You may be able to do this using IP address groups in reports
An alternative method would be to use something like LANGuardian to focus in on the Internet activity and integrate it with SolarWinds
Hope this helps,
You could enable netflow on the internet router interface and use solar winds to collect the netflow data. You can then see all conversations going in and out of the internet.
We already have it enabled. I just need to generate a report to give to our security team. I can't figure out how to edit the existing reports to only show me internet traffic.