Re: [OPSEC] OPSEC control plane protection draft

>> What about if we add this in the Design
>> Trade-Off section to address the concern so we will be more precise.
>>
>> *In addition to the traffic matching explicit classes care should be
>> taken on the policy decision that governs the handling of
>> traffic that
>> would fall through the policy.
> Do we need to say that by convention there is no default deny at the end of a cpp policy?
>
>

Another good catch...how about this:

....Typically that traffic is referred to as traffic falling in the 
default class. It may also be traffic that matches a generic protocol 
specific class where previous classes that have more granular matching 
did not match all packets for that specific protocol. The ideal policy 
would have explicit classes to match only the traffic specifically 
required at the control plane and drop all other traffic. *As most 
vendor implementations permit all traffic hitting the default class an 
explicit drop action would need to be configured in the policy such that 
the traffic hitting that default class would be dropped versus being 
delivered up to the control plane.* This approach requires rigorous 
traffic pattern identification such that a default drop policy does not 
break existing functionality of the device.....

>> after monitoring the traffic matching the default class
>> explicit classes
>> should be defined such that the default class could be configured to
>> drop traffic falling through the policy.*
>
> Can we add a COMMENTED OUT deny ip any any in the default policy with a
> "do not enable until throughly tested in production ..." type statement.
>

I would prefer we cover it in the text section because that would make 
it harder to link the Legitimate Traffic (Section 3.1) definition to the 
actual configuration in the document.

Rodney

>>
>>
>> Rodney
>>
>>
>>
>> On 8/16/10 9:58 PM, Christopher Morrow wrote:
>>> On Mon, Aug 16, 2010 at 9:34 PM, Rodney
>> Dunn<rodunn@cisco.com>   wrote:
>>>> Donald,
>>>>
>>>> First thanks for the comment. It's a good one. We actually
>> originally had it
>>>> with a default drop for the all IP and default classes.
>> However, after a
>>>> good bit of discussion we (both Cisco and Juniper) felt
>> that we should
>>>> soften it up just a bit. We agreed to add the explicit
>> match for the ALLIP
>>>> class so it could be monitored and then tightened down further.
>>>>
>>>> We realized there were various opinions on how that should be done.
>>>
>>> can we get a 'first verify complete COPP coverage, then deny all
>>> remaining traffic with $INSERT_PROPER_DENY_HERE' paragraph?
>>>
>>> It sounds like someone with a legal degree got to your final
>>> recommendation :) that, operationally, leaves the network
>> with a whole
>>> to plug, and I can guarantee that someone with a scanning virus is
>>> gonna fill it for you :(
>>>
>>> -chris
>>>
>>>> ie:
>>>>
>>>> http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html
>>>>
>>>>
>>>> Thanks,
>>>> Rodney
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 8/16/10 5:16 PM, Smith, Donald wrote:
>>>>>
>>>>> For undesirables in JTK's paper here he specifically did
>> a deny ip any any
>>>>> at the end of the cpp policy for that.
>>>>>
>>>>> http://aharp.ittns.northwestern.edu/papers/copp.html
>>>>>
>>>>> The default term for juniper is log and discard.
>>>>>
>>>>> There isn't a deny ip any any in the draft.
>>>>>
>>>>>
>>>>>
>>>>> (coffee != sleep)&     (!coffee == sleep)
>>>>> Donald.Smith@qwest.com gcia
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: opsec-bounces@ietf.org [mailto:opsec-bounces@ietf.org]
>>>>>> On Behalf Of Rob Bird
>>>>>> Sent: Friday, March 26, 2010 11:28 AM
>>>>>> To: David Dugal
>>>>>> Cc: draft-dugal-opsec-protect-control-plane@tools.ietf.org;
>>>>>> opsec@ietf.org
>>>>>> Subject: Re: [OPSEC] OPSEC control plane protection draft
>>>>>>
>>>>>> This is most excellent. I was just advising a customer this
>>>>>> morning on this very issue (again).
>>>>>>
>>>>>> I look forward to working on this.
>>>>>> Rob
>>>>>>
>>>>>> -
>>>>>> Rob Bird, Chief Technology Officer
>>>>>> Red Lambda, Inc.
>>>>>> "Network security at global scale"
>>>>>> www.redlambda.com
>>>>>>
>>>>>>         On Mar 26, 2010 1:03 PM, "David Dugal"
>>>>>> <ddugal@juniper.net>     wrote:
>>>>>>
>>>>>>         -----BEGIN PGP SIGNED MESSAGE-----
>>>>>>         Hash: SHA1
>>>>>>
>>>>>>         Hi Richard.
>>>>>>
>>>>>>         Thank you very much for the scrutiny, analysis
>> and feedback.  As
>>>>>>         mentioned during my brief presentation, our hope
>> is that this
>>>>>>         recommendation by example will provide awareness of a
>>>>>> possible attack
>>>>>>         surface occasionally overlooked, especially by
>> smaller or newer
>>>>>>         installations.
>>>>>>
>>>>>>         I appreciate the feedback and will enhance the draft to
>>>>>> make reference
>>>>>>         to cryptographic security, as well as attempt to make
>>>>>> the document IP
>>>>>>         version agnostic.
>>>>>>
>>>>>>         Thank you for your support, both in carefully reading
>>>>>> the document, and
>>>>>>         for your willingness to have our draft taken under the
>>>>>> OPSEC WG wing.
>>>>>>
>>>>>>         - ---
>>>>>>         David G. Dugal                           Support:
>>>>>> +1-408-745-9500
>>>>>>         Security Incident Response Team          Direct:
>>>>>> +1-978-589-0719
>>>>>>         Juniper Networks                         Mobile:
>>>>>> +1-603-377-1162
>>>>>>         Westford, MA, USA                        PGP Key:
>> 0xAB6E02A5
>>>>>>
>>>>>>
>>>>>>         On Fri Mar 26 2010 09:06:40 GMT-0700 (Pacific Daylight
>>>>>> Time), Richard
>>>>>>         Graveman<rfgraveman@gmail.com>     proclaimed ...
>>>>>>
>>>>>>
>>>>>>         >     David,
>>>>>>         >
>>>>>>         >     I read the draft carefully after the meeting and
>>>>>> realize that my
>>>>>>         >     comments missed the...
>>>>>>
>>>>>>         >     .
>>>>>>         >
>>>>>>         -----BEGIN PGP SIGNATURE-----
>>>>>>         Version: GnuPG v1.4.10 (MingW32)
>>>>>>
>>>>>>
>> iEYEARECAAYFAkus53cACgkQh59lzatuAqVE9wCgh53mgxNRPWUztlI27aOITHRr
>>>>>>         2zMAoPb5y3phm260P1zSoDu0LSbUjNcN
>>>>>>         =kitD
>>>>>>         -----END PGP SIGNATURE-----
>>>>>>
>>>>>>
>>>>>>         _______________________________________________
>>>>>>         OPSEC mailing list
>>>>>>         OPSEC@ietf.org
>>>>>>         https://www.ietf.o...
>>>>>>
>>>>>>
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