Veyon itself does not have a built-in feature to block specific websites, but you can achieve this through other methods. One option is to configure your network’s firewall or router settings to block specific URLs while keeping general internet access available. Another approach is to use web filtering software like OpenDNS, K9 Web Protection, or your school's content filtering system to restrict access to certain sites. Additionally, you can set up browser extensions or parental controls to limit website access on student machines. While Veyon allows you to monitor and control student activity, you can also use its screen-locking or application-control features to minimize distractions during lessons. Hope this helps!

Hello,
(I'm just a user like you.)

To do that with Veyon, you have to purchase the Internet Access Control plugin.

I have the same issue but my PCs have the latest veyon, 4.9.3, win 10 and file key authentification. Some PC have a duplicant screen from a working machine, some only gray all time. I tried clean reinstall windows, doest help, all settings same. Host names are unique and the veyon ports are open.

Hi Perge

What way did you perform the update on all computers. I'm in a similar situation and always manually logged on at every machine to do the update.

Any assistance would be greatly appreciated.

Declan

peki ekran paylaşımı yapabiliyor musunuz karşınızda bulunanlara bende güncelleme sonrası öğretmen bilgisayarımı öğrencilere yansıtamıyorum

Today I tried to run (as root):

veyon-server start

The error message looks like this:

veyon-server start QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root' 22/01/2025 12:12:34 passing arg to libvncserver: -rfbport 22/01/2025 12:12:34 passing arg to libvncserver: 11200 22/01/2025 12:12:34 passing arg to libvncserver: -rfbportv6 22/01/2025 12:12:34 passing arg to libvncserver: 11200 22/01/2025 12:12:34 passing arg to libvncserver: -passwd 22/01/2025 12:12:34 x11vnc version: 4.9.0 lastmod: 2019-01-05 pid: 10067 22/01/2025 12:12:34 Using X display :0 22/01/2025 12:12:34 rootwin: 0x496 reswin: 0xe00001 dpy: 0x8c0089b0 22/01/2025 12:12:34 22/01/2025 12:12:34 ------------------ USEFUL INFORMATION ------------------ 22/01/2025 12:12:34 X DAMAGE available on display, using it for polling hints. 22/01/2025 12:12:34 To disable this behavior use: '-noxdamage' 22/01/2025 12:12:34 22/01/2025 12:12:34 Most compositing window managers like 'compiz' or 'beryl' 22/01/2025 12:12:34 cause X DAMAGE to fail, and so you may not see any screen 22/01/2025 12:12:34 updates via VNC. Either disable 'compiz' (recommended) or 22/01/2025 12:12:34 supply the x11vnc '-noxdamage' command line option. 22/01/2025 12:12:34 X COMPOSITE available on display, using it for window polling. 22/01/2025 12:12:34 To disable this behavior use: '-noxcomposite' 22/01/2025 12:12:34 22/01/2025 12:12:34 Wireframing: -wireframe mode is in effect for window moves. 22/01/2025 12:12:34 If this yields undesired behavior (poor response, painting 22/01/2025 12:12:34 errors, etc) it may be disabled: 22/01/2025 12:12:34 - use '-nowf' to disable wireframing completely. 22/01/2025 12:12:34 - use '-nowcr' to disable the Copy Rectangle after the 22/01/2025 12:12:34 moved window is released in the new position. 22/01/2025 12:12:34 Also see the -help entry for tuning parameters. 22/01/2025 12:12:34 You can press 3 Alt_L's (Left "Alt" key) in a row to 22/01/2025 12:12:34 repaint the screen, also see the -fixscreen option for 22/01/2025 12:12:34 periodic repaints. 22/01/2025 12:12:34 22/01/2025 12:12:34 XFIXES available on display, resetting cursor mode 22/01/2025 12:12:34 to: '-cursor most'. 22/01/2025 12:12:34 to disable this behavior use: '-cursor arrow' 22/01/2025 12:12:34 or '-noxfixes'. 22/01/2025 12:12:34 using XFIXES for cursor drawing. 22/01/2025 12:12:34 GrabServer control via XTEST. 22/01/2025 12:12:34 22/01/2025 12:12:34 Scroll Detection: -scrollcopyrect mode is in effect to 22/01/2025 12:12:34 use RECORD extension to try to detect scrolling windows 22/01/2025 12:12:34 (induced by either user keystroke or mouse input). 22/01/2025 12:12:34 If this yields undesired behavior (poor response, painting 22/01/2025 12:12:34 errors, etc) it may be disabled via: '-noscr' 22/01/2025 12:12:34 Also see the -help entry for tuning parameters. 22/01/2025 12:12:34 You can press 3 Alt_L's (Left "Alt" key) in a row to 22/01/2025 12:12:34 repaint the screen, also see the -fixscreen option for 22/01/2025 12:12:34 periodic repaints. 22/01/2025 12:12:34 22/01/2025 12:12:34 XKEYBOARD: 22/01/2025 12:12:34 Switching to -xkb mode to recover these keysyms: 22/01/2025 12:12:34 xkb noxkb Keysym ("X" means present) 22/01/2025 12:12:34 --- ----- ----------------------------- 22/01/2025 12:12:34 X 0x40 at 22/01/2025 12:12:34 X 0x5b bracketleft 22/01/2025 12:12:34 X 0x5d bracketright 22/01/2025 12:12:34 X 0x7b braceleft 22/01/2025 12:12:34 X 0x7d braceright 22/01/2025 12:12:34 X 0x7c bar 22/01/2025 12:12:34 X 0x5c backslash 22/01/2025 12:12:34 22/01/2025 12:12:34 If this makes the key mapping worse you can 22/01/2025 12:12:34 disable it with the "-noxkb" option. 22/01/2025 12:12:34 22/01/2025 12:12:34 22/01/2025 12:12:34 X FBPM extension not supported. Xlib: extension "DPMS" missing on display ":0". 22/01/2025 12:12:34 X display is not capable of DPMS. 22/01/2025 12:12:34 -------------------------------------------------------- 22/01/2025 12:12:34 22/01/2025 12:12:34 Default visual ID: 0x3b 22/01/2025 12:12:34 Read initial data from X display into framebuffer. 22/01/2025 12:12:34 initialize_xdisplay_fb: \*\*\* fb creation failed: 0x0 try: 1 22/01/2025 12:12:35 Default visual ID: 0x3b 22/01/2025 12:12:35 Read initial data from X display into framebuffer. 22/01/2025 12:12:35 initialize_xdisplay_fb: \*\*\* fb creation failed: 0x0 try: 2 22/01/2025 12:12:35 Default visual ID: 0x3b 22/01/2025 12:12:35 Read initial data from X display into framebuffer. 22/01/2025 12:12:35 initialize_xdisplay_fb: \*\*\* fb creation failed: 0x0 try: 3 22/01/2025 12:12:35 Default visual ID: 0x3b 22/01/2025 12:12:35 Read initial data from X display into framebuffer. 22/01/2025 12:12:35 initialize_xdisplay_fb: \*\*\* fb creation failed: 0x0 try: 4 22/01/2025 12:12:35 Default visual ID: 0x3b 22/01/2025 12:12:35 Read initial data from X display into framebuffer. 22/01/2025 12:12:35 initialize_xdisplay_fb: \*\*\* fb creation failed: 0x0 try: 5 2025-01-22T12:12:35.793: \[ERR\] LinuxPlatformPlugin: Received signal 11 2025-01-22T12:12:35.795: \[ERR\] BACKTRACE: /lib/x86_64-linux-gnu/libc.so.6(+0x42520) \[0x7a7df4442520\] /usr/lib/x86_64-linux-gnu/veyon/builtin-x11vnc-server.so(+0x7fc00) \[0x7a7ddc67fc00\] /usr/lib/x86_64-linux-gnu/veyon/builtin-x11vnc-server.so(+0x40450) \[0x7a7ddc640450\] /usr/lib/x86_64-linux-gnu/veyon/builtin-x11vnc-server.so(+0x145e5) \[0x7a7ddc6145e5\] veyon-server(+0xa8f1) \[0x5802944ff8f1\] /lib/x86_64-linux-gnu/libQt5Core.so.5(+0xccca1) \[0x7a7df4cccca1\] /lib/x86_64-linux-gnu/libc.so.6(+0x94ac3) \[0x7a7df4494ac3\] /lib/x86_64-linux-gnu/libc.so.6(+0x126850) \[0x7a7df4526850\] 2025-01-22T12:12:35.795: \[CRIT\] Aborting due to severe error Abgebrochen

Hello,

on Linux the Screen Recorder add-on is provided in separate packages to avoid unneccessary FFMPEG dependencies when using one of the other add-ons only. You therefore need to install the appropriate package from https://github.com/veyon/addons/releases (Click on "Show all 26 assets" to see all files).

Best regards
Tobias