Hello: i am network administrator in a private small business firm. i shar internet through isa server my client cant see webcam behind the isa server becuase when they go to see the other person webcam yahoo show the message you are behind the firewall. what i do please help me and send me link or document or anything else which help me in this matter. i am very thankfull to you for this help my email address is shahidmajeed@xxxxxxxxxxxx