[AusNOG] Google DNS

Tue Oct 14 14:50:40 EST 2014

The issues with Open Resolvers and  Geo location & CDN's has been solved a
while ago by implementing Edns client-subnet. Also see:
http://www.afasterinternet.com/
OpenDNS & Google support this as well as most major CDN's.  Just this
summer akamai agreed to implement this with opendns:
https://gigaom.com/2014/06/03/akamai-signs-deal-with-opendns-to-make-the-web-faster/

Cheers,
 Andree

On Mon, Oct 13, 2014 at 2:29 PM, Joshua D'Alton <joshua at railgun.com.au>
wrote:

> Yes true but I was suggesting open dns more from network operators point
> of view. And if they already use google dns then they already aren't using
> local akamai can etc
>
> I.e if you had both google then replace one with open dns and avoid issues
> like last night
>
> sent from a potato
> On 14/10/2014 7:40 am, "Mark ZZZ Smith" <markzzzsmith at yahoo.com.au> wrote:
>
>>
>> >________________________________
>> > From: Joshua D'Alton <joshua at railgun.com.au>
>> >To: Brad Peczka <brad at bradpeczka.com>
>> >Cc: "ausnog at ausnog.net" <ausnog at ausnog.net>
>> >Sent: Tuesday, 14 October 2014, 1:26
>> >Subject: Re: [AusNOG] Google DNS
>> >
>> >
>> >
>> >I noticed that too. Looks like they are trunking the traffic back to US
>> nodes, Asia nodes probably got out of sync or crashed.
>> >
>> >
>> >OpenDNS appears to be weathering the increased load, people that want
>> local DNS can try switch their 8.8.8.8 to 208.67.222.222  (might be smart
>> long term anyway, to have 2 different upstream DNSs, and with ODNS being on
>> Equinix syd no reason why not).
>> >
>>
>> Actually, your ISP's DNS resolvers are better to use, so that e.g., their
>> local Akamai cluster or other local CDN servers are used.
>>
>> Lower DNS lookup latency can be another reason to use your ISP's
>> resolvers, in particular if you aren't located in Sydney where the ODNS
>> (and Google?) resolvers are and your ISP has resolvers in your state.
>>
>> These papers (both by people who really know what they're talking about,
>> look them up) suggest a latency target of 100ms to make a system feel like
>> it is responding instantly.
>>
>> http://www.nngroup.com/articles/response-times-3-important-limits/
>>
>> http://www.stuartcheshire.org/papers/LatencyQuest.html
>>
>>
>> I think for a web page, that would mean a maximum of 100ms between when
>> the user pushes the enter key after typing the URL or clicking on it and
>> when the page starts appearing in the browser. So that means there is a
>> 100ms total budget for at least the DNS query and response, the 3 way TCP
>> hand-shake, and then at least one or more TCP segments carrying the first
>> pieces of page data that can be displayed. I don't know what is typical,
>> however I think it is fair to assume that there would be at least 3 TCP
>> segments carrying web page data that need to be received before the browser
>> starts displaying the page (if somebody knows better, I'm interested to
>> know). So that means 8 packets sent and received before the page starts
>> being rendered. 100ms divided by 8 equals 12.6 ms per second maximum trip
>> time for each packet, so the DNS query and response should be complete
>> within 25 ms. Of course, for the whole page to appear 'instant' all of it's
>> content must
>>  start appearing with 100ms, which might be more of a challenge when it
>> is built using content from many sources e.g., Ad servers, embedded
>> analytics scripts etc.
>>
>> IIRC, ADSL with interleaving enabled (typical) accounts for around 10ms
>> one way (my ADSL with it disabled is about 3.5ms one way), so of that 12.6
>> ms per packet maximum budget, there isn't much left after your DNS query
>> reaches your ISP.
>>
>> If you want to measure your DNS query time, the 'dig' utility prints it
>> at the bottom.
>>
>>
>> >
>> >
>> >
>> >
>> >On Mon, Oct 13, 2014 at 10:30 PM, Brad Peczka <brad at bradpeczka.com>
>> wrote:
>> >
>> >Up here as well.
>> >>
>> >>Though - did anyone else see a bunch of hops just disappear?
>> >>
>> >>Regards,
>> >>-Brad.
>> >>________________________________________
>> >>From: AusNOG [ausnog-bounces at lists.ausnog.net] On Behalf Of Rhys Cuff
>> (Latrobe I.T) [rhys at latrobeit.com.au]
>> >>Sent: Monday, 13 October 2014 7:29 PM
>> >>To: ausnog at ausnog.net
>> >>Subject: Re: [AusNOG] Google DNS
>> >>
>> >>Back for me...
>> >>
>> >>
>> >>
>> >>Sent from my iPad
>> >>
>> >>On 13 Oct 2014, at 10:26 pm, "Rhys Cuff (Latrobe I.T)" <
>> rhys at latrobeit.com.au<mailto:rhys at latrobeit.com.au>> wrote:
>> >>
>> >>I didn't get out the door, both routers were still fanging it so I
>> figured it wasn't that bad,,,
>> >>Normally my phone would ring before I got anywhere near a terminal
>> too... ;-(
>> >>
>> >>
>> >>
>> >>Sent from my iPad
>> >>
>> >>On 13 Oct 2014, at 10:20 pm, "Tim Raphael" <raphael.timothy at gmail.com
>> <mailto:raphael.timothy at gmail.com>> wrote:
>> >>
>> >>I did the same thing - turned right back around having just left home!
>> >>
>> >>On Mon, Oct 13, 2014 at 7:18 PM, Rhys Cuff (Latrobe I.T) <
>> rhys at latrobeit.com.au<mailto:rhys at latrobeit.com.au>> wrote:
>> >>That's something I thought is never see!
>> >>I ping that every 30 seconds to check for connectivity outside my
>> network.
>> >>I did the mad dash scramble for nothing this time ;-)
>> >>
>> >>
>> >>
>> >>Sent from my iPad
>> >>
>> >>On 13 Oct 2014, at 10:12 pm, "ANSA SERVERS" <info at ausnetservers.net.au
>> <mailto:info at ausnetservers.net.au>> wrote:
>> >>
>> >>Yeah, 8.8.8.8 and 8.8.4.4 is down here in Victoria & Sydney
>> >>
>> >>Regards,
>> >>
>> >>Matthew Matters  Managing Director / CEO of Aus Net Servers Australia
>> Pty Ltd
>> >>Management Department  |  Small Business Hosting Sales & Services  |
>> Aus Net Servers Australia Pty Ltd
>> >>P  1300 933 038  |  M  0428 028 091  |  E
>> mmatters at ausnetservers.net.au<mailto:mmatters at ausnetservers.net.au> |
>> W  www.ausnetservers.net.au<http://www.ausnetservers.net.au/>
>> >>ABN 25 162 013 194 | ACN 162 013 194 | ARBN B2318 229M | #1 For
>> Dedicated Hosting Solutions For Small Business Since 2007
>> >>
>> >>From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of
>> Rhys Cuff (Latrobe I.T)
>> >>Sent: Monday, 13 October 2014 10:12 PM
>> >>To: ausnog at ausnog.net<mailto:ausnog at ausnog.net>
>> >>Subject: [AusNOG] Google DNS
>> >>
>> >>Hey Guys
>> >>
>> >>Has anyone notice Google DNS (8.8.8.8) has stoped working and replying
>> to pings?
>> >>Seems to be the same with the two providers I use.
>> >>
>> >>Thanks
>> >>
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