said by Skyway:It could be a denial of service attack...
If it is? Hughes would need to change your IP address to stop it...
I would only suggest this as a possible solution if the trafiic continues while you do not have a computer or router connected to your modem...
I seem to recall that someone else, several weeks ago, was seeing the same thing, and, in fact, it did turn out to be a denial of service attack.
I'd suggest sending an IM to the Hughes representative who frequents this forum. I believe that he ended up helping the other person a few weeks ago. The Hughes rep uses the name Hughesnet.