From: Martin Casado <casado-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org>
To: Jamal Hadi Salim <jhs-jkUAjuhPggJWk0Htik3J/w@public.gmane.org>
Cc: dev-yBygre7rU0TnMu66kgdUjQ@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Herbert Xu
<herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>,
David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Subject: Re: [GIT PULL v2] Open vSwitch
Date: Mon, 28 Nov 2011 07:27:22 -0800 [thread overview]
Message-ID: <4ED3A85A.1030003@nicira.com> (raw)
In-Reply-To: <1322488954.7338.66.camel@mojatatu>
>> However, what's more worrying for me right now is the gaping
>> DoS opportunities that exist in the patch as is.
>>
>> In particular, the whole design principle of punting all new
>> flows to user-space is an excellent way of attacking the system.
> Indeed this is an issue with openflow in general.
> The general solution is to rate limit how much goes to the controller
> but even that is insufficient.
>
This is a common misunderstanding about OpenFlow. It does not require
the first packet of each flow to go to the controller. In fact, no
production system I'm aware of does this. Generally OpenFlow-based
solutions targeted at large environments (e.g. data center, or WAN)
send only traditional control traffic to the controller (e.g. BGP or
OSPF), or none at all.
.martin
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Casado
Nicira Networks, Inc.
www.nicira.com
cell: 650-776-1457
~~~~~~~~~~~~~~~~~~~~~~~~~~~
next prev parent reply other threads:[~2011-11-28 15:27 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-21 21:30 [GIT PULL v2] Open vSwitch Jesse Gross
[not found] ` <1321911029-20707-1-git-send-email-jesse-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org>
2011-11-21 21:30 ` [PATCH v2 1/5] genetlink: Add genl_notify() Jesse Gross
2011-11-21 21:30 ` [PATCH v2 2/5] genetlink: Add lockdep_genl_is_held() Jesse Gross
2011-11-21 21:30 ` [PATCH v2 3/5] genetlink: Add rcu_dereference_genl and genl_dereference Jesse Gross
2011-11-21 21:30 ` [PATCH v2 4/5] vlan: Move vlan_set_encap_proto() to vlan header file Jesse Gross
2011-11-21 21:30 ` [PATCH v2 5/5] net: Add Open vSwitch kernel components Jesse Gross
[not found] ` <1321911029-20707-6-git-send-email-jesse-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org>
2011-11-21 21:59 ` Stephen Hemminger
[not found] ` <20111121135955.571254b1-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2011-11-21 23:18 ` Jesse Gross
[not found] ` <CAEP_g=8uoq7tJjUTAC_Sp3kOYwZJuKjD3J7Ratu67Kq56ZiyYA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-21 23:25 ` Stephen Hemminger
[not found] ` <20111121152518.79e82eb8-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2011-11-21 23:49 ` Michał Mirosław
2011-11-21 22:12 ` Stephen Hemminger
[not found] ` <20111121141235.71a5f8fd-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2011-11-21 23:23 ` Jesse Gross
2011-11-22 0:27 ` Stephen Hemminger
2011-11-22 17:03 ` Jesse Gross
2011-11-22 20:50 ` [GIT PULL v2] Open vSwitch David Miller
2011-11-22 23:18 ` Stephen Hemminger
[not found] ` <20111122151854.198da33d-We1ePj4FEcvRI77zikRAJc56i+j3xesD0e7PPNI6Mm0@public.gmane.org>
2011-11-23 5:34 ` Chris Wright
2011-11-23 7:54 ` Herbert Xu
[not found] ` <20111123075433.GA7928-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2011-11-23 8:12 ` Eric Dumazet
2011-11-23 8:21 ` Herbert Xu
2011-11-23 12:47 ` jamal
2011-11-23 12:55 ` Eric Dumazet
2011-11-23 13:44 ` Jamal Hadi Salim
2011-11-23 16:05 ` John Fastabend
[not found] ` <4ECD19AC.8090505-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2011-11-24 13:19 ` Jamal Hadi Salim
2011-11-27 19:34 ` Lennert Buytenhek
[not found] ` <20111127193438.GV795-OLH4Qvv75CYX/NnBR394Jw@public.gmane.org>
2011-11-27 21:31 ` jamal
2011-11-23 13:13 ` David Täht
[not found] ` <4ECCF17D.5020509-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-11-23 13:36 ` jamal
2011-11-23 14:15 ` Eric Dumazet
2011-11-24 13:04 ` Jamal Hadi Salim
2011-11-27 14:14 ` WANG Cong
2011-11-23 12:22 ` jamal
2011-11-28 13:04 ` Herbert Xu
[not found] ` <20111128130409.GB16828-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2011-11-28 13:54 ` Fischer, Anna
[not found] ` <0199E0D51A61344794750DC57738F58E7586A74137-1IhDuF6AwYvulpxXP3Mx0dVKv6DIAtwysh7EHKopUjU@public.gmane.org>
2011-11-28 14:07 ` Issues with openflow protocol WAS(RE: " Jamal Hadi Salim
2011-11-28 18:44 ` Justin Pettit
[not found] ` <20124540-D566-41B0-B86F-0BCA19B948AA-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org>
2011-11-28 18:54 ` Fischer, Anna
2011-11-28 22:55 ` Jamal Hadi Salim
2011-11-28 16:04 ` Ben Pfaff
[not found] ` <20111128160400.GB6349-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org>
2011-11-28 18:52 ` Fischer, Anna
2011-11-28 14:51 ` Herbert Xu
[not found] ` <20111128145157.GA17678-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2011-11-30 6:21 ` Jesse Gross
2011-11-30 7:02 ` Herbert Xu
[not found] ` <20111130070219.GB32630-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2011-12-01 7:24 ` Simon Horman
2011-12-01 7:52 ` Herbert Xu
[not found] ` <20111201075237.GA12799-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2011-12-01 8:06 ` Simon Horman
2011-12-02 23:00 ` Jesse Gross
2011-11-28 14:02 ` Jamal Hadi Salim
2011-11-28 15:27 ` Martin Casado [this message]
2011-11-28 15:32 ` [ovs-dev] " Jamal Hadi Salim
2011-11-28 15:50 ` Martin Casado
2011-11-28 16:01 ` Ben Pfaff
[not found] ` <20111128160117.GA6349-l0M0P4e3n4LQT0dZR+AlfA@public.gmane.org>
2011-11-28 22:21 ` Jamal Hadi Salim
2011-11-28 23:14 ` [ovs-dev] " Ben Pfaff
2011-11-30 6:18 ` Jesse Gross
2011-11-30 7:06 ` Herbert Xu
[not found] ` <CAEP_g=-+F8bpkb8Qe1bPk65PQVNxz+VO7NoUrBCw6=GDUFbOFg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-11-30 13:23 ` jamal
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