CloudFlare D.N.S. Resolvers... (1.1.1.1 & 1.0.0.1)

Blake Hudson blake at ispn.net
Wed Sep 26 18:59:20 UTC 2018


valdis.kletnieks at vt.edu wrote on 9/26/2018 1:44 PM:
> On Wed, 26 Sep 2018 10:52:07 +0300, Michael Bullut said:
>
>> Has anyone deployed the aforementioned in your individual networks? A quick
>> test suggests it is quite fast compared with Google's D.N.S. resolvers:
>> *Reply from 1.1.1.1 <http://1.1.1.1/>: bytes=32 time=3ms TTL=61*
> 3ms indicates you're hitting an instance that is fairly close by, network-wise.
>
> Looking at your traceroute:
>
> 3     7 ms    13 ms    15 ms  10.98.0.233
> 4     7 ms     5 ms     4 ms  one.one.one.one [1.1.1.1]
>
> The instance is apparently on the same subnet as your CGN exit point.  As such,
> unless CloudFlare is deploying a *lot* of anycast instances, most people are
> not going to have the joyous experience you have.
>
>  From my desktop, 1.1.1.1 is 7 network hops away, compared to 8.8.8.8's 10 hops,
> but the extra 3 hops inside AS15169 probably don't leave the building, and may
> not even leave the rack. Both are right around 6.9ms away - while *our* network
> presence there is 4 hops and also 6.9ms away and traceroute is showing jitter
> larger than the difference between our router and either DNS service...
>

I'm not a proponent of using 1.1.1.1, but CloudFlare does have a good CDN:

Pinging 1.1.1.1 with 32 bytes of data:
Reply from 1.1.1.1: bytes=32 time<1ms TTL=58
Reply from 1.1.1.1: bytes=32 time<1ms TTL=58
Reply from 1.1.1.1: bytes=32 time<1ms TTL=58
Reply from 1.1.1.1: bytes=32 time<1ms TTL=58


Tracing route to one.one.one.one [1.1.1.1]
over a maximum of 30 hops:

   1    <1 ms    <1 ms    <1 ms  xxxx
   2    <1 ms    <1 ms    <1 ms  xxxx
   3    <1 ms    <1 ms    <1 ms xxxx
   4     1 ms     1 ms     1 ms  209.152.151.8
   5     1 ms     1 ms     1 ms  38.140.136.177
   6     1 ms    <1 ms    <1 ms  38.140.136.74
   7    <1 ms    <1 ms    <1 ms  one.one.one.one [1.1.1.1]

Trace complete.


dig @1.1.1.1 cloudflare.com | grep 'Query time'
;; Query time: 1 msec
dig @1.1.1.1 nanog.org | grep 'Query time'
;; Query time: 28 msec








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