Re: 239.255.255.250

[Vitaly Osipov <vosipov () WOLFEGROUP IE>]

AFAIK 239.0.0.0 is so-called administrative scope, and it has maximum ttl of
16, those packets should be blocked by routers on the borders of your
organisation (i.e. _you_ should block them to comply to RFC)

regards,
Vitaly.


----- Original Message -----
From: "Joe" <joe () blarg net>
To: <VULN-DEV () SECURITYFOCUS COM>
Sent: Monday, May 07, 2001 10:20 PM
Subject: Re: [VULN-DEV] 239.255.255.250


> On Mon, 7 May 2001, Jose Nazario wrote:
>
> > > available via the gateway). Even if you're ISPs routers let it
> > > through, there are no routes on the backbones that can take it
> > > anywhere, so the "public internet" is never going to see those
> > > packets.
> >
> > that's odd, given i've watched mutlicast stuff from well afar of my
local
> > network, or my ISP's network.
> >
> > multicast is indeed routable. its not a reserved block (like 10/8,
> > 192.168/16, or 172.16/12, RFC1918 address). please see the references
> > listed below for more information.
>
> Open mouth, insert foot, echo internationally. I need more coffee before
> reading mail. Ugh.
>
> --
> Joe                                     Technical Support
> General Support:  support () blarg net     Blarg! Online Services, Inc.
> Voice:  425/401-9821 or 888/66-BLARG    http://www.blarg.net
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