DNS works after reboot but then “Can’t reach nameserver” (AWS Lightsail)

Community Support DNS
1

Hello everyone,I’m running HestiaCP on an AWS Lightsail Ubuntu server and I’m having a DNS issue.When I reboot or stop/start the instance, everything works fine at first and my domain loads correctly. But after a few minutes, the website stops working.When I check on DNS checker tools, it shows “Can’t reach nameserver.”

NS1 and NS2 were working before, and port 53/UDP is open in the AWS firewall.Has anyone experienced this before? Why would the nameserver work after reboot and then become unreachable after a few minutes?

Thanks for your help.

2

Could you please share more informations about your setup? If you run own nameserver, you need at least two different servers.

If it works after reboot, have a look at the bind9/named service to verify, that all is running properly.

3

Hello,Yes, I am using two different nameservers on two different servers:

  • ns1 → 18.133.4.76

  • ns2 → 3.9.102.191

Both servers have bind9 (named) installed and running.When I stop and start the instance for ns1, I am able to access it again via my domain, but after a few minutes the issue returns and DNS checker shows “Can’t reach nameserver.”

I have attached a screenshot of my DNS records for reference.

IMG_6159
IMG_61591084×396 16.1 KB

4

check the bind/named logs, probaly something fails there.

5

Is it for the ns2 or ns1?

6

both, check the logs :slight_smile: