Release Notes for NorduGrid ARC 6.14

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December 2, 2021

We are happy to announce the release of ARC 6.14.0.

Highlights in this release

To increase the web interface security level, one can now configure TLS protocols and ciphers in arc.conf. The default values are in addition improved to strengthen security.

The new configuration options can be found in the [arex/ws] block. The options together with defaults (which will be used when not explicitly included in arc.conf) are:

tlsprotocols=TLSv1.2 TLSv1.3

Please check the documentation for more details.

Note that in ARC 7, the default values of the TLS settings will be tightened further.

Another highlight is an improvement of the process control which has been tested and reported to improve job processing and transfers considerably, especially noticeable at high load.

Finally, as usual, the release contains a handful of smaller bug fixes and other improvements.

The following Bugzilla tickets have been adressed or solved


The ARC 6 documentation can be found at this location.

If you miss something or have questions, please contact us!

Installing ARC 6

We recommend to install ARC release using the Nordugrid repository.

Note that if you instead install from EPEL for RHEL7 compatible systems, the ARC 6 packages can be found as nordugrid-arc6-* and not nordugrid-arc-*. This was needed in order to supply both ARC 5 already available for RHEL7 and the new ARC 6.

We provide binary builds for all supported versions of:

In addition we build nightly packages for some older platforms.


You can submit pull requests to our public repo which mirrors our GitLab repo.

The pull requests will be automatically copied over to our Gitlab repo where they will be merged into the source-code if accepted.

Getting in touch

If you need help with the configuration file or have any other questions related to ARC 6, please contact us via

Support of ARC 5-series

ARC 5 is no longer supported.

To install ARC 6 from EPEL7 the package-names are of type: nordugrid-arc6-*

Known issues

Previous releases

Details of previous releases can be found at the ARC Releases page

NorduGrid homepage