> On Apr 12, 2022, at 6:36 AM, Timothe Litt <l...@acm.org> wrote:
>
>
> On 12-Apr-22 01:46, Philip Prindeville wrote:
>> Does anyone use LOC RR's? And if so, how?
>>
>> I've had some Apple devices get seriously confused by their location
>> services and I'm trying to provide strong hints.
>>
>> It would also be nice to prime WiFi 6 Certified WAPs with their locations
>> based on LOC RR's since we happen to have convenient infrastructure to do
>> exactly that.
>>
>> Thanks.
>>
>>
> LOC RR's are not currently very popular. But I have some where they provide
> different locations from geolocation services based on IP address. Google,
> for one, reports the city from the LOC record in preference to data
> associated with the IP address. I haven't looked recently, but last time I
> looked, the geolocation services' use of LOC was spotty. Some used LOC,
> other's didn't. For them, it's pretty cheap to mine WHOIS and address block
> assignments; doing a DNS lookup for each address (and walking up the tree on
> a miss) gets expensive fairly fast.
>
> There are some concerns with overly precise LOC records - great if you want a
> shopper to to show up at your store, perhaps less so if you run a shelter or
> secure facility. I've been known to intentionally misplace LOC records so
> that they're good enough for routing, census, and other coarse applications,
> but not accurate enough for navigation.
>
> With respect to part 2: You might also consider that GPS receivers are cheap
> (every cellphone has one) and retail USB receivers are easily found at less
> than $20. This may be a better choice than LOC records. GPS tells you where
> you are; LOC tells everyone else...
>
> HTH
>
> Timothe Litt
> ACM Distinguished Engineer
> --------------------------
> This communication may not represent the ACM or my employer's views,
> if any, on the matters discussed.
>
That's where things get interesting with WiFi 6 Certified Location: it's
potentially accurate to a few centimeters if it's done correctly.
I have Ubiquiti UAP-AC-Pro's which don't support this feature, but could if
Ubiquiti bothered to add the functionality (it's not on their roadmap as far as
I can tell).
In my case, I do split-horizon for my domain in-house and use RFC-1918
addresses, so leaking them with the internet would be pointless anyway.
I'm doing the LOC record matching the domain for now.
I could have LOC records for the WAP's to pre-provision them, but like I said,
Ubiquiti isn't caught up yet.
-Philip
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