libX11.so.6(XQueryPointer+0x91)[0x2b5baa0f3351] /lib64/libgdk-3.so.0(+0x4da2a)[0x2b5ba8150a2a] /lib64/libgdk-3.so.0(+0x6a605)[0x2b5ba816d605] /lib64/libgdk-3.so.0(gdk_window_get_device_position_double+0x10b)[0x2b5ba8143d1b] /lib64/libgdk-3.so.0(gdk_window_get_device_position+0x2d)[0x2b5ba8143e1d] /lib64/libgtk-3.so.0(+0x321199)[0x2b5ba7b48199] /lib64/libgtk-3.so.0(+0x3216f4)[0x2b5ba7b486f4] /lib64/libgdk-3.so.0(+0x253d8)[0x2b5ba81283d8] /lib64/libglib-2.0.so.0(+0x4a173)[0x2b5ba97d0173] /lib64/libglib-2.0.so.0(g_main_context_dispatch+0x163)[0x2b5ba97cf703] emacs[0x5e0b78] emacs[0x5a6025] emacs[0x4fc1bc] emacs[0x4fdfdd] emacs[0x4ffc24] emacs[0x564642] emacs[0x4f16b4] emacs[0x5645e3] emacs[0x4f1670] emacs[0x4f5e6b] emacs[0x4f61c8] emacs[0x419b52] /lib64/libc.so.6(__libc_start_main+0xf1)[0x2b5bb17db731] emacs[0x41a639] Aborted (core dumped)

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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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multiwindow option and resizing an application window
by Dionne, Dennis P 09 Mar '17

09 Mar '17

Hello, I am using X2Go on RHEL 6.7 and I am very pleased with how well it works but I am having an issue when using X2Go with a custom application when I resize the application window. There are hundreds of other applications on our system that have no issue with resizing, it' just this one. This will happen every time I resize the app IF AND ONLY IF I start vcxsrv with "-multiwindow", if I start it any other way (-rootless, -fullscreen, -multimonitor) the app will resize fine. The problem is I then cannot resize the session window (resizing is only available in multiwindow mode apparently?). I am 100% aware that the application in question is at fault, however, it is very old, was produced by another company that will not give me the code and refuses to update it... I am also aware that this may be a VCXSrv issue and I can ask them as well but I was wondering if you all had run across something like this before. If you could give me some background on the differences between multiwindow vs "non-multiwindow" or could explain why multiwindow would fail I'd appreciate it. That may be a question for VCXSrv though. Setup: RHEL 6.7 X2Go Windows Client 4.0.5.1 (Windows 7 64bit) Server 4.0.1.19 Gnome 2.28 Thanks Dennis

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Heads-Up: Upcoming X2GoClient 4.1.0.0 Release / Sponsorship of X2Go macOS Client Development
by Stefan Baur 20 Feb '17

20 Feb '17

Hi everyone, a few days ago, Mihai (ionic) posted a call for translations to <x2go-i18n(a)lists.x2go.org>, in which he mentioned that he intends to have X2GoClient 4.1.0.0 release-ready around 2017-02-09. Key new features/bugfixes of this upcoming release are: - PulseAudio Support on macOS - updated SSHD handling for the client-side SSHD required for file and print sharing - fix for the "key error" messages also relating to SSHD that may have kept file and print sharing from working, esp. on Windows A full list of features and bugfixes will be published by Mihai once the official release takes place. This message is so you can plan ahead and find a spot in your personal schedule where you might want to download, test, and deploy the new client. I would also like to use this opportunity to introduce a new sponsor, CFD.direct. CFD Direct <http://cfd.direct> are the primary developers of OpenFOAM <http://openfoam.org>, the free, open source software for computational fluid dynamics. We received 1000 EUR from them as an initial payment, along with a statement that they intend to fund the project annually with a fixed percentage of their cloud revenue. Our plan is to use this money to rent a virtual macOS system running a current version of macOS, and add this as a Jenkins slave to our current build infrastructure. That way, creating new X2GoClient builds for macOS will be a lot easier (automated, nightly builds etc.). Due to personal vacation time, this will probably not happen before early April 2017, though with a little bit of luck we can start as early as Mid-February. Long story short: Especially if you're a macOS user, please give X2GoClient 4.1.0.0 a try once it's officially released, and report back any bugs with it on our bugtracker. Instructions on how to report bugs can be found here: http://wiki.x2go.org/doku.php/wiki:bugs#reporting_bugs If you feel like replying to this message, please DO NOT hit "reply to all". Instead, please respect the "Reply-To" header field and send your reply *only* to <x2go-project(a)lists.x2go.org>. Kind Regards, Stefan Baur -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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No USB-automount using TCE-Live
by Kugelblitz 07 Feb '17

07 Feb '17

Hello, I just installed the TCE-live environment in our existing X2go envrionment (under Debian jessie), works fine except of the usb-automount. It seems to me as if nothing like x2gousbmount is installed on the image. Any hints? Thanks Torsten -- Kugelblitz - Räder für Kinder Inhaberin: Sophie Flückiger Schwarzwaldstraße 99 79117 Freiburg Tel 0761-1207597 www.kugelblitz-kinderraeder.de Öffnungszeiten: Di-Fr 10-13 u. 15-19 Uhr, Sa 10-18 Uhr

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x2go performance again
by Stefan Seidel 31 Jan '17

31 Jan '17

Hi, some time ago I inquired about peoples experience with x2go in a LAN environment. I have now built a TCE live system (TFTP-only, no NFS) and a new Jessie server and I am still not very satisfied. I tried almost all available options. Here is the setup: 1GBit/s LAN on both sides Host: AMD 4.4GHz 8-core CPU with 32GB RAM Client: Pentium D 2.8GHz, 1GB RAM, nVidia 6200 with 2 screens@1200x1600 I tested MATE desktop with Firefox 51 (tried XRender on/off) and Chromium 55. I usually set the browser to fill half of the screen, that mean roughly the same number of pixels as a Full-HD (1920x1080) screen. I usually open https://www.heise.de and scroll up and down a bit. nopack: almost the best of it all, responsiveness good, Chrome and Firefox without XRender laggy rfb-hextile/tight: better for small screen updates, worse for large screen updates, scrolling in Firefox with XRender active is *very* smooth rdp: almost identical to rfb adaptive: middle ground, everything is laggy but at least there's always the same amount of lag for small and big screen updates. Unacceptable though because almost all text has JPEG artifacts no matter whether the quality is set to 1, 7 or 9. Graphics like Munin graphs are really ugly. 16m-png: good quality, mostly lag-free except Chrome and Firefox when XRender is off, becomes very unresponsive with lots of screen updates 16m-jpeg: artifacts, speed like adaptive I believe nopack or rfb would give better performance if it was possible to circumvent going through SSH. I have set SSH to use arcfour (this is a trusted, isolated LAN) and performance has been slightly better. Is there any way of making the initial authentication and startup through SSH but then having the NX connection going directly to the client? That would save a lot of processing power! (I'm thinking similar to the "tunnel" feature for sound.) Regards, Stefan

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OpenSuse
by Robert Dinse 26 Jan '17

26 Jan '17

The source of the stty turned out to be in my own .bashrc, don't know how I managed to miss it or why it did not stop x2go from working on any other distribution (centos 6/7, SL 6/7, debian, mint, ubuntu), all of those distributions worked in spite of it. Also don't know why .bashrc was sourced when my normal login shell is ksh. -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 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.

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Transport endpoint is not connected? RE: Shared Folders, from Windows to Debian8
by KARL A. WOELFER 26 Jan '17

26 Jan '17

Thank you again Stefan for the more detailed instructions, I am ~closer. I selected automount for one folder on my WIndows client, "Benchmarking" >From X2go, on the Debian 8 server side I see : lrwxrwxrwx 1 kw* kw* 25 Jan 25 12:49 media -> /tmp/.x2go-kw*/media kw*@chdd:~/media$ cd disk kw*@chdd:~/media/disk$ ls -alrt ls: cannot access _mnt_home_kw*_.x2go_ssh_key.Ja4672__cygdrive_C_Users_KARLWO1_DOCUME1_BENCHM1: Transport endpoint is not connected total 8 d????????? ? ? ? ? ? _mnt_home_kw*_.x2go_ssh_key.Ja4672__cygdrive_C_Users_KARLWO1_DOCUME1_BENCHM1 (??? above are the Unix file attributes) This directory entry then goes away. kw*@chdd:~/media/disk$ ls -alrt /tmp/.x2go-kw*/media/disk total 8 drwx------ 5 kw* kw* 4096 Jan 25 13:03 .. drwx------ 2 kw* kw* 4096 Jan 25 13:04 . Transport endpoint not connected doesn't sound good, but I don't know what to do with this information. I also don't know the significance of the _mnt_home_kw*_.x2go_ssh_key.Ja4672__ which precedes the _cygdrive_ name that we are expecting. Is there something more I should have installed/running (Cygwin for example) on my Windows 7 laptop? X2go client is version 4.0.5.0 (Qt 4.8.6) Thanks for any and all help with this, - Karl ________________________________ De : Stefan Baur <x2go-ml-1(a)baur-itcs.de> Envoyé : mercredi 25 janvier 2017 11:08 À : x2go-user(a)lists.x2go.org Objet : Re: [X2Go-User] Shared Folders, from Windows to Debian8 Am 24.01.2017 um 22:49 schrieb KARL A. WOELFER: > Thanks for the quick reply Stefan, > > My Windows 7 is running X2Go Client v 4.0.5.0 (Qt - 4.8.6) > > > I am taking the defaults in Shared Folders (did not check the Automount box, > > or the Filename Encoding box. > > > Where will I expect to find the shared C:\Users\Karl ... Windows folder > I am sharing on the Linux side? Well, if you don't check the automount box - nowhere until you mount them? How you mount them manually depends on what checkboxes you checked under Options/Settings/General. 1a) If you set X2GoClient to minimize into the system tray, then you right-click that icon, select the session name, then "Share folder ...". 1b) If, instead, you have the X2GoClient window on your screen even with an active connection, click on the small folder icon, that's the left of the three icons "Folder, Pause, Power". >From there, the steps are the same again for both variants. 2) Click the name of the share in the window that has opened now 3) Click the "share" button. If you either performed these steps or had the automount box checked, your mountpoint will be somewhere under ~/media/disk/, with a name starting with _cygdrive_. > My Windows laptop has a single-user authentication, whereas we use LDAP > on Linux, is this a potential problem? I do not believe so. The mount is performed by FUSE through a tunneled SSH connection, with the Cygwin SSHD spawning on your client, so it's your server connecting back to the client, using a temporary SSH key pair, so there's no exchange of your individual password involved. I'll try to come up with a HowTo with a few screenshots, but at present, my only Windows machine that has a US-English GUI is busy spinning its hourglass over the Windows Update window ... which is not surprising, as this was the first time since Mid-2014 that I powered it up. -Stefan -- BAUR-ITCS UG (haftungsbeschränkt) Geschäftsführer: Stefan Baur Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364 Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243

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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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x2go-user January 2017