I did the netalyzr test which checks some ports and network configs.

The result was strange. It contained a problem with DNSSEC:

Only some DNS root server instances returned proper DNSSEC information. The working roots are: A, B, C, E, F, G, H, I, J, K, L, M

Do i need to worry because apparently the DNS Server from my ISP is unable to obtain information from all DNS root servers or can i ignore this warning?


So, all but one worked, right? I bet d.root-servers.net just had a glitch at the time you tested. Try again.

If it still doesn't work, see if you can reach it with a non-DNSSEC DNS query.

If that doesn't work, then maybe your ISP has a broken route to the University of Maryland, who host the D server. Try hitting other resources at the university.

  • So there are only A-M dns root server? I was afraid that i was missing N-Z too. I will check again tomorrow, thanks – Wandang Apr 18 '14 at 0:41
  • you were right, today it works like a charm. – Wandang Apr 18 '14 at 14:26
  • There are no N-Z root nameserver names at this time, only A-M. But it's more complicated than that in reality. Most reference an anycast address with a cluster of DNS servers behind them. – milli Apr 21 '14 at 21:30

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