Unreliable nameservers (DNS issues)

Drumrocker365

Well-Known Member
Apr 15, 2014
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Hi,

I was hoping to maybe get some advice on a long ongoing issue with my cPanel server. The DNS has been acting up off and on for months. Any sites that point to my nameservers have very spotty uptime (some days as bad as 50% or less). And also, they appear to work on some ISP's more than others. I've had good luck with my ISP, where my neighbors cannot access it with theirs. Running a propagation test on one of my domains (Global DNS Propagation Checker - What's My DNS?), I see that only a couple servers can seem to trace the nameserver to the server IP. Also, using an "Is it down" service shows the website as offline. Furthermore, I have a StatusCake test that runs, which proves my point of spotty uptime. It's constantly up for a few minutes, down for a few minutes, up, down, etc. I went back and "re-traced" my steps of creating a nameserver and ensured the A record is added, and that the nameservers are registered with my registrar (Namecheap).

I have a couple sites that I use CloudFlare on, and those sites have a 99.9% uptime with no issues, so it's definitely an issue with my nameservers.

While I could just tell my clients who use my nameservers that they must use CloudFlare, I'd rather get to the roof of the problem and know that my server is fully functional.

Hopefully someone has some ideas :)

Thanks,
Christian
 
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cPanelMichael

Administrator
Staff member
Apr 11, 2011
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I see that only a couple servers can seem to trace the nameserver to the server IP
Hello :)

Could you elaborate further on this? For instance, what error messages do you notice on a website such as IntoDNS? Do you notice any consistent error messages related to "Named" in /var/log/messages?

Thank you.
 

Drumrocker365

Well-Known Member
Apr 15, 2014
72
1
8
cPanel Access Level
Root Administrator
Hello :)

Could you elaborate further on this? For instance, what error messages do you notice on a website such as IntoDNS? Do you notice any consistent error messages related to "Named" in /var/log/messages?

Thank you.
Hi,

I don't notice anything weird in the messages log. IntoDNS shows NS mismatch and also points to IPs that are way old and no longer valid.. Not sure why this is happening, as I know I updated the IPs everywhere to the new one.
 

Drumrocker365

Well-Known Member
Apr 15, 2014
72
1
8
cPanel Access Level
Root Administrator
into dns pulls the live info so sounds like you missed an ip (at your registrar perhaps ??)
50% sounds like at least 1 NS is not working
I did some more research and it looks like one domain resolves better than another.. One domain I have shows the correct IP on the nameservers, yet this other domain shows old IPs. I am sure I got the correct IPs on my registrar.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,904
2,237
463
Feel free to update us with the outcome after the additional investigation on the actual domain name. You may need to contact your registrar if the information you are entering is not properly reflected.

Thank you.