Version-Release number of selected component:
vdsm-4.10.3-10.fc18

Additional info:
cmdline:        python /usr/share/vdsm/nwfilter.pyc
executable:     /usr/share/vdsm/nwfilter.pyc
kernel:         3.8.8-203.fc18.i686.PAE
uid:            0
ureports_counter: 1

Truncated backtrace:
libvirt.py:102:openAuth:libvirtError: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory

Traceback (most recent call last):
  File "/usr/share/vdsm/nwfilter.py", line 85, in <module>
    main()
  File "/usr/share/vdsm/nwfilter.py", line 33, in main
    conn = libvirtconnection.get()
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 148, in get
    conn = utils.retry(libvirtOpenAuth, timeout=10, sleep=0.2)
  File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 934, in retry
    return func()
  File "/usr/lib/python2.7/site-packages/libvirt.py", line 102, in openAuth
    if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory

Local variables in innermost frame:
flags: 0
auth: [[2, 5], <function req at 0xb6e7cf44>, None]
ret: None
uri: 'qemu:///system'