Re: BLS FastAccess internal tech needed

["Steven M. Bellovin" <smb () cs columbia edu>]

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