[Starlink] fiber IXPs in space

[David Fernández]

PEPs have been mentioned as an example of so called stealth optimization.

Another example, I think it is IGMP snooping:
https://en.wikipedia.org/wiki/IGMP_snooping

So, well, maybe this so called DNS stealth optimization is not so bad,
if it really is easy to implement and it brings benefits (RTT by
half), but pros and cons should be carefully evaluated.

Regards,

David

2023-04-17 21:00 GMT+02:00, David Lang <david at lang.hm>:
> On Mon, 17 Apr 2023, Rodney W. Grimes wrote:
>
>>> On Sun, 16 Apr 2023, David Fern?ndez via Starlink wrote:
>>>
>>>> The idea would be that the satellite inspects IP packets and when it
>>>> detects a DNS query, instead of forwarding the packet to ground
>>>> station, it just answers back to the sender of the query.
>>>
>>> This would be a bad way to implement it. You don't want to override
>>> queries to
>>> other DNS servers, but it would be very easy to create an anycast address
>>> that
>>> is served by the satellites.
>>
>> Yes, and the later is what I proposed, the idea of intercepting
>> someone ELSE'S anycast address and processing it would be
>> wrong in many ways, in effect a Man In the Middle attack
>> as stated else where.
>
> I was assuming that it would be done in coordination with the existing user,
> not
> as a stealth optimization. I should have made that clear.
>
> David Lang
>