North American Network Operators Group
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Re: SYN spoofing

  • From: Dan Hollis
  • Date: Wed Jul 28 17:53:26 1999 
On Wed, 28 Jul 1999, Jeremy Porter wrote:
> In message <[email protected]>, Dan Hollis wr
> ites:
> >Anyone for a weekly 'bogons transit list'?
> The problem being, that you would need to know where these packets
> originated, and if you knew that, you could probably get the problem
> fixed in the first place.

You really think so? Some of us have tried to persuade the 'big names' to
filter completely bogus source addresses, and were blown off.

> Lack of a soci-technological solution for interprovider backtracing
> limits the utility of this, and since you can't really pin point the 10
> ten bogon transit providers you don't have much ability to shame people
> into fixing their stuff.

You can at least conclusively show who is transporting the
invalid-source-address-packets to the endpoint. That is, conclusively show
that the next-to-last-hop isnt properly filtering.

-Dan