wg-multicast - Re: input on tightening up multicast filtering
Subject: All things related to multicast
List archive
- From: "Charles R. Anderson" <>
- To: wg-multicast <>
- Subject: Re: input on tightening up multicast filtering
- Date: Wed, 8 Dec 2004 22:01:38 -0500
On Thu, Dec 02, 2004 at 04:22:00PM -0500, Matthew Davy wrote:
> (5) Blocked MSDP, PIM, and multicast data packets for IANA reserved
> groups (ie 225/8-231/8, 234/8-238/8). This along with #4 goes a long
> way to reducing the impact of worms scanning in 224/4 space.
I've gone further than this and limited the RP-to-group mappings to
only those ASM blocks that are allocated by IANA:
External RP:
224.0.1.0/24
224.0.2.0/23
224.0.4.0/22
224.0.8.0/21
224.0.16.0/20
224.0.32.0/19
224.0.64.0/18
224.0.128.0/17
224.2.0.0/16
233.0.0.0/8
Internal RP:
229.55.150.208/32
239.0.0.0/8
- input on tightening up multicast filtering, Matthew Davy, 12/02/2004
- Re: input on tightening up multicast filtering, Charles R. Anderson, 12/08/2004
- <Possible follow-up(s)>
- Fwd: input on tightening up multicast filtering, Kevin C. Almeroth, 12/08/2004
- Re: Fwd: input on tightening up multicast filtering, John Kristoff, 12/08/2004
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