erlang udp multicast

    {ok, Socket} = gen_udp:open(Port, [binary, {active, false},
                                       {reuseaddr, true},{ip, Addr},
                                       {add_membership, {Addr, LAddr}}]).

where the Addr is the multicast group, and LAddr is a local interface.

http://www.erlang.org/pipermail/erlang-questions/2003-March/008070.html

출처

How to extend the Windows Server 2008 evaluation period

http://support.microsoft.com/kb/948472