DNS hoster works strange or does not work, how to check?

Question

Hoster together with the server provides its own DNS servers. On the physical server with the host's DNS the resolver works, but when I install the KVM / QEMU virtual server with the same DNS host - the ping passes, and the addresses of the sites do not resolved.

When I just change to public Google 8.8.8.8 - everything works as expected. I change back to the DNS host, reboot - the ping is on, there is no resolve. How can I check the problem?

Hoster online net - DNS 62.210.16.(6/7)

#mtr google.com
Failed to resolve host: Temporary failure in name resolution

# traceroute google.com
google.com: Temporary failure in name resolution
Cannot handle "host" cmdline arg `google.com' on position 1 (argc 1)


# mtr 62.210.16.6 --report
Start: Mon Jul 30 21:19:38 2018
HOST: hp1                         Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 163.172.216.1              0.0%    10    0.6   0.6   0.5   0.8   0.0
  2.|-- 195.154.2.128              0.0%    10    0.4   0.6   0.4   0.7   0.0
  3.|-- 195.154.2.108              0.0%    10    1.0   1.0   0.9   1.2   0.0
  4.|-- 195.154.2.124              0.0%    10    0.7   0.7   0.7   0.8   0.0
  5.|-- 195.154.1.224              0.0%    10    0.7   0.6   0.6   0.7   0.0
  6.|-- 62.210.16.6                0.0%    10    0.3   0.4   0.3   0.4   0.0

With the dns hoster the traceroute 8.8.8.8 works, but for very long - 2-3 minutes.

# traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
 1  163.172.216.1 (163.172.216.1)  0.607 ms  0.955 ms  0.894 ms
 2  195.154.2.128 (195.154.2.128)  0.545 ms  0.487 ms 195.154.2.126 (195.154.2.126)  0.458 ms
 3  195.154.2.106 (195.154.2.106)  0.579 ms  0.770 ms  0.640 ms
 4  80.249.208.247 (80.249.208.247)  13.231 ms  13.352 ms  13.493 ms
 5  108.170.241.193 (108.170.241.193)  13.271 ms  13.367 ms  13.306 ms
 6  108.170.234.19 (108.170.234.19)  14.028 ms 216.239.50.197 (216.239.50.197)  14.305 ms 108.170.236.147 (108.170.236.147)  12.830 ms
 7  8.8.8.8 (8.8.8.8)  10.722 ms  10.799 ms  10.528 ms

DNS config in /etc/resolvconf/resolv.conf.d/base – ebyratu Jul 31 '18 at 09:37 — ebyratu, Jul 31 '18 at 09:37
May I know which OS you are using ? – Chaminda Bandara Sep 23 '21 at 18:23 — Chaminda Bandara, Sep 23 '21 at 18:23

score 0 · Answer 1 · answered Dec 28 '18 at 15:40

First what is your hoster DNS address ( cat /etc/resolv.conf) ?

I think you need to check whether your hoster DNS provide reverse resolving try to do next steps:

dig example.com @YOUR_HOSTER(IP or DNS name)
if it return Blank or something wrong it seems that your hoster doesn't provide public reverse DNS lookup like google's 8.8.8.8 does.

DNS hoster works strange or does not work, how to check?

1 Answers1