Six technical modes for H.323 traffic to travel through NAT are addressed and analyzed: H.323 proxy, application layer gateway, MIDCOM, tunneling, extended protocol, and Simple Traversal of User Datagram Protocol (STUN).

• 323协议穿越NAT的6种方式:H.；323代理方式、应用层网关方式、中间盒通信(MIDCOM)方式、隧道方式、扩展协议方式、STUN方式；并对不同的穿越方式进行了分析。