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Means that the server isn't able to answer the query for some reason.

  1. If the queried server is a caching server, it may result from all the delegated servers not giving any response
  2. If the queried server is the authoritative server, it may be because the zone file for that name isn't loaded.
  3. If you
    1. create a domain name out of a zone that you don't own (.dz)
    2. the zone is signed
    3. your domain name is not signed

… then you will have an error in the logs that looks like this :

    
    06-Oct-2019 11:56:38.686 dnssec: info:   validating @0x7f77ac09df40: eprs.dz SOA: got insecure response; parent indicates it should be secure

… either use another zone (tld), or disable dnssec validation (rndc validation off)

To troubleshoot SERVFAIL

Turn on debug mode then see the logs.

rndc trace

When you're done, turn debug mode off with

rndc notrace

contact : @ychaouche yacinechaouche at yahoocom


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