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#1 astonecipher   User is offline

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DNS Resolving oddities

Posted 11 January 2018 - 08:22 AM

Previous host tanked my server and brought it offline for a few days. In order to get clients back online, I spun a new server up with a new host.

The oddities, some sites are resolving some are not, without any differences in records that I am seeing.
Some sites are resolving, but their MX records are not.
Some sites are absolutely fine with no issues.
All have the same DNS records.


I have no clue what is going on.

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Replies To: DNS Resolving oddities

#2 ArtificialSoldier   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 10:12 AM

How long has it been since you updated DNS? Has there been plenty of time for records to propagate? If you use online DNS lookup tools do you see the same results or is it only on your network?
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#3 astonecipher   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 10:21 AM

48+ hours since updating the DNS.

DNS tools are showing the same issue, regardless of which set I use.
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#4 ArtificialSoldier   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 10:32 AM

How long has it been since you updated DNS? Has there been plenty of time for records to propagate? If you use online DNS lookup tools do you see the same results or is it only on your network?
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#5 astonecipher   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 11:49 AM

Reaching back out to tech support to see if they have a clue.

They said it was a name server issue initially, but that makes no sense. If it was all I could agree, but not just a few.
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#6 no2pencil   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 12:14 PM

Try digging against both public 8.8.8.8 (Google) & 4.2.2.1 (Verizon). It could be possible that the DNS you are using can't find them, even though they are being served correctly. I've seen Godaddy do this more than once. They do something that corrupts heir DNS records, & only Verizon can resolve them, Google has bad (or no) data.
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#7 astonecipher   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 01:22 PM

@no2 Verizon's DNS is the only one that is finding the records. Now, how can I fix it? Or can I fix it at all?
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#8 no2pencil   User is offline

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Re: DNS Resolving oddities

Posted 11 January 2018 - 03:52 PM

You'll have to call the domain registrar or whom ever hosts the nameservers, & explain the situation.

I'm really stretching here, but another thing that could be happening is that the record with Google is larger than 512 bytes, & that's all your DNS client can handle, so it's rejecting the answer. It's a protocol thing with UDP vs TCP.

You can try your dig again by forcing TCP :
dig +tcp ...

or with nslookup :
nslookup "-set vc"  ...

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#9 astonecipher   User is offline

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Re: DNS Resolving oddities

Posted 12 January 2018 - 08:06 AM

I'll wait until the domain name finishes its transfer to Route53 and work on it. My high priority clients have working email. The ancillary clients that are having issues aren't too concerned at this point, and it is donated server space, so they are not paying. Should be completed soon and I can call to find out wtf is going on!
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