| 摘要 |
A multimedia firewall adapter (202) supplements a conventional firewall (204) to allow transmission of videoconferencing data e.g., audio and video data associated with a protocol, such as the H.323 protocol. The multimedia firewall adapter (202) supplements the conventional firewall (204) so that audio and video data associated with the H.323 protocol are allowed to pass through the multimedia firewall adapter (202), thus circumventing the conventional firewall (204). The multimedia firewall adapter (202) receives signals from an intranet (203) and Internet (205), decomposes the signals, and attempts to authenticate the decomposed signals according to the H.323 protocol. If the decomposed signals are authenticated to contain videoconferencing data, the multimedia firewall adapter (202) negotiates and establishes a connection, and allows the videoconferencing data to pass through. However, if the signal is not authenticated, then the signal is blocked from passing. The blocked signal is redirected to the conventional firewall (204) for analysis. |
