plz give suggestion plz.. plz... help me rescue me

hi,

i am doing jmf project .. one to one , one to many, many to one... video chat...

i completed just one to many transmit and one receive from many using RTP ...in thesething port number matchning must between trasmitter and receiver.. this would be problem since on receiver dont know in what port i transmit... how to avoid this ..

this not work in behind firewall ,,, it need static ip (public ip) ....if client connect with me through proxy means i didnot get his ip addresss... there are problem..

i tried save and tranmsit through HTTP URL help of web server..... but this not seem as realtime conversation..

what are way i can use to tansmit and receive ...without above problem... plz give suggestion

this would be helpful to me

[783 byte] By [param530a] at [2007-10-1 0:55:31]