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List: nanog
Subject: Re: Smurfing
From: "Kelly J. Cooper" <kcooper () bbnplanet ! com>
Date: 1998-02-13 23:31:25
[Download RAW message or body]
On Feb 13, 2:52pm, Randy Bush wrote:
> Subject: Re: Smurfing
*> o All router administrators on the immediately reachable
*> Internet needs to turn off directed broadcasts on their router
*> interfaces. It's conceivable that "a significant portion of
*> all" would do as well, but the magnitude of this problem
*> boggles the mind. First of all, we'd need to distribute the
*> appropriate amount of clue to all the corners of the net where
*> this needs to happen. Maybe, just maybe, we'll get there
*> sometime (I'm an optimist!).
*
*why should this not have become the default mode for all vendor diustributed
*router code?
*
*randy
>-- End of excerpt from Randy Bush
Perhaps because RFC 1812, "Requirements for IP Version 4 Routers" (which
I believe is still current) needs to be updated/made obsolete?
Excerpted from section 5.3.5:
A router MAY have an option to disable receiving network-prefix-
directed broadcasts on an interface and MUST have an option to
disable forwarding network-prefix-directed broadcasts. These options
MUST default to permit receiving and forwarding network-prefix-
directed broadcasts.
Or perhaps because the folks on this list haven't made it clear enough
to their vendors that the default should be "off" <hint>.
Kelly J.
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