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/