[76293] in North American Network Operators' Group

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Re: Bogon filtering (don't ban me)

daemon@ATHENA.MIT.EDU (Cliff Albert)
Sun Dec 5 12:49:31 2004

Date: Sun, 5 Dec 2004 18:48:43 +0100
From: Cliff Albert <cliff@oisec.net>
To: Joe Abley <jabley@isc.org>
Cc: NANOG <nanog@merit.edu>
In-Reply-To: <E71C8F46-46E4-11D9-BE84-000D93B24C7A@isc.org>
Errors-To: owner-nanog-outgoing@merit.edu


On Sun, Dec 05, 2004 at 12:41:32PM -0500, Joe Abley wrote:

> >I have one question regarding the CYMRU bogon route-server. What good 
> >is
> >it if more-specific bogons are going around in the BGP table ?
> 
> With OpenBSD 3.6 running pf and bgpd, you can apply a filter rule to 
> BGP updates received from individual peers which updates a pf radix 
> table with the network received:

Interesting, but no option on Juniper/IOS boxes/foundry boxen. 

> This is an answer that is probably not useful for the average ISP 
> backbone, but I tried it out a week or so ago on my home network 
> firewall/router boxes, and it works very nicely. It's a good solution 
> for (say) an enterprise network whose external traffic falls within the 
> bounds of what an OpenBSD box can handle (or boxes, if you do stateful 
> failover with CARP and pfsync).

Indeed, for such purposes it's a nice solutions.

-- 
Cliff Albert <cliff@oisec.net>

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