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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-25922

dns randomcase requests causing bypass dns cache

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    • Icon: Incident report Incident report
    • Resolution: Duplicate
    • Icon: Trivial Trivial
    • None
    • 7.0.8
    • Proxy (P)
    • None
    • Debian 12 / Zabbix-Proxy 7.08

      Steps to reproduce:

      1. Configure host with an interface using FQDN instead of IP
      2. Observe dns queries with tcpdump/wireshark

      We are wondering why our zabbix-proxy generates over 1000 dns requests per second. On the server we run dns caching daemon, but the zabbix-proxy sends requests with random cased names. For example: when you configure the host with the interface hostname.subdomain.tld, you will see many requests (A/AAAA) for  HOStNamE.sUbDOMAiN.Tld, HosTName.SUBdOmAIn.tLd, HOStname.sUbdoMAiN.TLd, etc.... For the caching daemon it looks different and all requests are send to our resolver. Is there a way to change this behavior? 

            Unassigned Unassigned
            vladimir2022 Vladimir Holzmann
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              Created:
              Updated:
              Resolved: