Are we talking about a US Government Network, or just a [commercial] network in the US? Their is a distinct difference. Plus, I'm sure there are far more official channels you should be going through if you're within the Government.
Your username made me laugh a little bit though, but I'd hardly describe this as "under attack". I'll see if I can pull Milos or someone similar (HonzaZ is the only other fellow I know) to hop in and check up with you.