nanog mailing list archives

Re: engineering --> ddos and flooding


From: Jim Shankland <nanog () shankland org>
Date: Fri, 1 Jun 2001 08:44:19 -0700


Dan Foster <dsf () frontiernet net> writes:

I, too, am much looking forward to the proposed standards to turn this
kind of thing into a non-event. :)

Well, look no further than here, for your prayers are answered:

        On any connection to an end-user, ISPs shall forward only
        packets with source addresses assigned to that end-user by
        the ISP.  Exceptions can be made for multi-homed
        end-users: e.g., if an end-user has 1.2.3.0/24 from ISP A,
        and 5.6.7.0/24 from ISP B, each ISP may choose to accept
        packets with source addresses from the block assigned by
        the other ISP, by prior arrangement with the end-user and
        the other ISP.

Now, if you're looking forward to the *implementation* of this
proposed standard, you had best be looking through a very strong
telescope.  It will happen some time after the last open SMTP relay
on the Internet is secured :-(.

Jim Shankland


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