[Pdns-announce] PowerDNS DNSdist 2.0.6 Released

[Remi Gacogne]

Hi,

Today we released DNSdist 2.0.6, fixing several issues. The notable ones 
are:
- the feature that was introduced in 2.0.0 to limit the rate of new TCP 
or QUIC connections that a given client can open per second has a 
serious bug, coming from a confusion over the interval, which is set in 
minutes, and the rate, which is set in seconds, causing clients to be 
blocked a lot sooner than they should have been
- there was a data race in the CDB Key-Value store implementation. This 
was fixed by preventing threads from accessing the same CDB object 
concurrently, which might have a performance impact for users that rely 
heavily on CDB. Please reach out to us if you experience such a 
performance impact
- the BPFFilter::addRangeRule feature was not working properly
- configured buffer sizes for UDP sockets were only applied to incoming 
sockets, not outgoing ones
- AF_XDP/XSK could not be enabled from YAML
- the TLS session cache for outgoing connections to backends was not 
properly cleaned up
- the computation of the "Top N" metrics for suffix-based dynamic block 
counters was wrong
- DownstreamState::setHealthCheckParams was sometimes overwriting the 
wrong value
- a memory leak was found in the SNMP metrics implementation
- the maximum size of a DNS over QUIC query was slightly off, which 
might have been a problem for very large queries


Please see the DNSdist website [1] for the more complete changelog [2] 
and the current documentation. The upgrade guide is also available there 
[3].

Please send us all feedback and issues you might have via the mailing 
list, or in case of a bug, via GitHub [4].

The release tarball [5] and its signature [6] are available on the 
downloads website, and packages for several distributions are available 
from our repository [7].

[1]: https://dnsdist.org
[2]: https://dnsdist.org/changelog.html#change-2.0.6
[3]: https://dnsdist.org/upgrade_guide.html
[4]: https://github.com/PowerDNS/pdns/issues/new/choose
[5]: https://downloads.powerdns.com/releases/dnsdist-2.0.6.tar.xz
[6]: https://downloads.powerdns.com/releases/dnsdist-2.0.6.tar.xz.sig
[7]: https://repo.powerdns.com

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