netmeeting

[paul]

Hi friends,                  i'm using IPchains as my NAT/Firewall gateway with a ppp0 interface to the ISP, i can establish a connection to another party thru netmeeting, but there isn't any video showing up on either site.                   Are there any ports that i have to allow out or in? whatever the case, i need help ! hahah, thks in advance!   rgds Paul