[AusNOG] DNS problems resolving sync.deakin.edu.au

[John Mann]

Joseph,

If it was DNS propagation, then wouldn't the users be getting the old
addresses, rather than NXDOMAIN.

There is a chain of CNAMES ...
---
$ host sync.deakin.edu.au
sync.deakin.edu.au is an alias for sync.global.deakin.edu.au.
sync.global.deakin.edu.au is an alias for sync.deakin.edu.au.edgekey.net.
sync.deakin.edu.au.edgekey.net is an alias for e7158.dsca.akamaiedge.net.
e7158.dsca.akamaiedge.net has address 23.53.136.100
e7158.dsca.akamaiedge.net has IPv6 address 2001:8006:3510:1297::1bf6
e7158.dsca.akamaiedge.net has IPv6 address 2001:8006:3510:12a9::1bf6
---
but it's not longer than
---
$ host www.deakin.edu.au
www.deakin.edu.au is an alias for www.global.deakin.edu.au.
www.global.deakin.edu.au is an alias for deakin.edu.au.edgekey.net.
deakin.edu.au.edgekey.net is an alias for e7158.a.akamaiedge.net.
e7158.a.akamaiedge.net has address 23.53.136.100
---

One Aussie Broadband user reported that when they were opted out from
CGNAT, things started working for them.

Thanks,
    John

On Wed, 28 Nov 2018 at 15:52, Saxton, Joseph (SYD-FED) <
Joseph.Saxton at interpublic.com> wrote:

> If it’s only changed recently then I’d say DNS propagation
>
>
>
> *From: *AusNOG <ausnog-bounces at lists.ausnog.net> on behalf of John Mann <
> john at mannfamily.org>
> *Date: *Wednesday, 28 November 2018 at 3:44 pm
> *To: *"AusNOG at lists.ausnog.net" <AusNOG at lists.ausnog.net>
> *Subject: *[EXTERNAL] [AusNOG] DNS problems resolving sync.deakin.edu.au
>
>
>
> Hi,
>
>
>
> Deakin University recently dual-stacked their Akamai cache for
> sync.deakin.edu.au
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__sync.deakin.edu.au&d=DwMFaQ&c=Ftw_YSVcGmqQBvrGwAZugGylNRkk-uER0-5bY94tjsc&r=srheiojgNn4Jg0keeQ9hj6cyp8zgHx0m-eTRLdD3nnw&m=aVUTlDm-TpQmLPh8GYduaIdrwFkUij4wtBrv-X9yJz4&s=oyHoAo4mklGmb_jm-rzKYPvvofKEu68LWO4doCFkURg&e=>
> .
>
>
>
> Since them, some students using a couple of ISPs can't resolve the DNS
> name.
>
> For example:
>
> ---
>
> > nslookup sync.deakin.edu.au
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__sync.deakin.edu.au&d=DwMFaQ&c=Ftw_YSVcGmqQBvrGwAZugGylNRkk-uER0-5bY94tjsc&r=srheiojgNn4Jg0keeQ9hj6cyp8zgHx0m-eTRLdD3nnw&m=aVUTlDm-TpQmLPh8GYduaIdrwFkUij4wtBrv-X9yJz4&s=oyHoAo4mklGmb_jm-rzKYPvvofKEu68LWO4doCFkURg&e=>
>
> Server:  belong.gateway
>
> Address:  10.0.0.138
>
>
>
> *** belong.gateway can't find sync.deakin.edu.au
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__sync.deakin.edu.au&d=DwMFaQ&c=Ftw_YSVcGmqQBvrGwAZugGylNRkk-uER0-5bY94tjsc&r=srheiojgNn4Jg0keeQ9hj6cyp8zgHx0m-eTRLdD3nnw&m=aVUTlDm-TpQmLPh8GYduaIdrwFkUij4wtBrv-X9yJz4&s=oyHoAo4mklGmb_jm-rzKYPvvofKEu68LWO4doCFkURg&e=>:
> Non-existent domain
>
> ---
>
> "blogs.deakin.edu.au
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__blogs.deakin.edu.au&d=DwMFaQ&c=Ftw_YSVcGmqQBvrGwAZugGylNRkk-uER0-5bY94tjsc&r=srheiojgNn4Jg0keeQ9hj6cyp8zgHx0m-eTRLdD3nnw&m=aVUTlDm-TpQmLPh8GYduaIdrwFkUij4wtBrv-X9yJz4&s=yFkD80CkEe2Z-d4Pp3L8fWNbGaFEpnm7FGr0j6Jy6bc&e=>"
> is setup similarly to "sync.deakin.edu.au
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__sync.deakin.edu.au&d=DwMFaQ&c=Ftw_YSVcGmqQBvrGwAZugGylNRkk-uER0-5bY94tjsc&r=srheiojgNn4Jg0keeQ9hj6cyp8zgHx0m-eTRLdD3nnw&m=aVUTlDm-TpQmLPh8GYduaIdrwFkUij4wtBrv-X9yJz4&s=oyHoAo4mklGmb_jm-rzKYPvvofKEu68LWO4doCFkURg&e=>"
> but that does work.
>
>
>
> If the user changes their DNS server to 8.8.8.8 or 1.1.1.1 then they do
> get through.
>
>
>
> Problematic ISPs include:
>
>    Belong
>
>    Aussie Broadband
>
>    ...
>
> I've tried the frontline technical support numbers, but didn't make much
> headway.
>
>
>
> Does anyone know how/why this DNS problems would be happening?
>
>
>
> Can some technical support people from ABB and Belong please contact me?
>
>
>
> Thanks,
>
>      John Mann
>
>      0419 568 470
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