---
title: PowerDNS DNSdist 2.0.6 Released
description: PowerDNS DNSdist 2.0.6 Released.
---

[PowerDNS Blog ](https://blog.powerdns.com)

# [PowerDNS DNSdist 2.0.6 Released](https://blog.powerdns.com/2026/05/21/powerdns-dnsdist-2.0.6-released)

 Written by [Remi Gacogne](https://blog.powerdns.com/author/rgacogne) | May 21, 2026 11:41:22 AM

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](https://dnsdist.org/) for the more complete [changelog](https://www.dnsdist.org/changelog.html#change-2.0.6) and the current documentation. The [upgrade guide](https://dnsdist.org/upgrade_guide.html) is also available there.

Please send us all feedback and issues you might have via the [mailing list](https://mailman.powerdns.com/mailman/listinfo/dnsdist), or in case of a bug, via [GitHub](https://github.com/PowerDNS/pdns/issues/new/choose).

The release [tarball](https://downloads.powerdns.com/releases/dnsdist-2.0.6.tar.xz) and its [signature](https://downloads.powerdns.com/releases/dnsdist-2.0.6.tar.xz.sig) are available on the downloads website, and packages for several distributions are available from our [repository](https://repo.powerdns.com/).

[View full post](https://blog.powerdns.com/2026/05/21/powerdns-dnsdist-2.0.6-released)

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