[dnsdist] First alpha release of dnsdist 1.7.0

[Remi Gacogne]

Hi everyone,

We are proud to announce the first alpha release of dnsdist 1.7.0. This 
release contains several new exciting features, as well as improvements 
and bug fixes.

In our view, the most exciting new feature is the support of outgoing 
DNS over TLS and DNS over HTTPS, as well as the ability to do 
"cross-protocol" queries, meaning a query received over a given protocol 
(UDP, TCP, DoT, DoH, ...) can be forwarded over a different one. Now 
that dnsdist is capable of contacting its backend over an encrypted 
channel, full end-to-end encryption is possible, offering improved 
confidentiality and integrity.

This release also reduces the memory footprint of dnsdist in several 
places, which makes it easier to use in resource-constrained environments.

We added support for generating the still experimental SVCB and HTTPS 
records directly from dnsdist, offering potential benefits to both 
performance and privacy.

Our LMDB code has gained the ability to do range-based lookups, and is 
now more efficient even for simple lookups.

Extending the per-thread custom load-balancing policies introduced in 
1.6.0, it is now possible to write blazing-fast, lock-less per-thread 
custom actions using the Lua foreign function interface.

Dimitrios Mavrommatis improved the handling of AXFR and IXFR queries, 
making it possible to reuse a TCP connection used for a zone transfer 
much more efficiently.

Holger Hoffstätte also improved the reporting of an unavailable backend, 
making sure the existing metrics are no longer reported to prevent any 
confusion.

Please see the dnsdist website [1] for the more complete changelog [2] 
and the current documentation.

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

Release tarballs are available on the downloads website, and packages 
for CentOS 7 and 8, Debian Buster, Bullseye, and Ubuntu Bionic and Focal 
are available from our repository.

With the future 1.7.0 final release, the 1.4.x releases will be EOL and 
the 1.5.x releases will go into critical security fixes only mode.

Finally, we would like to thank the PowerDNS community and all external 
contributors for their great work in this release!

[1]: https://dnsdist.org
[2]: https://dnsdist.org/changelog.html#change-1.7.0-alpha1
[3]: https://github.com/PowerDNS/pdns/issues/new/choose
[4]:
https://downloads.powerdns.com/releases/dnsdist-1.7.0-alpha1.tar.bz2
[5]:
hhttps://downloads.powerdns.com/releases/dnsdist-1.7.0-alpha1.tar.bz2.sig
[6]: https://repo.powerdns.com

Best regards,
-- 
Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/
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