Category: Uncategorized

Moving CentOS 8 builds to Oracle Linux 8

As you might be aware, CentOS 8 has reached End of Life on December 31st 2021. Furthermore, yesterday, CentOS 8 actually disappeared from the distribution mirrors. While we had made plans for this, we failed to execute those plans until now. This means we will need to switch build environments on some of our supported branches (Recursor and Authoritative 4.4/4.5/4.6, and dnsdist 1.5/1.6/1.7) mid release cycle. We are making those changes this week.

In mid-2021, we did extensive testing of building and running on the various CentOS alternatives, and came to one very clear conclusion – while the resulting binaries were not always bit for bit identical, the differences were uninteresting. Because of this, we believe users will not notice this change in our build environment at all and can continue to run our packages on their RHEL-derivative of choice.

However, just in case incompatible changes pop up, we are not switching the 7 build environment at this time.

Authoritative Server 4.6.0

Hello!

after a very useful beta/RC period in which we received some excellent bug reports, we released Authoritative Server version 4.6.0 today.

Version 4.6.0 mostly brings small improvements and fixes, but there are three notable new features:

  • support for incoming PROXY headers
  • support for EDNS cookies
  • autoprimary management via pdnsutil and the API

Support for PROXY headers allows you to put a load balancer (such as dnsdist) in front of the Authoritative Server, while still having the Auth see the actual IPs of clients talking to it.

EDNS Cookies allow resolvers that support it to have an extra layer of authentication on their communication with the Authoritative Server.

Compared to 4.6.0-alpha1, the major user visible change is the new NSEC3PARAM settings – check the upgrade docs below for more information. Besides that, various bugs have been fixed.

A full list of changes can be found in the changelog.

Please make sure to read the Upgrade Notes before upgrading.

The tarball (signature) is available at downloads.powerdns.com. Packages for various distributions are available from repo.powerdns.com.

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

PowerDNS Authoritative Server 4.5.3

Hello!

Today we published release 4.5.3 of the Authoritative Server. It contains several robustness fixes for the LMDB backend, and for the zone cache.

Please find a full list in the changelog.

Please make sure to read the Upgrade Notes before upgrading.

The tarball (signature) is available at downloads.powerdns.com and packages for various Linux distributions are available from repo.powerdns.com.

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

First Release Candidate for Authoritative Server 4.6.0

Hello!

Today we released the first Release Candidate for Authoritative Server version 4.6.0.

Version 4.6.0 mostly brings small improvements and fixes, but there are three notable new features:

  • support for incoming PROXY headers
  • support for EDNS cookies
  • autoprimary management via pdnsutil and the API

Support for PROXY headers allows you to put a load balancer (such as dnsdist) in front of the Authoritative Server, while still having the Auth see the actual IPs of clients talking to it.

EDNS Cookies allow resolvers that support it to have an extra layer of authentication on their communication with the Authoritative Server.

Compared to 4.6.0-alpha1, the major user visible change is the new NSEC3PARAM settings – check the upgrade docs below for more information. Besides that, various bugs have been fixed.

A full list of changes can be found in the changelog.

Please make sure to read the Upgrade Notes before upgrading.

The tarball (signature) is available at downloads.powerdns.com. Packages for various distributions are available from repo.powerdns.com.

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

PowerDNS Recursor 4.6.0 Released

We are proud to announce the release of PowerDNS Recursor 4.6.0.

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

  • The ability to flush records from the caches on a incoming notify requests. Many thanks to Kevin P. Fleming for this feature!
  • A rewrite of the outgoing TCP code, adding both re-use of connections and support for DoT to authoritative servers or forwarders.
  • Many improvements in the area of metrics: more metrics are collected and more metrics are now exported in a Prometheus friendly way.
  • A new Zone to Cache function that will retrieve a zone (using AXFR, HTTP, HTTPS or a local file) periodically and insert the contents into the record cache, allowing the cache to be always hot for a zone. This can be used for the root or any other zone.
  • An experimental Event Tracing function, providing insight into the time taken by the steps in the process of resolving a name.

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.

By default, if a forwarder is specified using port 853, DoT will be used to connect to that forwarder. It is also possible to list 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 for additional details. When upgrading do not forget to check the upgrade guide.

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

The tarball (signature) is available from our download server and packages for several distributions are available from our repository.

With this 4.6.0 release, the 4.3.x releases will be marked EOL and the 4.4.x and 4.5.x releases will go into critical fixes only mode. Consult the EOL policy 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 most 32-bit Linux platforms.

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.

PowerDNS and Log4J/Log4Shell

As you may have heard, a critical vulnerability in the Log4J library was published recently. We have received questions about our software’s vulnerability to these exploits.

None of our open source products use Java:

  • PowerDNS Authoritative Server
  • PowerDNS Recursor
  • dnsdist
  • metronome

Also, none of the commercial PowerDNS products use Java. If you are a customer and you have concerns, please contact us.

However, we do know that some of our users output various data streams (logs, dnstap, our own Protobuf logging, etc.) from our software. Those streams may end up in 3rd-party products like Elasticsearch, which is vulnerable (Elastic advisory on Log4J).

So, to judge if you, as a PowerDNS user, are affected by the Log4J vulnerability, please take into account what you do with your DNS data!

First Beta Release for Authoritative Server 4.6.0

Hello!

Today we released the first Beta version for Authoritative Server version 4.6.0.

Version 4.6.0 mostly brings small improvements and fixes, but there are two notable new features:

  • support for incoming PROXY headers
  • support for EDNS cookies

Support for PROXY headers allows you to put a load balancer (such as dnsdist) in front of the Authoritative Server, while still having the Auth see the actual IPs of clients talking to it.

EDNS Cookies allow resolvers that support it to have an extra layer of authentication on their communication with the Authoritative Server.

Compared to 4.6.0-alpha1, the major user visible change is the new NSEC3PARAM settings – check the upgrade docs below for more information. Besides that, various bugs have been fixed.

A full list of changes can be found in the changelog.

Please make sure to read the Upgrade Notes before upgrading.

The tarball (signature) is available at downloads.powerdns.com. Packages for various distributions are available from repo.powerdns.com.

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

First release candidate of PowerDNS Recursor 4.6.0

We are proud to announce the first release candidate of PowerDNS Recursor 4.6.0.

Compared to the beta2 release, this release fixes an issue with incoming queries over TCP and with the systemd unit file for virtual hosting.

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

  • The ability to flush records from the caches on a incoming notify requests. Many thanks to Kevin P. Fleming for this feature!
  • A rewrite of the outgoing TCP code, adding both re-use of connections and support for DoT to authoritative servers or forwarders.
  • Many improvements in the area of metrics: more metrics are collected and more metrics are now exported in a Prometheus friendly way.
  • A new Zone to Cache function that will retrieve a zone (using AXFR, HTTP, HTTPS or a local file) periodically and insert the contents into the record cache, allowing the cache to be always hot for a zone. This can be used for the root or any other zone.
  • An experimental Event Tracing function, providing insight into the time taken by the steps in the process of resolving a name.

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.

By default, if a forwarder is specified using port 853, DoT will be used to connect to that forwarder. It is also possible to list 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 for additional details. When upgrading do not forget to check the upgrade guide.

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

The tarball (signature) is available from our download server and packages for several distributions are available from our repository.

With the final 4.6 release, the 4.3.x releases will be marked EOL and the 4.4.x and 4.5.x releases will go into critical fixes only mode. Consult the EOL policy 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 most 32-bit Linux platforms.

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.

PowerDNS Authoritative Server 4.4.2

Hello!

We are proud to announce version 4.4.2 of the Authoritative Server. This releases fixes one issue:

  • RFC2136/nsupdate: apply new TTL to whole RRset, not only to the added record

Please find a full list in the changelog.

Please make sure to read the Upgrade Notes before upgrading.

The tarball (signature) is available at downloads.powerdns.com and packages for various Linux distributions are available from repo.powerdns.com.

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

Second beta release of PowerDNS Recursor 4.6.0

We are proud to announce the second beta release of PowerDNS Recursor 4.6.0.

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

  • The ability to flush records from the caches on a incoming notify requests. Many thanks to Kevin P. Fleming for this feature!
  • A rewrite of the outgoing TCP code, adding both re-use of connections and support for DoT to authoritative servers or forwarders.
  • Many improvements in the area of metrics: more metrics are collected and more metrics are now exported in a Prometheus friendly way.
  • A new Zone to Cache function that will retrieve a zone (using AXFR, HTTP, HTTPS or a local file) periodically and insert the contents into the record cache, allowing the cache to be always hot for a zone. This can be used for the root or any other zone.
  • An experimental Event Tracing function, providing insight into the time taken by the steps in the process of resolving a name.

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.

By default, if a forwarder is specified using port 853, DoT will be used to connect to that forwarder. It is also possible to list 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 for additional details. When upgrading do not forget to check the upgrade guide.

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

The tarball (signature) is available from our download server and packages for several distributions are available from our repository.

With the final 4.6 release, the 4.3.x releases will be marked EOL and the 4.4.x and 4.5.x releases will go into critical fixes only mode. Consult the EOL policy 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 most 32-bit Linux platforms.

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.