Well, I really shouldn't be telling you this . . .
You'll have to engage the special super secret IP cloaking bit. To do this you'll first need to make sure your ethernet cable has a 12 micron coating of unobtanium (not the standard 9.8, mind you). Next you'll have to bypass the fetzer valve in the third jefferies tube (it'll be obvious which one it is, it's labeled "GNDN"). After you do that you'll have reversed the polarity of the neutron flow and your IP address will be completely hidden (well, except for a small ion trail, but they'd have to have installed the stellar survey patch to ethereal to detect that).