Re: Multicast?

Merlin wrote:
> 
> Hello,
> 
>  
> 
> I tried to figure out how to do multicast videos the last few hours but 
> I still don´t know.
> 
>  
> 
> I managed to do unicast and it worked but how has the config to look 
> like for multicast?
> 
>  
> 
> This is the example entry from the config file:
> 
>  
> 
> BEGIN "multicast"                        # multicast example
>   Type    = "multicast"
>   DstHost = "239.2.12.42"                # multicast address
>   DstPort = "1234"                       # destination port
> END
> 
> What I don´t understand is the IP address. I thought the clients can 
> "join and go" when they want.
> 
> What IP I have to enter when I run a mulicast server and how to 
> configure it correctly? So that let´s say all people from the IP 
> addresses 192.168.0.1-192.168.0.100 could join?
> 
A client needs an IP address to join and leave. For this multicast 
addresses have been defined. The valid multicast addresses range from:
224.0.0.0 till 239.255.255.255, but I would exclude 224.0.0.0 till 
224.0.0.255 and 239.255.255.0 till 239.255.255.255 because they are used 
for administration purposes by multicast routers and MBONE stuff.

What you want is limited range of ip-adresses that may join YOUR 
multicast. This is not possible because of the nature of multicast. It 
is meant to be viewed by any number of people that you do not know. If 
you like to control that, then you need to make sure that the topology 
of your network shields your private multicast to other networks. Or use 
an encrypted tunnel between the clients and the server involved.

> Maybe I am just too silly but help would really be appreciated a lot.
> 
>  
> 
> Thank you so much!
> 



-- 
Kind greetings,

Jean-Paul Saman

Software Architect

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phone  (work): 040 27 42909
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