On 4/10/23 12:09, Orion Poplawski wrote: > On 12/5/19 05:02, Sorin T wrote: >> Package: x2goclient >> Version: 4.1.2.1 >> >> >> This output is shown continuously. I have also disabled the Media and the Shared folders options. >> >> [2019/12/05 12:21:49.755356, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:49.844514, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:49.844968, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:50.345651, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:50.846330, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:51.347011, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:51.354536, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:51.355837, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:51.358011, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:51.858687, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:52.359381, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:52.860074, 1] ssh_channel_accept: No channel request of this >> type from server >> [2019/12/05 12:21:53.360787, 1] ssh_channel_accept: No channel request of this >> type from server >> >> It could be a ssh config problem ? I am using on client machine: >> OpenSSH_8.1p1, OpenSSL 1.1.1d  10 Sep 2019 >> >> Guest OS: Debian based >> Guest ssh version: OpenSSH_7.9p1 Debian-10, OpenSSL 1.1.1d  10 Sep 2019 >> Guest x2goserver: 4.1.0.3-4 > > > I'm seeing the same thing. > > Client: > AlmaLinux 8.7 > x2goclient-4.1.2.2-1.el8.x86_64 > libssh-0.9.6-3.el8.x86_64 > > Server: > Either EL7/8 > openssh-7.4p1-22.el7_9.x86_64 > x2goserver-4.1.0.3-9.el7.x86_64 > > openssh-8.0p1-17.el8_7.x86_64 > x2goserver-4.1.0.3-17.el8.1.x86_64 > > x2goclient --debug --libssh-debug doesn't yield any more info. > > [2023/04/10 12:02:04.013887, 1] ssh_config_parse_line: Unsupported option: > PreferredAuthentications, line: 60 > [2023/04/10 12:02:04.013984, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 64 > [2023/04/10 12:02:04.014018, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 67 > [2023/04/10 12:02:04.014049, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 71 > [2023/04/10 12:02:04.014088, 1] ssh_config_parse_line: Unsupported option: > TCPKeepAlive, line: 77 > [2023/04/10 12:02:04.025702, 1] socket_callback_connected: Socket connection > callback: 1 (0) > [2023/04/10 12:02:04.588049, 1] ssh_key_cmp: key types don't match! > [2023/04/10 12:02:04.588326, 1] ssh_key_cmp: key types don't match! > [2023/04/10 12:02:04.588388, 1] ssh_key_cmp: key types don't match! > [2023/04/10 12:02:04.694913, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 4 > [2023/04/10 12:02:04.695018, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 7 > [2023/04/10 12:02:04.695062, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 14 > [2023/04/10 12:02:04.695093, 1] ssh_config_parse_line: Unsupported option: > HostKeyAlias, line: 19 > [2023/04/10 12:02:04.716659, 1] ssh_config_parse_line: Unsupported option: > PreferredAuthentications, line: 60 > [2023/04/10 12:02:04.716761, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 64 > [2023/04/10 12:02:04.716811, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 67 > [2023/04/10 12:02:04.716862, 1] ssh_config_parse_line: Unsupported option: > ForwardAgent, line: 71 > [2023/04/10 12:02:04.716904, 1] ssh_config_parse_line: Unsupported option: > TCPKeepAlive, line: 77 > [2023/04/10 12:02:08.024493, 1] ssh_channel_accept: No channel request of > this type from server > [2023/04/10 12:02:08.027575, 1] ssh_channel_accept: No channel request of > this type from server > [2023/04/10 12:02:08.029534, 1] ssh_channel_accept: No channel request of > this type from server > [2023/04/10 12:02:08.030156, 1] ssh_channel_accept: No channel request of > this type from server > [2023/04/10 12:02:08.030814, 1] ssh_channel_accept: No channel request of > this type from server > [2023/04/10 12:02:08.031476, 1] ssh_channel_accept: No channel request of > this type from server > .... Seems like this issue may have been around nearly forever, but I guess something changed at some point in the x2go or libssh logging setup that allowed the ssh errors to get printed. Basically, x2goclient loops forever doing (among other things): addReverseTunnelConnections(); checkReverseTunnelConnections(); checkReverseTunnelConnections() calls ssh_channel_accept_forward() which sets an error if no channel request exists. Now normally this doesn't get logged because x2goclient sets the libssh log level to LOG_SSH_NOLOG (quite likely for this very reason). However, I'm setting: LogLevel ERROR in my ~/.ssh/config file - which has the effect of setting the libssh log level to 1 and so the errors are printed. Now, it does seem incredibly inefficient for x2goclient to repeatedly call ssh_channel_accept_forward() if there are no forwarded connections to accept. Is there any other way to do what is needed here? -- Orion Poplawski IT Systems Manager 720-772-5637 NWRA, Boulder/CoRA Office FAX: 303-415-9702 3380 Mitchell Lane orion@nwra.com Boulder, CO 80301 https://www.nwra.com/