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Re: [Qemu-devel] resetting a stale VNC connection

From: Anthony Liguori
Subject: Re: [Qemu-devel] resetting a stale VNC connection
Date: Tue, 21 Apr 2009 11:49:11 -0500
User-agent: Thunderbird (X11/20090320)

Daniel P. Berrange wrote:
On Tue, Apr 21, 2009 at 04:38:55PM +0300, Avi Kivity wrote:
David S. Ahern wrote:
Is there a monitor command (or other method) to force a VNC client
connection to close?

It looks like the vnc code does not use keepalive probes. If the
connection is left hanging the VNC server will never drop it. I have hit
this condition a couple of times when a VPN connection drops while the
vncviewer is connected to a VM.

Specific software version at the moment is kvm-81.
Why not just enable tcp keepalives?

Independant of killing off stale VNC clients, it could be desirable to
have a monitor command to kill a client, to allow revoking of end user
access to VNC.

I'm surprised change vnc none doesn't kill off all VNC connections.

I don't see a compelling use case to boot off individual clients other than we can. Is there something specific you were thinking someone would want to do?


Anthony Liguori


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