DNS Issues

Forums › IT Pro and developers › DNS Issues

networkn

Networkn
32359 posts

Uber Geek

ID Verified

Trusted

Lifetime subscriber

#128587 15-Aug-2013 15:14

Hi There!

Anyone else having customers reporting mail bouncing in and out with domains failing to resolve name servers, mx or a records? Seems intermittent but relatively widespread. One .co.nz domain could be resolved ok by google, but not by mxtoolbox, doesn't seem to be any pattern?

Inphinity

2780 posts

Uber Geek

#878894 15-Aug-2013 15:16

Fine here, what name servers are you using?

networkn

Networkn
32359 posts

Uber Geek

ID Verified

Trusted

Lifetime subscriber

#878897 15-Aug-2013 15:18

Doesn't seem to matter, and the problem appears to be both incoming and outgoing for various customers so I presume they will use different ones, I am guessing perhaps an international link/dns issue maybe.

Inphinity

2780 posts

Uber Geek

#878898 15-Aug-2013 15:21

Is it only affecting mail? We're routing all our mail via Amazon SES, which seems to be working fine.

kiwirock

685 posts

Ultimate Geek

#878934 15-Aug-2013 16:24

Probably not related, but I made a note in the Snap forum because I've had a weird intermittent domain issue not resolving a Trade Me cname which points to awsamazon.com address for advertisements. I've been trying to figure out if it was Snap DNS, my DNS (which I replaced with another DNS server), or something weird going on above and beyond somewhere. I couldn't figure out if it's NZ or overseas that's intermittently resolving. But it hasn't seem to effect anything else but the mentioned above.

freitasm

BDFL - Memuneh
79314 posts

Uber Geek

Administrator

ID Verified

Trusted

Geekzone

Lifetime subscriber

#879266 16-Aug-2013 08:47

I think this is to broad.

You mean you have a customer's domain that is resolved in some DNS but not others? What registrar? Are you using a third party DNS provider to host those records?

gehenna

8520 posts

Uber Geek

Moderator

Trusted

Lifetime subscriber

#879273 16-Aug-2013 08:59

Some reports that Google's DNS is down at the moment. Could this be your issue?

freitasm

BDFL - Memuneh
79314 posts

Uber Geek

Administrator

ID Verified

Trusted

Geekzone

Lifetime subscriber

#879276 16-Aug-2013 09:01

The Google DNS problem seems to be happening in the last few hours, I see the post is from earlier than that but it could be related.

Tried using http://www.whatsmydns.net/ to test DNS lookups from different places?

Sharesies

Trade NZ and US shares and funds with Sharesies (affiliate link).

Zeon

3918 posts

Uber Geek

Trusted

#879283 16-Aug-2013 09:10

you can use nslookup command to test any dns server e.g. try this:

"nslookup geekzone.co.nz 8.8.8.8" will use the Google DNS rather than your default

Speedtest 2019-10-14

mattwnz

20173 posts

Uber Geek

#879371 16-Aug-2013 10:58

Who is your DNS provider as the problem will likely be with them. One of the problems I have found with using a cheap or free one that comes with the domain registrar is they can be not as reliable. People think they are saving money by going for the cheapest service, but unreliability likely costs a business a lot more than the relatively small savings that they make.

freitasm

BDFL - Memuneh
79314 posts

Uber Geek

Administrator

ID Verified

Trusted

Geekzone

Lifetime subscriber

#879372 16-Aug-2013 11:00

As above. If your customers expect a resilient and reliable business service, consider paid DNS providers such as dyn.com or at least Cloudflare (free, and CDN/security options can be turned off).