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2015-06-14 21:13:30 -0500 answered a question HypervisorUnavailable: Connection to the hypervisor is broken on host: compute01

This is usually due to libvirtd set to listen to TLS connections.

Edit the following:

/etc/libvirt/libvirtd.conf

Find the following line:

listen_tls = 1

And change it to:

listen_tls = 0

Restart libvirtd and restart nova-compute.

2014-12-25 22:57:51 -0500 answered a question how openstack provides security

I'm not sure what your full question is but I'd look into the OpenStack Security Guide on OpenStack security:

http://docs.openstack.org/sec/

2014-06-25 09:39:53 -0500 commented answer HP Helion OpenStack Community Virtual Install--> Not downloading correct file

To clarify, the download link works but not all of the time. The first download worked fine but subsequent downloads would stop after 1GB. As of this morning the download link appears to be working correctly.

2014-06-23 13:11:37 -0500 answered a question HP Helion OpenStack Community Virtual Install--> Not downloading correct file

The download will take 30-60 minutes to fully download.

2014-05-18 12:21:44 -0500 received badge  Teacher (source)
2014-03-12 13:48:28 -0500 answered a question DDoS protection for OpenStack Clouds

Maybe it's me, but wouldn't you not want your OS to filter those requests? The benefit to what Radware has developed is that it's a small module that punts flows to a central or cluster location for scrubbing. It uses information based on a current baseline of the incoming/outgoing requests at different intervals of the day to determine malicious or anomalous traffic. This eases any additional load that your Openstack environment would have to undertake.

You could filter keystone requests via a firewall but you are still susceptible to resource exhaustion. You're better off having an API gateway that's validating your requests.