perfSONAR User Q&A and Other Discussion

[Jason Zurawski <>]

All;

The latest release of the pS Performance Toolkit featured some of the steps 
recommended in the NTAC Performance Working Group's Firewall document, found 
here:

  http://psps.perfsonar.net/toolkit/firewalls.html

After some time testing around the community, we found a weakness that needs 
to be corrected.  We had originally targeted 200 ports to be made available 
for OWAMP testing, and configured the daemon to use the ones recommended.  We 
have found that some sites are testing to a large number of sites, as well as 
being tested to by a large number of external parties, and are quickly 
exhausting the 200 available ports.  To combat this we updated the 
recommendation to be much larger (1200 ports) in the online documentation 
found above, and in the FAQ:

  http://psps.perfsonar.net/toolkit/FAQs.html#Q6

We will also be making an update to the OWAMPD RPM in the coming weeks that 
will fix this issue.  For now if anyone sees that owamp tests are failing you 
can make a manual change to /etc/owampd/owamd.conf and alter the 'testports' 
variable.  We apologize for any inconvenience this may cause.  

Thanks, and let us know if there are any questions;

-jason