cannot connect to Windows Server 2012 R2 (but via MacOSX the server is usable)

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Local System Description

• Client (OS name and version):openSUSE Tumbleweed 20181012
• Remmina version ( remmina --version ): 1.2.31.4
• Installation mean:
  • Distribution package.
  • PPA.
  • Snap.
  • Flatpak.
  • Compiled from sources.
  • Other - detail:
• Desktop environment (GNOME, Unity, KDE, ..): Gnome
• Plugin:
  • RDP - freerdp version ( xfreerdp --version ):
  • VNC
  • SSH
  • SFTP
  • SPICE
  • EXEC
  • Other (Please specify):
• Gtk Backend (Wayland, Xorg, ??): Wayland
• Optional: include the output of the following commands at the end of this text:

  • remmina --full-version StatusNotifier/Appindicator support: not supported by desktop. libappindicator will try to fallback to GtkStatusIcon/xembed Running under Gnome Shell version 3.28.3 Remmina - 1.2.31.4 (git n/a) NAME TYPE DESCRIPTION PLUGIN AND LIBRARY VERSION RDP Protokoll RDP – Remote Desktop Protokoll RDP Plugin: 1.2.31.4 (git n/a), Compiled with FreeRDP lib: 2.0.0-rc3 (n/a), Running with FreeRDP lib: 2.0.0-rc3 (rev n/a), H264: No RDPF Datei RDP – RDP-Import/Export RDP Plugin: 1.2.31.4 (git n/a), Compiled with FreeRDP lib: 2.0.0-rc3 (n/a), Running with FreeRDP lib: 2.0.0-rc3 (rev n/a), H264: No RDPS Einstellung RDP – Einstellungen RDP Plugin: 1.2.31.4 (git n/a), Compiled with FreeRDP lib: 2.0.0-rc3 (n/a), Running with FreeRDP lib: 2.0.0-rc3 (rev n/a), H264: No SFTP Protokoll SFTP - Sichere Dateiübertragung 1.2.31.4
    SSH Protokoll SSH - Secure Shell 1.2.31.4
    VNC Protokoll VNC - VNC viewer 1.2.31.4
    VNCI Protokoll VNCI - VNC viewer listen mode 1.2.31.4
    glibsecret Geheimnis GNOME libsecret 1.2.31.4

  • sudo lshw -C video *-display
    description: VGA compatible controller product: Skylake GT2 [HD Graphics 520] vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 07 width: 64 bits clock: 33MHz capabilities: pciexpress msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:125 memory:d0000000-d0ffffff memory:c0000000-cfffffff ioport:1c00(size=64) memory:c0000-dffff

  • uname -a Linux linux-x8a1 4.18.12-1-default #1 (closed) SMP PREEMPT Thu Oct 4 06:37:48 UTC 2018 (a880bd8) x86_64 x86_64 x86_64 GNU/Linux

Remote System Description

• Server (OS name and version): Windows Server 2012 R2
• Special notes regarding the remote system (i.e. gateways, tunnel, etc): don't know, works with the Microsoft App on Mac OS X

Problem Description

Write here a detailed description of the problem/request.

I cannot connect to the server of my school (which sometimes worked with Remmina and sometimes it didn't). But it ALWAYS works from Mac OS X (with the Microsoft App), so the Server runs normally. Remmina tells me, that it was unable to locate the address of the server "Kann die Adresse des Servers XXXX.YYYYYYYYYY.LAN nicht finden."

Output of the debug window: "Gnome Shell version: 3.28.3 STATS upload: JSON data{"UID":"UBHTCSQJAWZZPT-425b238b8f","REMMINAVERSION":{"version":"1.2.31.4","git_revision":"n/a","snap_build":0,"flatpak_build":0},"SYSTEM":{"kernel_name":"Linux","kernel_release":"4.18.12-1-default","kernel_arch":"x86_64","lsb_distributor":"openSUSE\n","lsb_distro_description":""openSUSE Tumbleweed"\n","lsb_distro_release":"20181012\n","lsb_distro_codename":"n/a\n","etc_release":{"/etc/os-release":"NAME="openSUSE Tumbleweed"\n# VERSION="20181012"\nID="opensuse-tumbleweed"\nID_LIKE="opensuse suse"\nVERSION_ID="20181012"\nPRETTY_NAME="openSUSE Tumbleweed"\nANSI_COLOR="0;32"\nCPE_NAME="cpe:/o:opensuse:tumbleweed:20181012"\nBUG_REPORT_URL="https://bugs.opensuse.org\"\nHOME_URL=\"https://www.opensuse.org/\"\n"}},"GTKVERSION":{"major":3,"minor":22,"micro":30},"GTKBACKEND":"X11","WINDOWMANAGER":{"window_manager":"Gnome Shell","gnome_shell_ver":"3.28.3"},"APPINDICATOR":{"appindicator_supported":0,"icon_is_active":0},"PROFILES":{"profile_count":1,"RDP":1,"DATE_RDP":null}} STATS upload: Starting upload to url https://www.remmina.org/stats/upload_stats.php STATS script response: 201 OK, but rejected because too fresh

STATS http upload error from server side script: 201 OK, but rejected because too fresh"

By the way "TOO FRESH", is kind of amusing, is this really intended?

AND: I am able to ping the server of the school (whithout the remote. in front of .randomdomain.xy)

I hope I provided everything helpful. Please ask for further information if needed.