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Re: what's 224.0.0.0 -- and other newbie net-questions



On Thu, Jun 22, 2000 at 01:08:02AM -0500, Will Trillich wrote:

> Q: what's the 224.0.0.0 ip/netmask for?
That's for multicast. I don't know much about multicast, maybe someone
else can help there.

> Q: what's the scheme behind ports '* -> *'?
From any port to any port.

> Jun 20 00:18:00 server kernel: IP fw-in deny eth0 ICMP/10 172.146.51.93 224.0.0.2 L=28 S=0x00 I=50959 F=0x0000 T=128
> Jun 20 00:18:03 server kernel: IP fw-in deny eth0 ICMP/10 172.146.51.93 224.0.0.2 L=28 S=0x00 I=51215 F=0x0000 T=128
> Jun 20 00:17:57 server kernel: IP fw-in deny eth0 ICMP/10 172.146.51.93 224.0.0.2 L=28 S=0x00 I=50191 F=0x0000 T=128
> 
> there's that 224.0.0.* address, which may be unrelated.
> 
> the other address is always a 172.*.*.* number; the addresses
> change, but for each 172.*.*.* address there's always four
> to twleve hits or so.
The 172.146.51.93 resolves to AC92335D.ipt.aol.com and 224.0.0.2
resolves to ALL-ROUTERS.MCAST.NET, so it looks as though something at
AOL is broadcasting something to all multicast routers.

Cheers,
Tom
-- 
Do you guys know what you're doing, or are you just hacking?

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