Comment 6 for bug 1611991

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Kevin Benton (kevinbenton) wrote : Re: [ovs firewall] Port 23 is open on booted vms with only ping/ssh on 22 allowed.

This was released in Mitaka as an experimental security groups driver. It is not the default and it required a newer OVS version not shipped with many distros. So it was possible to use but I'm not sure how large the user base was for it.