[Pdns-announce] First Alpha release of PowerDNS Recursor 4.6.0

Otto Moerbeek otto.moerbeek at open-xchange.com
Wed Sep 29 09:10:12 UTC 2021

   We are proud to announce the first alpha release of PowerDNS Recursor

   Compared to the previous major (4.5) release of PowerDNS Recursor, this
   release contains two major sets of changes:

     * a rewrite of the outgoing TCP code, adding both re-use of
       connections and support for DoT to authoritative servers or
     * many improvements in the area of metrics: more metrics are
       collected and more metrics are now exported in a Prometheus
       friendly way.

   Re-use of TCP/DoT connections is achieved by not closing connections,
   leaving them open for re-use. Previously, a TCP connection would be
   closed after a single query-reply exchange. The policy used to keep
   idle connections open is governed by various settings[1].

   By default[2], if a forwarder is specified using port 853, DoT will be
   used to connect to that forwarder. It is also possible to list[3]
   specific nameservers that should be contacted over DoT. Note that no
   certificate validation is done. After the standard committees define
   discovery of authoritative servers offering DoT, we will add
   functionality to allow automatic switching to DoT including validation
   of certificates.

   As always, there are also many smaller bug fixes and improvements,
   please refer to the changelog[4] for additional details.

   Please send us all feedback and issues you might have via the mailing
   list[5], or in case of a bug, via GitHub[6].

   The tarball[7] (signature[8]) is available from our download server[9]
   and packages for several distributions are available from our

   With the final 4.6 release, the 4.3.x releases will be EOL and the
   4.4.x and 4.5.x releases will go into critical fixes only mode. Consult
   the EOL policy[11] for more details.

   We would also like to mention that with the 4.5 release we stopped
   supporting systems using 32-bit time. This includes 32-bit Linux
   platforms like arm6, arm7, and i386.

   We are grateful to the PowerDNS community for the reporting of bugs,
   issues, feature requests, and especially to the submitters of fixes and
   implementations of features.


   1. https://docs.powerdns.com/recursor/settings.html#tcp-out-max-idle-ms
   2. https://docs.powerdns.com/recursor/settings.html#dot-to-port-853
   3. https://docs.powerdns.com/recursor/settings.html#dot-to-auth-names
   4. https://doc.powerdns.com/recursor/changelog/4.6.html#change-4.6.0-alpha1
   5. https://mailman.powerdns.com/mailman/listinfo/pdns-users
   6. https://github.com/PowerDNS/pdns/issues/new/choose
   7. https://downloads.powerdns.com/releases/pdns-recursor-4.6.0-alpha1.tar.bz2
   8. https://downloads.powerdns.com/releases/pdns-recursor-4.6.0-alpha1.tar.bz2.sig
   9. https://downloads.powerdns.com/releases/
  10. https://repo.powerdns.com/
  11. https://docs.powerdns.com/recursor/appendices/EOL.html


kind regards,
Otto Moerbeek
PowerDNS Developer

Email: otto.moerbeek at open-xchange.com

Open-Xchange AG, Hohenzollernring 72, 50672 Cologne, District Court Cologne HRB 95366
Managing Board: Andreas Gauger, Carsten Dirks, Dirk Valbert, Frank Hoberg, Stephan Martin
Chairman of the Board: Richard Seibt

PowerDNS.COM BV, Koninginnegracht 14L, 2514 AA Den Haag, The Netherlands
Managing Director: Robert Brandt, Carsten Dirks
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