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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 >>

3 3

suspended sessions are not restoring
by David Barron 12 Nov '18

12 Nov '18

My problems with suspended sessions are continuing, so I am forced to continue requesting help. Of course, I'm using -broker-url with the client, but if I do not and I create my sessions, they suspend perfectly. So whatever the issue is, it appears to be related to broker. Any help would be appreciated.

2 1

X2Go: The Gathering 2018 Livestream
by Stefan Baur 10 Nov '18

10 Nov '18

Hi $LIST, We are trying to livestream this year's talks via: <https://www.youtube.com/channel/UCQHaEa8JQDa9hMI1bc3oq8A/live> Please let us know if you have any trouble viewing the stream. Streaming will start at 10:00am CET. 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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suspended sessions are not restoring
by David Barron 06 Nov '18

06 Nov '18

I mentioned this problem last week and went back and forth a few times but there was no resolution. Since I am being paid to implement this I have no choice but to bring it up again. My apologies. I have the broker running on a login server and my applications running on 3 x2go servers. Everything is working fine except for this one thing. I can suspend a session, and when I run x2golistsessions I am seeing the suspended sessions in the database. But when I run the same application the suspended session is not starting up, I am getting a new one. I can verify that because if I run x2golistsessions while the new session is running I see two sessions in the database. I've tried taking two of my application servers out of the picture and limiting it to 1, but I still see the same thing. I've got PostgreSQL running on my broker server, and all the application servers access it without a problem. At least I can run x2golistsessions on all three without a problem. If it matters, after running x2goversion on the application servers I'm seeing this x2goserver: 4.1.0.0 x2goserver-common: 4.1.0.0 x2goserver-extensions: 4.1.0.0 x2goserver-x2goagent: 3.5.99.16 x2goserver-xsession: 4.1.0.0 And on the broker server I see this X2goserver: 4.1.0.2 X2goserver-common: 4.1.0.2 X2goserver-extensions: 4.1.0.2 X2goserver-x2goagent: 3.5.99.16 X2goserver-xsession: 4.1.0.2 Any suggestions would be appreciated.

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Broker and resuming sessions
by David Barron 01 Nov '18

01 Nov '18

First a little explanation of the architecture. The login server load balances sessions between 3 servers where the actual applications run. That part is working fine. The problem is when I suspend a session instead of ending it. My understanding was that if I chose the same session profile it would resume my application at the same point. That's not what I'm seeing. First, when I run x2golistsessions it does not show my currently running session. Then if I suspend the session I still don't see it listed. I've checked it on all three of the servers. Then when I run the same session it is starting a new one rather than resuming. Well, I guess it can't do anything else since my session isn't stored. Can I suspend a session in this kind of environment? The documentation seems to say I can. Is there something special I have to do in the client to get it working? Currently the only command line option I am using with the client is -broker-url=http://<hostmane>:8080/plain/inifile Should I use something else? Thanks architects of vision and strategy for business intelligence David Barron Senior Consultant Zencos Consulting: david.barron(a)zencos.com [www.zencos.com]<http://www.zencos.com/> work: 919-480-2761 mobile: 919-995-2356 fax: 919-287-2335 The information in this e-mail and any attached files is confidential. It is intended solely for the use of the addressee. Any unauthorized disclosure or use is prohibited. If you are not the intended recipient of the message, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. The views of the author may not necessarily reflect those of the company.

2 10

x2goclient on openSUSE Tumbleweed
by Giacomo Rossi 28 Oct '18

28 Oct '18

I'm trying to install x2goclient on openSUSE Tumbleweed following the official x2go guide that can be found here: https://wiki.x2go.org/doku.php/wiki:repositories:suse After adding the repo, I do a "zypper refresh" followed by a "zypper install x2goclient" but unfortunately the installation cannot proceed because I obtain the following error: "Problem: nothing provides libssh.so.4(LIBSSH_0.7.2)(64bit) needed by x2goclient-4.1.1.1-1.6.x86_64 Solution 1: do not install x2goclient-4.1.1.1-1.6.x86_64 Solution 2: break x2goclient-4.1.1.1-1.6.x86_64 by ignoring some of its dependencies Choose from above solutions by number or cancel [1/2/c] (c):" Is there a way to solve this? Both libssh4 and libssh-devel versions installed on the system are 0.8.3-1.1. Tell me if I've to provide further informations. Regards, Giacomo Rossi A bad day freediving or spearfishing is better than the best day at work

2 2

Matlab in X2go
by Thackeray, Neil L 24 Oct '18

24 Oct '18

I'm having some issues using Matlab2018a in X2go. When using xfce4 (and KDE) desktop it causes some exception when the X2go window is hidden or resized. It also will hide all of the button widgets in Matlab until I mouse over them. When I change the session type to 'Single Application: Terminal', and then typing 'matlab &' in the terminal it works perfectly fine. This is the exception that Matlab throws, usually many times: Exception in thread "AWT-EventQueue-0": java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData at sun.java2d.xr.XRPMBlitLoops.cacheToTmpSurface(XRPMBlitLoops.java:148) at sun.java2d.xr.XrSwToPMBlit.Blit(XRPMBlitLoops.java:356) at sun.java2d.pipe.DrawImage.blitSurfaceData(DrawImage.java:959) at sun.java2d.pipe.DrawImage.renderImageCopy(DrawImage.java:577) at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:67) at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:1014) at sun.java2d.pipe.ValidatePipe.copyImage(ValidatePipe.java:186) at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3318) at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3296) at javax.swing.ImageIcon.paintIcon(ImageIcon.java:425) at com.mathworks.toolstrip.plaf.GalleryButtonUI.paintContent(GalleryButtonUI.java:115) at com.mathworks.toolstrip.plaf.RegularButtonUI.paintContent(RegularButtonUI.java:65) at com.mathworks.toolstrip.plaf.ToolstripButtonUI.paint(ToolstripButtonUI.java:198) at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161) at javax.swing.JComponent.paintComponent(JComponent.java:780) at com.mathworks.mwswing.MJButton.paintComponent(MJButton.java:432) at javax.swing.JComponent.paint(JComponent.java:1056) at com.mathworks.mwswing.MJButton.paint(MJButton.java:410) at javax.swing.JComponent.paintChildren(JComponent.java:889) at javax.swing.JComponent.paint(JComponent.java:1065) at javax.swing.JComponent.paintChildren(JComponent.java:889) at javax.swing.JComponent.paint(JComponent.java:1065) at javax.swing.JComponent.paintChildren(JComponent.java:889) at javax.swing.JComponent.paint(JComponent.java:1065) at javax.swing.JComponent.paintChildren(JComponent.java:889) at javax.swing.JComponent.paint(JComponent.java:1065) at javax.swing.JComponent.paintToOffscreen(JComponent.java:5210) at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1579) at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1502) at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:306) at javax.swing.RepaintManager.paint(RepaintManager.java:1272) at javax.swing.JComponent._paintImmediately(JComponent.java:5158) at javax.swing.JComponent.paintImmediately(JComponent.java:4969) at javax.swing.RepaintManager$4.run(RepaintManager.java:831) at javax.swing.RepaintManager$4.run(RepaintManager.java:814) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789) at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738) at javax.swing.RepaintManager.access$1200(RepaintManager.java:64) at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:726) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

2 2

Cosmic Cuttlefish Nightly Repo
by Robert Dinse 23 Oct '18

23 Oct '18

We wondering if there was any chance at a Nightly Builds repo for Cosmic Cuttlefish Ubuntu 18,10? -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 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.

1 0

Problem connecting via intermediate site
by Chris Green 23 Oct '18

23 Oct '18

I have x2go working perfectly OK when connecting across my LAN, so the basics are OK. However it doesn't work when connecting my laptop when I'm away from home (i.e. not on the LAN). When I'm away from home I connect via an intermediate site to my home system, i.e. in my ~/.ssh/config file I have the following:- # # # esprimo may be remote or local # Match host esprimo exec "hostNotLocal esprimo" ForwardX11 true ProxyCommand ssh cheddar nc -q0 zbmc.eu 22 host esprimo ForwardX11 true So when I'm not on the home LAN I connect via 'cheddar' to my home machine. Can I get x2go to do the same thing somehow? Or, even better, can I get x2go to use a connection already set up by ssh in 'ControlMaster' mode? -- Chris Green

3 7

TCE-Live
by Bronko 22 Oct '18

22 Oct '18

Hi, ( Sorry for resending due to a mistake in format...) I'm going to setup a PC Pool of about 40 clients to use X2go TCE. The last wiki changes on TCE-Live are from February ("This page is very much Work in Progess."). Should I start by the traditional way, so called TCE-Classic? Thanks for your response in advance. Best, Jens

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