Comment 2 for bug 1048765

Reviewed: https://review.openstack.org/12727
Committed: http://github.com/openstack/nova/commit/959c93f6d3572a189fc3fe73f1811c12323db857
Submitter: Jenkins
Branch: master

commit 959c93f6d3572a189fc3fe73f1811c12323db857
Author: Vishvananda Ishaya <email address hidden>
Date: Mon Sep 10 11:37:39 2012 -0700

    Fixes snat rules in complex networking configs

    There is currently no way to disable nova's snat rule, which causes
    problems for some network configurations with an external gateway.
    This patch allows the snat to be completely disabled by setting
    a blank value for routing_source_ip.

    This patch also makes the snat rule a little more specific, only
    snatting traffic that is destined for the public interface (or
    the floating interface if it is defined). This allows the snat
    to work without changing routing_source_ip and also ensures that
    an instance assigned multiple ips from different floating pools
    will connect from the appropriate address for each pool

    Fixes bug 1048765

    Change-Id: I18be88a3dbb7a9f4762db7beefc94e07b8310100