[22636] in North American Network Operators' Group
RE: source filtering
daemon@ATHENA.MIT.EDU (Scott McGrath)
Wed Jan 13 16:25:19 1999
From: Scott McGrath <SMcGrath@YBP.com>
To: Jared Mauch <jared@puck.nether.net>, nanog@merit.edu
Date: Wed, 13 Jan 1999 15:41:34 -0500
GTE and ATT both filter via access lists on the customers CPE routers IF
they provide the routers to the customer
> -----Original Message-----
> From: Jared Mauch [SMTP:jared@puck.nether.net]
> Sent: Tuesday, January 12, 1999 12:31 PM
> To: nanog@merit.edu
> Subject: source filtering
>
>
> I'm interested in what providers actually do source
> filtering of their customers.
>
> Including:
>
> 1) Using access-lists to filter your customers
> 2) Using the "ip verifiy unicast reverse-path" Cisco feature
> (it's in 11.1CC images when you use CEF, so I don't get a flood
> of e-mails)
> 3) Using other router vendors and features you have to
> filter source addresses.
>
> I'd like to summarize this all and start a quest to fix
> providers that don't source filter (as people quest against spam, and
> against smurfable network blocks).
>
> jared
>
> --
> Jared Mauch | pgp key available via finger from jared@puck.nether.net
> clue++; | http://puck.nether.net/~jared/ My statements are only
> mine.
