Bug 1014422 - qemu doesn't listen on IPv6 socket for localhost VNC
qemu doesn't listen on IPv6 socket for localhost VNC
Product: Fedora
Classification: Fedora
Component: libvirt (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Libvirt Maintainers
Fedora Extras Quality Assurance
Depends On:
Blocks: IPv6Blocker
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Reported: 2013-10-01 20:37 EDT by Charles R. Anderson
Modified: 2016-04-26 10:12 EDT (History)
16 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1038963 (view as bug list)
Last Closed: 2015-02-17 12:27:13 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Charles R. Anderson 2013-10-01 20:37:03 EDT
Description of problem:

qemu doesn't listen on IPv6 socket for IPv4 and IPv6 VNC connections.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Use virt-manager to create and start a guest with VNC display
2. Check the listening VNC socket: sudo netstat -nlp | grep :59

Actual results:

>sudo netstat -nlp | grep :59
tcp        0      0*               LISTEN      3233/qemu-system-x8 

Expected results:

qemu should listen on an IPv6 socket configured to accept both IPv4 and IPv6 connections.

>sudo netstat -nlp | grep :59
tcp6        0      0 ::1:5900          :::*               LISTEN      3233/qemu-system-x8 

Additional info:
Comment 1 Cole Robinson 2013-10-31 17:06:30 EDT
Dan, thoughts on if this is intentional or a defect, and if so is it qemu or libvirt?
Comment 2 Daniel Berrange 2013-11-01 04:56:23 EDT
It is a bug - we should listen on ::1 by default, with v6-only=0 so that it also covers At minimum it is a libvirt bug.
Comment 3 Ján Tomko 2013-11-01 12:21:42 EDT
::1 with IPV6_V6ONLY=0 does not cover, that only works for ::

Since QEMU only supports one listen address, we can't tell it to listen on both.

Even if we specify a hostname ('localhost') QEMU will only listen on the first address that works (usually ::1 on dual-stack systems) instead of listening on all of them.
Comment 4 Fedora End Of Life 2015-01-09 15:04:17 EST
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Comment 5 Fedora End Of Life 2015-02-17 12:27:13 EST
Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is
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