[GH-ISSUE #570] VNC Authentication failure #430

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opened 2026-02-27 16:39:16 +03:00 by kerem · 0 comments

kerem commented

2026-02-27 16:39:16 +03:00

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Originally created by @stex79 on GitHub (Jul 20, 2015).
Original GitHub issue: https://github.com/retspen/webvirtmgr/issues/570

Hi,
I cannot connect to to Instance console getting always the "Authentication failed" message as you can see below.
screen shot 2015-07-20 at 15 05 18

I don't have configured vnc password for each instance, but I'm using a general password setting up vnc_password parameter in /etc/libvirt/qemu.conf.
I can confirm that using an external VNC client I can connect to instances console.
And using tcpdump I see the attempt to connect to the console that ends with the VNC response of authentication failure.

If I try to set a password for the instance to authenticate with in the instance details, but I cannot do it.
I think that the only problem is to tell the webvirtmgr console to use the password, but where must be configured?

Any advise on this?

Both hypervisors and webvirtmgr runs on CentOS 7
webvirtmgr retrieved from git
KVM version:
Compiled against library: libvirt 1.2.8
Using library: libvirt 1.2.8
Using API: QEMU 1.2.8
Running hypervisor: QEMU 1.5.3

Originally created by @stex79 on GitHub (Jul 20, 2015). Original GitHub issue: https://github.com/retspen/webvirtmgr/issues/570 Hi, I cannot connect to to Instance console getting always the "Authentication failed" message as you can see below. <img width="1276" alt="screen shot 2015-07-20 at 15 05 18" src="https://cloud.githubusercontent.com/assets/12548296/8777618/06cd7d8e-2ef1-11e5-93aa-bb0daf18cddd.png"> I don't have configured vnc password for each instance, but I'm using a general password setting up vnc_password parameter in /etc/libvirt/qemu.conf. I can confirm that using an external VNC client I can connect to instances console. And using tcpdump I see the attempt to connect to the console that ends with the VNC response of authentication failure. If I try to set a password for the instance to authenticate with in the instance details, but I cannot do it. I think that the only problem is to tell the webvirtmgr console to use the password, but where must be configured? Any advise on this? Both hypervisors and webvirtmgr runs on CentOS 7 webvirtmgr retrieved from git KVM version: Compiled against library: libvirt 1.2.8 Using library: libvirt 1.2.8 Using API: QEMU 1.2.8 Running hypervisor: QEMU 1.5.3