The Computer Science department developed Meetingpoint, a web based videoconferencing system. It is possible to use the RTMPT protocol on port 80, so potentially every PC connected to the Internet, with or without webcam, can be used to participate to the conference. Hospital network security policies make it often impossible to use synchronous audio-video communication systems such as Skype. We developed a complete multiuser videoconferencing system, with data sharing, application sharing, silde presentations capabilities. The system works finely in firewall protected networks, without violating any policy.