
This is why AAA is so important. :-)

- ferg


-- "Steven M. Bellovin" <smb@cs.columbia.edu> wrote:

In message <20060112.195851.1587.15308@webmail05.lax.untd.com>, "Fergie" writes
:
>
>RFC2827/BCP38?
>

The problem is that an ISP can do all the source filtering it wants, 
but if it only blocks SYNs to port 25 all it takes is one unfiltered 
dial-up to spoof that ISP's addresses.

		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb


--
"Fergie", a.k.a. Paul Ferguson
 Engineering Architecture for the Internet
 fergdawg@netzero.net or fergdawg@sbcglobal.net
 ferg's tech blog: http://fergdawg.blogspot.com/


