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Simple Lookup Service 2.1-2 released

Posted June 10, 2016 - permalink

A new rpm is available for Simple Lookup Service.  This new release fixes an issue that caused renewals to get deleted even if they were renewed on time by the toolkit hosts. 

If you have the I2 repository configured, then running "yum update" will install the new rpm. To do a fresh install, the rpm can be downloaded here:

Instructions for installation can be found here:

Please remember to restart the service after installing/updating lookup-service.

iperf-3.1.3 is Available

Posted June 8, 2016 - permalink

ESnet (Energy Sciences Network) announces iperf-3.1.3, the latest point/bugfix release from the iperf 3.1 codeline.

iperf-3.1.3 fixes an important security issue in all previous versions of iperf3.  That issue was a buffer overflow / heap corruption issue that could occur if a malformed JSON string was passed on the control channel.  In theory, it could be leveraged to create a heap exploit. This vulnerability was discovered and reported by Dave McDaniel, Cisco Talos.  More information can be found in security advisories TALOS-CAN-0164 and ESNET-SECADV-2016-0001.  The CVE identifier CVE-2016-4303 has been assigned for this vulnerability.

This release of iperf3 also supports the use of fair-queueing-based per-socket pacing (in recent versions of the Linux kernel).  Several other bugs and portability fixes are also included.

More information on changes can be found in the RELEASE_NOTES file in the source distribution.

iperf3 is a tool for measuring the maximum TCP and UDP performance along a path, allowing for the tuning of various parameters and reporting measurements such as throughput, jitter, and datagram packet loss.  It is fully supported on Linux, FreeBSD, and MacOS X.  It may run on other platforms as well, although it has not received the same attention and testing.  Note that iperf3 is not compatible with, and will not interoperate with, version 2 or earlier of iperf.

The source code for iperf 3.1.3 is available at:

SHA256 hash:

60d8db69b1d74a64d78566c2317c373a85fef691b8d277737ee5d29f448595bf  iperf-3.1.3.tar.gz

iperf3 is freely-redistributable under a 3-clause BSD license.  More information can be found in the LICENSE file inside the source distribution.

Additional documentation for iperf3 can be found at:

More information about iperf3 (including the issue tracker, source code repository access, and mailing list) can be found on the iperf3 page on GitHub at:

The mailing list for iperf3 development is:

To see the list archives or join the mailing list, visit:

RedHat CVE and New Web100 Kernel

Posted June 2, 2016 - permalink

New RPMs for the Web100 Kernel are available in the repositories. You may run 'yum update' to grab the new kernel. You should restart your host after the upgrade completes. This addresses the followng CVE:

TNC 2016 BoF: perfSONAR on Low-Cost Hardware

Posted May 17, 2016 - permalink

perfSONAR is a well-known monitoring and measurement tool in the global community that enables seamless troubleshooting over multiple domains. For about a year now, different perfSONAR teams have experimented, with good results, on running perfSONAR on small and inexpensive devices. The goal of this session is to give an update on the perfSONAR project, and introduce perfSONAR on low cost hardware.
This also has a wider scope of bringing this subject and its benefits to the European R&E and networking community, following on the success in the global perfSONAR user base. TNC is well-attended by members of not only the GÉANT community, but also members of wider R&E community, and commercial participants as well, making it an ideal showcase for this project. There will also be an opportunity to use and experiment with some of the small nodes by attendees themselves.

Intended audience: network engineers, network managers, service managers, basically anybody interested in monitoring and troubleshooting their networks - whether representing NRENs, or end-users like network team from a university etc.