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- From: Brad Knowles
- Date: Sun Aug 18 15:08:51 2002
At 11:36 PM +0200 2002/08/17, Brad Knowles wrote:
Of course, it now occurs to me that there are plenty of providers
which may not own the entire /16 that they are in, and therefore they
could also get hurt by abuse being generated by near-by networks.
Unfortunately, I'm not sure that there's too much you can do about
this, because the consequences could be extremely severe.
a very logical
algorithm would be ``n source ip adresses per /16 per minute'' which
would catch at least the badly distributed DDoS attacks and does not
impose large processing overhead in cycles and memory, i think.
Assuming you're talking about the transmitting relay (which would
be difficult to fake), this would be some additional protection.
OTOH, this doesn't really have anything particular to do with the
service you'd be providing, and would not be any additional risk that
you would not already be experiencing.
Unless someone is trying to DoS your machine. Heck, they could
just generate zillions of SYN packets with random source IP
addresses, and that could cause you some significant problems.
Brad Knowles, <firstname.lastname@example.org>
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-Benjamin Franklin, Historical Review of Pennsylvania.
GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E W+++(--) N+ !w---
O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++)
tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++)