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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Things to do to make the network better
> I will also point out that many of the recent "smurf" attacks and > similar problems people are having on the net would be gone if people > would just carefully filter internal/external addresses on their > border machines, that is, prevent packets claiming to be from "inside" > networks from coming in from the "outside", and prevent packets > claiming to be from "outside" networks from going out from the > "inside". The latter will stop your network from *ever* being the > source of a wide variety of packet forgery attacks, and is necessary > to being a good network citizen. The former will stop your network > from being the subject of a wide variety fo packet forgery attacks, > and is necessary to make your customers even remotely safe on the net. That's great if you're a downstream provider with no transit customers. However, when you become a transit provider, it becomes much more difficult to determine inside vs. outside, since you're more in the middle between two "outsides" that pass traffic through you. Owen
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