Strange DNS problems on TC/VF cable

Forums › One New Zealand (including Vodafone, WxC, Farmside) › Strange DNS problems on TC/VF cable

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#1112546 21-Aug-2014 07:10

The first basic step would be to post the sites so others can check.

As mentioned above issues with the cache have become infamous over the years - but after checking with a couple of people yesterday it seems nobody has been encountering any issues in the last few weeks.

jamesmcd

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#1112585 21-Aug-2014 08:22

Ok, here are some URLs. Can people in Wellington using cable check them a couple of times to see if they have issues bringing them up? In theory the page load will hang until it times out, and it will then have a second go and get it. In saying that, people might get lucky...

fluxmedia.co.nz
digicake.com
24thousand.com
monkey101.co.nz

That should be enough to hopefully replicate the issue.

itxtme

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#1112651 21-Aug-2014 09:45

All of these loaded for me, however they hung for approx 30 seconds before they did. Now when I click any of the sites they responds instantly, weird.

fluxmedia.co.nz
digicake.com
24thousand.com
monkey101.co.nz

Pinging fluxmedia.co.nz [103.29.85.220] with 32 byte
Reply from 103.29.85.220: bytes=32 time=78ms TTL=53
Reply from 103.29.85.220: bytes=32 time=43ms TTL=53
Reply from 103.29.85.220: bytes=32 time=42ms TTL=53
Reply from 103.29.85.220: bytes=32 time=44ms TTL=53

Ping statistics for 103.29.85.220:
Packets: Sent = 4, Received = 4, Lost = 0 (0% lo
Approximate round trip times in milli-seconds:
Minimum = 42ms, Maximum = 78ms, Average = 51ms

** On Cable Lower Hutt

jamesmcd

62 posts

Master Geek

#1112654 21-Aug-2014 09:52

Yup that's exactly the problem, the first attempt will effectively fail and you will see it reload (you won't see an error message though). Upon reload after 30 seconds you'll get the site. It will work well for about 5-10 minutes (sometimes more), however once it goes out of your browser's cache (I'm assuming) it will then do the fail thing again. Can you try using another browser and see if it happens again?

itxtme

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#1112729 21-Aug-2014 11:38

Yep tried fluxmedia in firefox this time (vs Opera) and it took 44.59sec to load the site, now its responding normally in the browser, and in all browsers. For clarity, visit in Firefox 44 seconds, then immediately use Opera, Chrome and IE and it loads instantly.

waikariboy

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#1112734 21-Aug-2014 11:51

i too have notice something like this on my connection, need to change DNS server to google to fix it. Was thinking it was me. Could it be the router im using??

Balm its gone!

Glassboy

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#1112735 21-Aug-2014 11:52

Looks to me like a whole bunch of these "GET /webpagethumbnail?c=63&d=https://www.facebook.com/&r=4&s=140:80&a=_nETgVaBinHu50KyYAN_UB97-bo HTTP/1.1" are slowing down the initial page display for flux media.

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jamesmcd

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#1112746 21-Aug-2014 12:20

Glassboy: Looks to me like a whole bunch of these "GET /webpagethumbnail?c=63&d=https://www.facebook.com/&r=4&s=140:80&a=_nETgVaBinHu50KyYAN_UB97-bo HTTP/1.1" are slowing down the initial page display for flux media.

More an issue of site optimisation - looks like a social plugin of some sort. Tidying all that up is in the pipeline, but in any case it doesn't explain why ~80-100 sites in this IP range are failing their initial load on cable.

nutbugs

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#1112772 21-Aug-2014 12:44

On cable in Kapiti and can confirm I see the same issue for these sites.

jamesmcd

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#1112790 21-Aug-2014 12:48

nutbugs: On cable in Kapiti and can confirm I see the same issue for these sites.

Thanks for checking - it's driving me crazy, I can't figure out if it's an issue with the IP range (Sydney) or WebDrive who provide my nameserver services. I don't suppose there are any Vodaclear guys on the forum who can take a look?

jamesmcd

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#1113396 22-Aug-2014 11:39

Any other ideas?

sbiddle

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#1113405 22-Aug-2014 12:09

Nope.

Ultimately the cause is something on those sites is clearly causing an issue with the transparent proxy and something that's being served from a CDN. Changing the DNS gets around it because it won't give the same results for lookups for some CDN content.

I'm sure Vodafone will argue something on the site is broken which is causing this issue, and ultimately it's going to be up to you to convince them otherwise.

jamesmcd

62 posts

Master Geek

#1113773 22-Aug-2014 21:48

sbiddle:

I'm sure Vodafone will argue something on the site is broken which is causing this issue, and ultimately it's going to be up to you to convince them otherwise.

Yeah could be difficult... and I suppose it makes no difference to them that it works perfectly with every other ISP in the world :(

sbiddle

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#1113901 23-Aug-2014 08:57

jamesmcd:
sbiddle:

I'm sure Vodafone will argue something on the site is broken which is causing this issue, and ultimately it's going to be up to you to convince them otherwise.

Yeah could be difficult... and I suppose it makes no difference to them that it works perfectly with every other ISP in the world :(

Which doesn't mean the ISP is at fault. There is clearly a combination of code on the sites and the cache causing the issue. Who's at fault? That's not a simple question to answer.

jamesmcd

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#1113903 23-Aug-2014 09:07

K, thanks for the advice. I'll do some testing this weekend and see if I can identify the exact issue - at least on my end.

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