perfSONAR nodes behind a NAT (AWS nodes)

perfSONAR testpoints behind a NAT experience throughput test failures when the iperf3 server portion binds to the incorrect interface advertised via DNS. In order to fix this in a NAT situation (such as an AWS deployment) is to add the correct interface address to the FQDN in the /etc/hosts file.

1. Determine the correct interface with ip a

2. Add FQDN and interface IP to /etc/hosts