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Questions tagged [vnc]

In computing, Virtual Network Computing (VNC) is a graphical desktop sharing system that uses the RFB protocol to remotely control another computer. It transmits the keyboard and mouse events from one computer to another, relaying the graphical screen updates back in the other direction, over a network.

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TigerVNC: Keyboard shortcut to lose focus in full-screen mode

Is there a keyboard shortcut to lose focus of a TigerVNC viewer window in full-screen mode so that Alt+Tab can be used to switch windows of the host system? I'm looking for something like Ctrl+Alt+← ...
czerny's user avatar
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27 views

How to make Ubuntu VM available to multiple users in the cloud?

I have a design technical question. Let me describe the use case first: I have 20 students. My idea is that they all can run a full Ubuntu Desktop from within their web browser. Everyone should have ...
befaro's user avatar
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0 answers
188 views

Ubuntu VNC with XDMCP Black Screen

I have a ubuntu 22.04 LTS system with the following setup: I have a Systemd unit with Socket Activation, basically the following: [Service] ExecStart=-/usr/bin/Xvnc -inetd -query localhost -geometry ...
juwi's user avatar
  • 573
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0 answers
60 views

VNC connection via SSH for remote access

I want to connect to my remote server via VNC using ssh, the problem is I don't understand how should I do it. I am able to connect to my server through terminal with a ssh config file, and all I have ...
alienobserver's user avatar
0 votes
1 answer
64 views

VNC connection through SSH

I have a problem, I need to establish a VNC connection with ssh, so I can have remote desktop (graphical) access to my server. I tried doing it with Remmina and it was asking me for some ssh key, but ...
alienobserver's user avatar
1 vote
1 answer
1k views

On Debian 11, how to change from xfce4 to GNOME desktop

I installed xfce4 with lightdm on my Debian server (EC2) for users to connect over vnc, so I could run Proton and Windows games. I've since discovered that Flatpak, AppImage, Lutris and Proton greatly ...
gwhiz's user avatar
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1 answer
96 views

Watermark for VNC displays

Are there any feasible options for adding a watermark (i.e. diagonal transparent text) to VNC sessions? I did not find such features provided out of the box for the existing open-source VNC servers. ...
Michael's user avatar
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0 answers
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VNC server on Ubuntu 22.04 only show blank screen

On Ubuntu one can enable a VNC server via Settings > Sharing > screen-sharing > VNC (my Desktop is german, I just guessed). Another way is to start a vnc-server via shell, i.e.: ...
user981366's user avatar
0 votes
1 answer
2k views

Set up TigerVNC on Ubuntu 20.02 with systemd

I am trying to setup TigerVNC - or indeed any VNC server - on Ubuntu 20.04, and I am beginning to get frustrated, because none of the instructions I can find actually work, although I have got it to ...
j4nd3r53n's user avatar
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2 votes
0 answers
334 views

x11vnc -reflect listen crashes when the source VNC server connects to it

I want to run x11vnc in reflect mode and reverse/listenning connection mode. So, x11vnc it's going to act as a repeater for another vnc server and it's going to wait for this second vnc server to ...
Héctor's user avatar
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Simulating classroom with VNC Server

Im tying to simulate classroom with VNC Server. for example , Teacher starts the session on server as operator and students connect to vnc server as a viewer. now is it possible to extend this for ...
Ahad Porkar's user avatar
1 vote
1 answer
976 views

Copy and paste from a QEMU VM with VNC graphics?

I run a headless server that uses qemu + kvm to run a few VMs, and I manage them with virsh + xml file definitions. Because this a remote / headless system, I set the graphics as VNC, and then with ...
Jason's user avatar
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0 votes
1 answer
48 views

How to block rdp passwords brute-forcing? [closed]

I've noticed there are significant spikes in cpu consumption on my servers due to bots trying to brute force my rdp password. I tried to change an rdp port, it helps for a while but then it resumes. ...
SiberianGuy's user avatar
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1k views

Does Apache Guacamole support VNC Connection with GNUTLS?

Currently I've working on my custom Remote Desktop Service which is strongly based on Apache Guacamole. I want my whole session encrypted with TLS when I enter Guacamole and connect to my PC with a ...
redjen's user avatar
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1 answer
389 views

VNC server won't start on AlmaLinux/CentOS 8

I could not get tigervnc to start on my AlmaLinux 8 machine. We have SELinux enabled and our home directories are automounted NFS shares (configured by IPA). I see errors in my /var/log/audit/audit....
rocky's user avatar
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5 votes
2 answers
520 views

CentOS: Admin user on xrdp session can't do admin

I'm running a Rocky Linux 8.4 workstation with GNOME and MATE desktops, but I've seen the same problem on CentOS 7.9... When I log into the machine on the local display, I can do things like ...
kbro's user avatar
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0 answers
181 views

How to start a VNC viewer to display all previously saved VNC viewer desktops (that are now destroyed)?

Problem: My current VNC viewer (let say VNC viewer 'A') resides on a machine (let say machine 'A') that need to be killed because our IT department need to rebuild the machine 'A'. I have a lot of ...
Min's user avatar
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0 votes
1 answer
1k views

guacamole users with admin perms

I installed guacamole from source after a few hours of toil and trying out serveral outdated guides. But at this point I can go to the site and log into the guac web interface and connect to the guacd ...
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0 answers
51 views

VNC Access on Centos 8

I tried to create a vnc session on centos 8 but it showed the below message. Please read /usr/share/doc/tigervnc/HOWTO.md for more information. I followed below instructions, Assigned the port to ...
Minhaj Ahmed's user avatar
1 vote
1 answer
4k views

Trying a VNC for the first time

I've never used a VNC or any remote login programme before So I'm trying to use TigerVNC. However, I'm open to suggestions, I'm happy to try any VNC programme, I just want to get something working. I'...
1toneboy's user avatar
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0 answers
1k views

Vnc connection through nginx reverse proxy

novnc connection through nginx reverse proxy is not working propraly i m using nginx version 1.14.1 events {} http { server { listen 80; location / { proxy_set_header ...
ahmed_chafie's user avatar
0 votes
1 answer
2k views

x11vnc can not connect to X server of gdm greeter

OS: CentOS 8.3 GDM creates a X server for the greeter, and a different one each user that logs in. I am trying to run x11vnc to enable remote access to the machine, but x11vnc is rejected by the X ...
Nadav Aharoni's user avatar
0 votes
1 answer
293 views

How to bind a VNC port with a KVM?

How can I bind a VNC port with a specific virtual machine (KVM) so after a reboot of the host server all ports would remain the same? Right now the numeration of ports is based on the order of ...
Vitaly Sokolov's user avatar
0 votes
2 answers
2k views

Can't access VNC port from local network

I've installed VNC on CentOS and enabled it on port 5901. I made sure that selinux, firewalld and iptables were disabled/stopped on the system for troubleshooting purposes. Now I can successfully ...
L.Ray's user avatar
  • 113
1 vote
1 answer
414 views

Creating VNC session on specific port fails even though the port is clear

Sorry in advance for the huge amount of command output text, I thought it would be more clear than paraphrasing myself. I am using CentOS 7 and tigervnc: (base) [carlos@pulsar .vnc]$ cat /etc/centos-...
slowfingers's user avatar
6 votes
5 answers
4k views

Reducing Latency Between US and India/South Asia or Desktop Access on CentOS 7+ GNOME

We have a server in US DC that is getting accessed from US and India, S Asia and SE Asia. With 128GB RAM, CPU and Cent OS 7 + GNOME desktop and it runs VNC server - the server gets access through VNC ...
SS891's user avatar
  • 71
1 vote
0 answers
70 views

Blocking right-click/keyboard on a VNC server

I'm planning to host an application I don't have the source for via VNC in a kiosk mode kind of manner. A flash game running server-side, to simplify matters. First, only part of the window should be ...
Dawid Blinkov's user avatar
1 vote
1 answer
469 views

Most secure way to connect from Windows 10 to a CentOS8 Shared Desktop

i tried to connect to a CentOS8 desktop from a Windows 10. In CentOS8 I have enabled the Sreen Sharing feature. Then i have tried to connect to the ip address of my CentOS8 from a Windows 10 with ...
Snooops's user avatar
  • 78
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0 answers
2k views

xrdp not connecting on centos 8, how to fix that?

I have used below steps on my cloud machine. Allowed all ports on azure machine(No security for testing). Installed GUI. sudo dnf groupinstall "Server with GUI" installed xrdp and vnc. ...
uday kiran's user avatar
1 vote
0 answers
48 views

Having a Secure / Copy Protected DESKTOP Environment in Cent OS Linux

We have a VPS / Bare-metal server rented on a data-center and we access them over internet through user ID and password. It is running CentOS 7. That is direct access and there's no VPN in between. We ...
SS891's user avatar
  • 71
0 votes
0 answers
1k views

Ubuntu 20.04 LTS Server - KVM with Spice or VNC

I am wondering if anyone has gotten Spice Server or VNC Server to work remotely on ubuntu 20.04? I would be glad to make a video tutorial once I have it working correctly because I can barely find ...
Willie Doc Wright's user avatar
0 votes
1 answer
238 views

Is it possible to control the system only from remote connection using VNC Server?

I have a Linux computer with VNC server running in it. When I connect to that computer remotely from another computer using a Remote Desktop Viewing application, the main computer display is still ...
Pramod's user avatar
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1 vote
0 answers
280 views

Can't select install options when running Debian in headless QEMU/KVM

I am trying to get a Debian VM running on my Arch Linux machine using headless QEMU/KVM. To begin, I boot the virtual system with the following command: qemu-system-x86_64 \ -cdrom ../iso/debian-...
peachykeen's user avatar
0 votes
1 answer
140 views

Tightvnc Server using only 1 core?

I have a server setup with 8 cores and 32gb of RAM. I am using it to launch as many java applications as I can and hope to make the most efficient use of my resources. Upon launching I notice the ...
Plee's user avatar
  • 131
1 vote
1 answer
1k views

Unable to connect to CentOS 7/8 Screen Sharing (VNC) over work VPN

As with most people, we're WFH. It's getting difficult to troubleshoot issues via chat/phone, so we'd like to use the CentOS "Screen Sharing" feature, which comes bundled with the OS, to ...
Argyle's user avatar
  • 63
1 vote
0 answers
2k views

VNC server with multiple users

I assigned each user a VNC port, but when start the services I see this errors: root@kensa-dev-server1:~# systemctl start vncserver@2.service Job for vncserver@2.service failed because the control ...
H Aßdøµ's user avatar
2 votes
6 answers
15k views

Accessing Ubuntu 20.04 from Mac OS Catalina: which client to use?

I have a clean install of Ubuntu 20.04 and have setup screen sharing. It gives me an URL to use to access the desktop, something like vnc://my-computer.local When I type this in a web browser on the ...
DatsunBing's user avatar
1 vote
0 answers
330 views

No packages in any requested group available to install or update on Centos 7 when installing XFCE

I have a GCP instance running Centos 7 and am trying to follow the instructions here to get vncserver running but I keep getting: Maybe run: yum groups mark install (see man yum) No packages in any ...
TroyB's user avatar
  • 31
1 vote
0 answers
188 views

Differences of Docker vs. Docker-Compose attaching to user-defined bridged network

Environment I'm trying to setup User-Machine: dockerized VNC-connected containers (in Docker network vm_network) for different purposes These should be connected by the user using Guac: Apache ...
David Lassig's user avatar
0 votes
1 answer
620 views

VNC client only sees a terminal

I have tightvnc server running on my Xubuntu 16.04. I can then run this command : xvnc4viewer 192.168.1.2:5901 I can connect successfully to my machine but the only thing I see is this : I guess ...
Matias Barrios's user avatar
1 vote
0 answers
213 views

VNC error during live migration of KVM vm

If I live migrate a KVM vm from host 1 to host2 then I get error for vnc. Is there any way to change the vnc dynamically before the migration starts. I donot want to stop and start my vm before or ...
Ash's user avatar
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0 votes
0 answers
19 views

putty disconects after a cople of minutes when using it to make a X tunnel for kvm VNC console

I am using putty from a windows desktop to make an X tunnel so I can access my KVM VMs VNC console (I am using TightVNC) but the putty connection dies after a few minutes. I have other ssh ...
Ben Edwards's user avatar
0 votes
2 answers
1k views

How can I setup a dual SSH tunnel so that two machines A and B behind firewalls ssh into a central sever such that A can VNC into B?

I need to connect via VNC from my machine A to another machine belonging to my friend B. Both of us have no way to open incoming ports - ISPs do not allow tunneling unless you buy a static IP based ...
rep_movsd's user avatar
  • 103
1 vote
2 answers
3k views

Open Source Remote Access using VNC and Reverse SSH

I am trying to get a remote access approach (open source) working involving openssh and tightvnc that deals with NAT, that allows someone to remote to my server and then allows me to vnc back to their ...
Senrabdet's user avatar
  • 101
0 votes
2 answers
1k views

How to install x11vnc in offline mode?

I am trying to install x11vnc on linux machine which doesn't have internet on it.So i won't able to install using sudo apt-get install x11vnc command. Can someone please help me install x11vnc with ...
Yosuva Arulanthu's user avatar
0 votes
1 answer
848 views

Bind VNC over SSH jump host tunnel to something other than localhost port

I know how to use a jumphost to create an VNC SSH tunnel ssh -A -N -L 5901:targethost:5901 jumphost however, that binds to the localhost of the initiating machine. So if I want to bind to many hosts ...
ArloVande's user avatar
0 votes
1 answer
399 views

which means double 2 points 192.168.1.2::3 in a vnc connection

install real vnc to make connections to a windows server but at the time of accessing me it appears that to access I must approach it with the route 192.168.1.2::3 I understand that : after the IP ...
Bryro's user avatar
  • 101
0 votes
0 answers
45 views

Giving VNC access to screen shared via Xvnc

Let's say I want to share a screen with someone. I want this person to be able to control one application in this screen (the application is started with my user). To do that I am doing the ...
klaus's user avatar
  • 101
0 votes
1 answer
2k views

SSH Port Forwarding not working

I have two CentOS 7 servers (Hypervisor and Relay for this scenario) . I wish to connect to a VNC port on Hypervisor which is behind a firewall by using Relay with is a server with SSH open to ...
user1955162's user avatar
0 votes
1 answer
120 views

VNC ISPSystem glitches on high resolution

I am trying to perform an installation of Android x86 8.1 RC2 on VPS through the means of ISP panel, via VNC. Here is what I see in any VNC client (noVNC, VNC Viewer): Such a bug only appears after ...
reardenlife's user avatar

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