Comment 1 for bug 227837

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J. Bruce Fields (bfields-fieldses) wrote : Re: overzealous masquerading affects vm to vm traffic

This is already fixed in upstream (in the manner the reporter suggests); see commit d175caad25a4e80800d5e7e7d8c9d920a88b78e1 from git://git.et.redhat.com/libvirt.git, attached.

I've applied that patch to libvirt0 0.4.0-2ubuntu8. It applies cleanly except for a reject on the changelog, and it does fix the problem.

(I ran across this trying to set up a virtual gfs2 cluster for testing; it failed because cluster nodes rejected traffic that (due to thbe unnecessary masquerading) appeared to come from the host instead of the other (guest) cluster nodes.)