Hi, First of all thanks a lot for your answers about my doubt to be received... really thanks :-) Now, can someone help me to perform something? I have a visio-conference to allow to occur... So, I need to open certain ports in corelation with ports used by the application (someone has to communicate them to me... and I'd like to reserve a bandwith of 128Kb for a client PC and these ports that will be used for this visio-conference in order to allow a good performance for the conference and without boring the other Internet users. Can someone help me about how to set an amount off bandwith for a such client PC? Thanks in advance. Thierry