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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8 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 ...
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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 ...
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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 ...
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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-...
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“VNC password failed, VNC error” (w/ AD linked user on SSSD-enabled linux server)?

I have someone trying to connect to a CenOS 7 server via Windows Remote Desktop (based on the instructions here: https://www.itzgeek.com/how-tos/linux/centos-how-tos/install-xrdp-remote-desktop-to-...
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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 ...
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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 ...
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How to properly start dbus with vnc

I'm running a Fedora VPS which I want to set up a VNC server with KDE. It seems to works fine. But when I ran some programs, I got error that dconf would't work because dbus user address wasn't set ...
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1answer
102 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 ...
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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. ...
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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 ...
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379 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 ...
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1answer
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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 ...
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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-...
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tigervnc shell not opening in $HOME

I have set up tigervnc a few times now, including on Fedora 32 and Fedora 28 (and others). I am able to connect, and everything looks okay, except when I start a new terminal. When I start the new ...
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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 ...
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191 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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1answer
53 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 ...
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95 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 ...
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312 views

How to install tigervnc client in WSL?

I'm trying to install tigervnc client in Windows subsystem for linux. sudo apt install tigervnc-viewer I get, Reading package lists... Done Building dependency tree Reading state information... ...
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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 ...
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26 views

How do you start tightvncserver with a password file already defined?

This is in Ubuntu 16. I am trying to configure tightvncserver to run without prompting the user to enter a password on its first run after the Vagrant box it resides within gets re-upped from new. I ...
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2answers
105 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 ...
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1k 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 ...
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2answers
284 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 ...
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422 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 ...
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149 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 ...
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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 ...
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1answer
651 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 ...
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1answer
108 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 ...
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1answer
343 views

tigerVNC and XRDP are causing android studio GUI windows to be whited out

So, I recently deployed an Appium server on a physical dl320 so we can automate our mobile app development. I am using an older version of KVM that only allows one console connection at a time. This ...
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1answer
3k views

How to set keyboard layout with a VNC client to KVM (libvirt)

I have both kvm guests and hosts installed on a Debian 9.9 with kde on an AMD Machine qemu-kvm 1:2.8+dfsg-6+deb9u7 amd64 When connecting with a virt-viewer, my keyboard ...
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1answer
514 views

Screen sharing with x11vnc + noVNC

Context & Goal I have a small embedded device running Linux armv71. My goal is to remotely access the screen through a web browser with a mobile device. I have x11vnc running which I thought ...
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1answer
892 views

x11vnc Web Browser Access

The Problem I have a Linux embedded device and I'm trying to share the screen to access it remotely through a web browser using x11vnc. I've searched through multiple posts that explain how to do this ...
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692 views

Unable to use VNC when connected to OpenVPN

When I try to VNC to a particular machine #1 (192.168.1.221) from within the network I am able to connect to it without issue. When I try to connect from outside the network from my OpenVPN VPN I am ...
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1answer
750 views

SSH connection using proxy instead of port forwarding

I have a linux system behind a network where I cannot do port forwarding Is it possible to configure my SSH and VNCserver on the machine to use a proxy server from which i can make vnc and ssh ...
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1answer
687 views

What security weekness(es) does my vino VNC server have? [closed]

I installed vino VNC server on Lubuntu 18.04, and configured and started my vino server according to https://askubuntu.com/a/530196/1471: $ export DISPLAY=:0 $ gsettings set org.gnome.Vino enabled ...
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185 views

Shift+Insert key inserts 0 instead doing paste in VNC server

While working with linux machines/terminal, I always use shift+Insert to paste the clip board content. I am using vnc viewer app to login to my VNC server but shift+Insert isn't working in the Linux ...
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1answer
80 views

How do I secure my VNC for access via iOS?

I am running Ubuntu 18.04 on Google Compute Engine, the instance is running VNC which it is up and running using : vncserver -SecurityTypes=VeNCrypt,TLSVnc But when I try to use VNC Viewer on iOS, ...
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4k views

Why does VirtualGL raise a *Could not open display :0* error after host reboot

I am using vncserver to connect to a CentOS7 machine in the network. In order to make use of 3D graphics accelerations I am using VirtualGL. So any OpenGL program needs to be launched with vglrun to ...
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220 views

TightVNC Server sometimes fail to start on RHEL7.4

I've a RHEL 7.4 box with TightVNC service enabled on boot and sometimes the service fails to start with a PAM permission denied error: systemd[2027]: pam_nologin(login:account): conversation failed ...
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290 views

Tight VNC on Windows Server16

I am no means Windows fella, but due to circumstances have to configure sikuli test suite on Windows Server 2016. The problem I have is that i have installed Tight VNC on it, and when connect to the ...
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2answers
252 views

How can I install VNC Server on Red Hat 7.2 that is not connected to the internet?

I have a 64-bit Red Hat 7.2 server that is isolated from the Internet. I am able to SSH to it easily, as well as transfer files using USB. I downloaded VNC-Server-5.0.5-Linux-x64.rpm and tried to ...
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1answer
279 views

Unable to login to Suse 12 SP1 vnc server as root, works as normal user

I have a Suse 12 SP1 server. I'm not able to login to the vnc service as root, however it works as a normal user. Log entries below are from root attempt. Timestamp and server name removed for brevity....
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2answers
614 views

Lightweight way to graphically connect to guest VMs on “headless” hypervisor

Running a Fedora Server 28 hypervisor (QEMU/KVM with libvirt tools) with Windows- and Fedora-based guest VMs. Normally, the hypervisor runs headless with minimal packages installed, and guest VMs are ...
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1answer
212 views

Wrong keymap in KVM guest

I connect to a KVM host (CentOS 7) by VNC. The keymap on the host is de-ch. While connected to the host i open a guest server (any OS) by the virt-manager and try to login to the guest, but the keymap ...

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