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Survey of Internet Performance Measurement Platforms

Posted May 21, 2015 - permalink

Vaibhav Bajpai of the Computer Networks and Distributed Systems (CNDS) Lab at Jacobs University Bremen in Germany prepared a survey of performance measurement platforms and standardization efforts.  The article's abstract is as follows:

A number of Internet measurement platforms have emerged in the last few years. These platforms have deployed thousands of probes at strategic locations within access and backbone networks and behind residential gateways. In this paper we provide a taxonomy of these measurement platforms on the basis of their deployment use-case. We describe these platforms in detail by exploring their coverage, scale, lifetime, deployed metrics and measurement tools, architecture and overall research impact. We conclude the survey by describing current standardization efforts to make large-scale performance measurement platforms interoperable.

This work can be found using the following links:

IEEE Library:
Mirrored Copy:

SSL Logjam Vulnerability

Posted May 20, 2015 - permalink

A new SSL vulnerability was announced on May 20th 2015, dubbed Logjam: perfSONAR hosts of 3.4 lineage should NOT be vulnerable to this attack. The Apache configuration installed by the Toolkit disables the cipher suites in question by default. See the resource above for more details. There are no further actions required. 

Interested parties may visit to check a host (perfSONAR or otherwise) if there is worry that a machine may be vulnerable.

NDT Now Available

Posted May 20, 2015 - permalink

We would like to announce the availability of NDT version This is a minor new release, that contains, among other things:

  • Log rotation could cause NDT to startup even if it’d been disabled
  • Changes the default gauge value to 1000, and swaps the speed units as appropriate
  • Fixes an issue where IE users were getting “plugin not loaded” for the Java backend in certain environments

A source tarball is available at

You can find RPMs at the Internet2 RPM repository at . Existing users that have auto-updates configured should download the changes in the next 24 hours. Those without auto-updates can run 'yum update' by hand to get the latest version. To use Apache instead of fakewww, install the package ‘ndt-server-apache’ using yum, and run “service ndt restart” and “service httpd restart”.

If you have any questions or concerns, please direct them to

Updated perfSONAR Deployment Graphs

Posted May 4, 2015 - permalink

There are over 1400 instances of perfSONAR publicly available, see the deployment page for more details.