[pve-devel] openflow firewall

Dietmar Maurer dietmar at proxmox.com
Sun Dec 29 14:55:07 CET 2013

> Yes, I see also that. That why I would like to see performance.
> But it seem that only first packet of a flow is going to the controller.
> (But I don't known what is the size of a flow ? how many packets ?)

AFAIK we do not need to use a controller - we just setup flow table statically
using ovs-ofctl.

> >>Some recent OVS addition allows at least to match tcp_flags, but this
> >>is not comparable with real (iptables) connection tracking. I will do
> >>further tests.
> Yes, this is also discussed here :
> https://wiki.openstack.org/wiki/Neutron/blueprint_ovs-firewall-driver
> "My preferred implementation is 'stateless ACLs with tcp_flags=ack' to emulate
> stateful behavior (at least in TCP) because reflexive learning is not as
> performant."

I will try to setup a test script for that.

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