[atlas] Spoofing the source IP address from a probe?

Alex Saroyan wrote on 7/18/13 8:53 AM:
> Hi,
> 
> I think some hosts would like theirs probes to be used for "source IP
> spoofing" check, and only such probes could be used for this particular
> type of check.
> If RIPE Atlas team implement such features then probably many hosts will
> "enable" "Source IP spoofing check ability" on theirs probes and that
> can serve for community at the end.

I support this point of view. I think controlled (anti-)spoofing
measurements performed by the RIPE NCC with the consent of participating
probes would be a good service to the community. I understand that a
certain percentage of probes is sitting behind NAT where spoofing won't
work in most cases, but there is hopefully a significant number of
probes that are connected directly.

Regarding the problem itself we are tackling here, we published a follow
up to the panel we held at RIPE66:
http://www.internetsociety.org/doc/anti-spoofing-continuing-dialogue.
Hope this helps raising awareness of the issue further.


> Of course overall mechanism should be in a way not make anyone to
> suspect that probe can do spoofing by default or probe can do any
> harmful thing.
>

Agree,

Andrei


> Alex Saroyan
> 
> On 06/12/2013 10:37 PM, Daniel Karrenberg wrote:
>> On 12.06.2013, at 17:44 , Joe Provo <jzp-ripe at rsuc.gweep.net> wrote:
>>
>>> I would encourage those in the community who wish to be
>>> performing individual spoof testing (or instruct others how
>>> to do so) to use the easy-peasey pointy-clicky CAIDA/CSAIL
>>> tool: http://spoofer.cmand.org/
>>> (also spoofer.csail.mit.edu, spooftest.net, etc etc)
>> Seconded. Using this something like this  is a conscious decision of
>> the user. I have personally run Robert Beverley's probes regularly for
>> many years and I am proud to say that both my broadband providers have
>> never allowed source address spoofing. This involves a conscious
>> decision on my part taking into account local network etiquette, my
>> relation to my providers and the local legal situation. It is very
>> very different from the RIPE community deciding to use RIPE Atlas to
>> do this from my network.
>>
>> Daniel
> 
>