Re: [Sheflug] igpm packets?

[Will Newton <nospam [at] misconception.org.uk>]

On Tue, 14 Nov 2000, ross wrote:

> 22:10:24.898668 213.105.116.217 > 224.0.0.1: igmp query [ttl 1]
> 22:12:23.708656 213.105.116.217 > 224.0.0.1: igmp query [ttl 1] 
> 
> the ip address is not the one allocated to me by my isp so, i guess these are 
> incomming packets?
> 
> can anyone help with this one?

IGMP is like ICMP but for multicast. Not sure exactly what this is, but
basically multicast broadcasts information to help it build a broadcast
tree depending on the routing protocol and lot's of other fun stuff.
So that machine is running IGMP and trying to find out if your machine is
a multicast machine. TBH I've never actually seen multicast "in the
wild" outside of LANs.


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