2Degrees / Snap DNS servers slow to pickup DNS changes?

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spacedog

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#279838 12-Nov-2020 08:50

Is there something going on with 2Degrees / Snap DNS servers (namely ns1 an ns2.snap.net.nz)?

I've been doing some domain changes and setup work and it's been nearly 24 hours and those servers are still returning nil results. Cloudflare and Google DNS have picked up the changes as well as Slingshot DNS.

I have to say my luck with Snap / 2degrees DNS picking up changes has been hit or miss historically. I've seen changes propagate within 30 minutes and sometimes 12 hours, but this is the first time I have seen it lag this far behind other DNS servers?

@2degreescare ?

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#2602399 12-Nov-2020 08:59

Earlier this year the DNS servers I (and others as there was a thread on it: https://www.geekzone.co.nz/forums.asp?forumid=85&topicid=272911) were being allocated new DNS servers from 2degrees. Perhaps try those:

111.69.69.68 (resovler02.2degrees.nz)
111.69.69.69 (resovler01.2degrees.nz)

timmmay

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#2602401 12-Nov-2020 09:07

I can confirm 2degrees is giving me the same IPs as nzkc.

111.69.69.68
111.69.69.69

2406:e000:c07::1
2406:e000:c07::2

spacedog

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#2602411 12-Nov-2020 09:22

Thanks - yes, those are picking up the DNS changes so it seems ns1.snap.net.nz is lagging behind.

However, that is what is automatically issued to my router / modem when I authenticate. Sure, I can go through and manually override, but I'd prefer not to.

Is there any way to get 2Degrees to fix this properly?

pwner

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#2602423 12-Nov-2020 09:40

spacedog:

Is there something going on with 2Degrees / Snap DNS servers (namely ns1 an ns2.snap.net.nz)?

I've been doing some domain changes and setup work and it's been nearly 24 hours and those servers are still returning nil results. Cloudflare and Google DNS have picked up the changes as well as Slingshot DNS.

I have to say my luck with Snap / 2degrees DNS picking up changes has been hit or miss historically. I've seen changes propagate within 30 minutes and sometimes 12 hours, but this is the first time I have seen it lag this far behind other DNS servers?

@2degreescare ?

2degrees have separated the Resolver and Authoritative functions, so NS1 and NS2 are for Authoritative, please use the new resolver servers the others have mentioned and are given out to all customers now. They should also provide better performance as they are wider distributed around the country to provide minimal latency.

Any posts are personal comments and not that of my employer

spacedog

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#2602576 12-Nov-2020 12:00

Looks like my router was not picking up the new DNS servers, but after refreshing the settings it's now pulling down

111.69.69.68
111.69.69.69

Those servers are showing the DNS change propagations that I made yesterday which is great. I would note that ns1.snap.net.nz is still not picking up any of the DNS changes I have made so there is some misalignment lag happening on the older servers. Not sure how much of a concern that is, but they do look pretty stale.

NickMack

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#2602760 12-Nov-2020 15:25

nzkc:

Earlier this year the DNS servers I (and others as there was a thread on it: https://www.geekzone.co.nz/forums.asp?forumid=85&topicid=272911) were being allocated new DNS servers from 2degrees. Perhaps try those:

111.69.69.68 (resovler02.2degrees.nz)
111.69.69.69 (resovler01.2degrees.nz)

@pwner - resovler vs. resolver for RDNS lookups :-)

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

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NickMack

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#2603025 12-Nov-2020 20:50

NickMack:

nzkc:

Earlier this year the DNS servers I (and others as there was a thread on it: https://www.geekzone.co.nz/forums.asp?forumid=85&topicid=272911) were being allocated new DNS servers from 2degrees. Perhaps try those:

111.69.69.68 (resovler02.2degrees.nz)
111.69.69.69 (resovler01.2degrees.nz)

@pwner - resovler vs. resolver for RDNS lookups :-)

Something I noticed for the new resolvers (anycast) is they are more latent for me than old ns1/2/3 anycast addresses. I added them today to smokeping - https://smokeping.thenet.gen.nz/smokeping/smokeping.cgi?target=Local.2dNSanycast. @pwner @morganbrowne - Is there a routing issue to them as I'm seeing ~19.2 ms vs ~2.5ms to old from CHCH which suggests they are going to another city?

Nick

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

NickMack

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#2604029 15-Nov-2020 12:14

NickMack:

nzkc:

Earlier this year the DNS servers I (and others as there was a thread on it: https://www.geekzone.co.nz/forums.asp?forumid=85&topicid=272911) were being allocated new DNS servers from 2degrees. Perhaps try those:

111.69.69.68 (resovler02.2degrees.nz)
111.69.69.69 (resovler01.2degrees.nz)

@pwner - resovler vs. resolver for RDNS lookups :-)

Spelling of resolver fixed, thanks.

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

hio77

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#2604046 15-Nov-2020 13:45

I've gotta ask... Was that subnet specifically picked out of 2ds ranges...

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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

NickMack

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#2604047 15-Nov-2020 13:53

hio77: I've gotta ask... Was that subnet specifically picked out of 2ds ranges...

Unknown by me :-) Hopefully @pwner will respond with respect to resolver01/02 (anycast addresses) looking like CHCH customers are transversing to Auckland given the latency of ~19 ms vs. n1.snap.net.nz for example.

Nick

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

NickMack

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#2605930 18-Nov-2020 12:04

NickMack:

hio77: I've gotta ask... Was that subnet specifically picked out of 2ds ranges...

Unknown by me :-) Hopefully @pwner will respond with respect to resolver01/02 (anycast addresses) looking like CHCH customers are transversing to Auckland given the latency of ~19 ms vs. n1.snap.net.nz for example.

Nick

Hi @pwner / @morganbrowne - Is there any comment or update on this one please?

Nick

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

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yitz

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#2605933 18-Nov-2020 12:10

Is it just for static IP customers?

NickMack

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#2605936 18-Nov-2020 12:17

yitz:

Is it just for static IP customers?

It may well be.. and potentially makes sense as the new recursive clusters are in the same locations as the CGNat appliances.

Nick

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

CutCutCut

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#2605937 18-Nov-2020 12:19

Some of this is beyond my understanding, but I have a fixed IP and in the last week or so I've had a couple of weird things, like setting up a new ipad, i got a warning that the ipad I was trying to transfer to was located in Chrsitchurch, when I am near Auckland, and then yesterday, loggin into a microsft account and getting a warning of suspicious log in from Sydney, but then when I checked, it said it was in Chrsitchurch. And now I'm having trouble connecting to my Plex server remotely. Related?

NickMack

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#2605939 18-Nov-2020 12:23

CutCutCut:

Some of this is beyond my understanding, but I have a fixed IP and in the last week or so I've had a couple of weird things, like setting up a new ipad, i got a warning that the ipad I was trying to transfer to was located in Chrsitchurch, when I am near Auckland, and then yesterday, loggin into a microsft account and getting a warning of suspicious log in from Sydney, but then when I checked, it said it was in Chrsitchurch. And now I'm having trouble connecting to my Plex server remotely. Related?

Nope/unlikley - There are many databases across the globe that think they know where specific IP addresses are geographically located. ISPs move IP addresses around based on growth/needs and therefore keeping this information up to date in all databases is problematic. The issue we are talking about was DNS changes being slow to be picked up, using the right (new) DNS servers at 2degrees and then a discussion about latency to the new DNS servers compared to the old.

Nick.

https://nick.mackechnie.co.nz | NZ ISP latency monitoring - https://smokeping.thenet.gen.nz

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