source filtering

Scott McGrath SMcGrath at YBP.com
Wed Jan 13 20:41:34 UTC 1999


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 at puck.nether.net]
> Sent:	Tuesday, January 12, 1999 12:31 PM
> To:	nanog at 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 at puck.nether.net
> clue++;      | http://puck.nether.net/~jared/  My statements are only
> mine.



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