I conduct a weekly live-stream using Google Hangouts that streams over YouTube. Recently, the stream has been attacked by DDoSers. In an attempt to thwart such attacks, I have tried to keep my IP address secret [by not running Skype] and have even tried entry-level firewalls.
Are there any firewalls that would work well to protect a livestream? Are there any other security measures I could take? Ideally, the total solution would cost no more than $2500.
How effective do you think these countermeasures would be against determined DDoSers?