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    • 104. 发明申请
    • Firewall penetration system and method for real time media communications
    • 防火墙渗透系统和实时媒体通信方法
    • US20050033985A1
    • 2005-02-10
    • US10627594
    • 2003-07-26
    • Chen XuHuang PanShih-An ChengJing-Yao Huang
    • Chen XuHuang PanShih-An ChengJing-Yao Huang
    • H04L9/00H04L29/06
    • H04L63/0236H04L63/029
    • A system for initiating and maintaining a real time audio or video media session between two clients, at least one of which has a private network IP address and is supported by a NAT firewall, comprises a proxy server serving each client and a relay server. The first proxy server may receive an invite message from a caller client to initiate a media session with a callee client. The invite message will identify the IP address and media port number of the caller client. The proxy server queries the relay server to obtain a port number of the relay server that may be used for relaying the media session between the caller client and the callee client. The proxy server will replace the IP address and port number of the caller client with the IP address and port number of the relay server in the invite message before forwarding to the callee client. When the callee client generates a response message that includes the IP address and media port number of the callee client, the proxy server will replace the IP address and media port number of the callee client in the response message before forwarding the response message to the caller client.
    • 一种用于在两个客户端之间启动和维护实时音频或视频媒体会话的系统,其中至少一个具有专用网络IP地址并由NAT防火墙支持,该系统包括为每个客户端和中继服务器提供服务的代理服务器。 第一代理服务器可以从呼叫者客户端接收邀请消息以发起与被叫方客户端的媒体会话。 邀请消息将标识呼叫者客户端的IP地址和媒体端口号。 代理服务器查询中继服务器以获取中继服务器的端口号,该端口号可用于在呼叫者客户端和被叫客户端之间中继媒体会话。 代理服务器将在转发给被叫方客户端之前,将邀请消息中的中继服务器的IP地址和端口号替换为主叫方客户端的IP地址和端口号。 当被叫客户端生成包含被叫方客户端的IP地址和媒体端口号的响应消息时,代理服务器将在响应消息中替换被叫方客户端的IP地址和媒体端口号,然后将响应消息转发给呼叫方 客户。