[one-users] blacklist ports with openvswitch

Wed Nov 26 08:12:02 PST 2014

It would be great if we could figure out a way to provide this
functionality for Open vSwitch. It is a top priority in OpenNebula's
roadmap, so any ideas are very welcome!

What do you mean by adapting OpenvSwitch.rb? What changes do you need in
the short-term?

On Wed, Nov 26, 2014 at 4:59 PM, Madko <madko77 at gmail.com> wrote:

> Thanks Jaime for this explaination. Right now openflow is not really a top
> priority for us and OpenNebula 4.12 seems quite interesting. So we could
> wait for this release. We will certainly switch from OpenStack to
> OpenNebula because of all this mess they have done on the network stack
> (ovs => bridge => iptables + network namespace etc). Your "Keep It Simple"
> approach is very reconforting. But we really need openvswitch support, so I
> will try to adapt OpenvSwitch.rb.
>
> 2014-11-26 16:04 GMT+01:00 Jaime Melis <jmelis at opennebula.org>:
>
>> Hi,
>>
>> Unfortunately WHITE_PORTS_* is not supported for the Open vSwitch drivers
>> (see here:
>> http://docs.opennebula.org/4.10/administration/networking/openvswitch.html#network-filtering
>> )
>>
>> We'd like very much to be able to provide this feature, but as far as we
>> know there's no way to do this satisfactorily. There is nothing similar to
>> 'in_port' but that matches the outgoing switch port, i.e. there's no
>> 'out_port'.
>>
>> We are currently re-evaluating this, because in OpenNebula 4.12 we're
>> going to provide a new resource type: Security Groups, and you can define a
>> lot of things: INBOUND, or OUTBOUND, protocol (TCP, UDP, ICMP, IPSEC)
>> ICMP_TYPE, Port ranges,  and best of all, specific networks, so for example
>> you can block out all the traffic to port 22 except if they're on the same
>> network. And we can't do this for Open vSwitch. AFAIK OpenStack does this
>> by sending the traffic to an ad-hoc linux bridge, running iptables rules on
>> it, and sending it back to Open vSwitch. Which is something we would like
>> to avoid at all costs!
>>
>> With regard to your first message, it's very strange, the rules look
>> perfectly fine, not sure why it's not working...
>>
>> On Wed, Nov 26, 2014 at 3:53 PM, Madko <madko77 at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I also have tested WHITE_PORTS_TCP but it seems worse since I don't have
>>> any specific openflow rules:
>>>
>>>  cookie=0x0, duration=819.774s, table=0, n_packets=0, n_bytes=0,
>>> idle_age=819, icmp,dl_vlan=199,dl_dst=02:00:c0:a8:c7:05 actions=drop
>>>  cookie=0x0, duration=819.800s, table=0, n_packets=2, n_bytes=134,
>>> idle_age=798, priority=40000,in_port=3,dl_src=02:00:c0:a8:c7:05
>>> actions=NORMAL
>>>  cookie=0x0, duration=819.825s, table=0, n_packets=4, n_bytes=168,
>>> idle_age=806, priority=45000,arp,in_port=3,dl_src=02:00:c0:a8:c7:05
>>> actions=drop
>>>  cookie=0x0, duration=2952.547s, table=0, n_packets=41, n_bytes=5323,
>>> idle_age=803, priority=0 actions=NORMAL
>>>  cookie=0x0, duration=819.813s, table=0, n_packets=4, n_bytes=168,
>>> idle_age=803,
>>> priority=46000,arp,in_port=3,dl_src=02:00:c0:a8:c7:05,arp_spa=192.168.199.5
>>> actions=NORMAL
>>>  cookie=0x0, duration=819.786s, table=0, n_packets=0, n_bytes=0,
>>> idle_age=819, priority=39000,in_port=3 actions=drop
>>>
>>> Only the icmp drop rule is added. Is it normal?
>>>
>>> Is there anyone here using OpenNebula with OpenVswitch?
>>>
>>> 2014-11-21 9:33 GMT+01:00 Madko <madko77 at gmail.com>:
>>>
>>>> Hi,
>>>>
>>>> I'm using OpenNebula 4.10 on CentOS 7 and I'm trying to use some
>>>> network filtering.
>>>> I'm following the documentation found here:
>>>> http://docs.opennebula.org/4.10/administration/networking/openvswitch.html#openvswitch
>>>>
>>>> Here is my VM network definition:
>>>> NIC=[
>>>>   AR_ID="0",
>>>>   BLACK_PORTS_TCP="80",
>>>>   BRIDGE="br0",
>>>>   ICMP="drop",
>>>>   IP="192.168.2.50",
>>>>   MAC="02:00:c0:a8:02:32",
>>>>   NETWORK="LAN",
>>>>   NETWORK_ID="0",
>>>>   NETWORK_UNAME="oneadmin",
>>>>   NIC_ID="0",
>>>>   VLAN="YES",
>>>>   VLAN_ID="2" ]
>>>>
>>>> But on my hypervisor where this VM is running, here are the openflows
>>>> rules:
>>>> [root at node02 ~]# ovs-ofctl dump-flows br0
>>>> NXST_FLOW reply (xid=0x4):
>>>>  cookie=0x0, duration=1893.122s, table=0, n_packets=0, n_bytes=0,
>>>> idle_age=1893, icmp,dl_vlan=2,dl_dst=02:00:c0:a8:02:32 actions=drop
>>>>  cookie=0x0, duration=1893.173s, table=0, n_packets=6360,
>>>> n_bytes=649693, idle_age=4,
>>>> priority=40000,in_port=3,dl_src=02:00:c0:a8:02:32 actions=NORMAL
>>>>  cookie=0x0, duration=4295.078s, table=0, n_packets=1444549,
>>>> n_bytes=3534959110, idle_age=0, priority=0 actions=NORMAL
>>>>  cookie=0x0, duration=1893.208s, table=0, n_packets=2, n_bytes=84,
>>>> idle_age=1870, priority=45000,arp,in_port=3,dl_src=02:00:c0:a8:02:32
>>>> actions=drop
>>>>  cookie=0x0, duration=1893.189s, table=0, n_packets=11, n_bytes=462,
>>>> idle_age=559,
>>>> priority=46000,arp,in_port=3,dl_src=02:00:c0:a8:02:32,arp_spa=192.168.2.50
>>>> actions=NORMAL
>>>>  cookie=0x0, duration=1893.139s, table=0, n_packets=0, n_bytes=0,
>>>> idle_age=1893, tcp,dl_vlan=2,dl_dst=02:00:c0:a8:02:32,tp_dst=80 actions=drop
>>>>  cookie=0x0, duration=1893.156s, table=0, n_packets=0, n_bytes=0,
>>>> idle_age=1893, priority=39000,in_port=3 actions=drop
>>>>
>>>> is it correct? I can see the relevant rule here:
>>>>  cookie=0x0, duration=1893.139s, table=0, n_packets=0, n_bytes=0,
>>>> idle_age=1893, tcp,dl_vlan=2,dl_dst=02:00:c0:a8:02:32,tp_dst=80 actions=drop
>>>> but packets never pass thru this rule (n_packets=0), and port 80 is not
>>>> blocked.
>>>>
>>>> ➜  ~  curl -s http://192.168.2.50 -o /dev/null && echo success
>>>> success
>>>>
>>>> If anyone can help :)
>>>> what am I missing?
>>>>
>>>> Best regards
>>>>
>>>>
>>>> --
>>>> Edouard Bourguignon
>>>>
>>>
>>>
>>>
>>> --
>>> Edouard Bourguignon
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opennebula.org
>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>
>>>
>>
>>
>> --
>> Jaime Melis
>> Project Engineer
>> OpenNebula - Flexible Enterprise Cloud Made Simple
>> www.OpenNebula.org | jmelis at opennebula.org
>>
>
>
>
> --
> Edouard Bourguignon
>
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>

-- 
Jaime Melis
Project Engineer
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | jmelis at opennebula.org
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