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    • 4. 发明授权
    • Remote location VOIP roaming behind firewalls
    • 远程位置VOIP在防火墙后漫游
    • US07664096B2
    • 2010-02-16
    • US10604072
    • 2003-06-25
    • James M. DohertyThomas Lee AdamsSteve Mueller
    • James M. DohertyThomas Lee AdamsSteve Mueller
    • H04L12/66H04L12/56
    • H04L63/029H04L29/06027H04L29/12066H04L29/12094H04L29/12301H04L29/12547H04L61/1511H04L61/1529H04L61/2076H04L61/2582H04L65/1006H04L65/1069H04M7/006
    • A connection between an external host and a host internal to a network (e.g., VPN or LAN) and located behind a firewall and/or NAT-enabled device is established and maintained. A dynamic DNS server is updated with the remote location (RL) information associated with the internal host. This information includes the dialed number (i.e. the number assigned to the internal host), the physical address of the internal host, the private IP address corresponding to the internal host, the public IP address corresponding to the firewall, and the port on which voice data is to be communicated. Each time the internal host's location changes, a new and updated record is sent to the dynamic DNS server. The call placed by an external host reaches its final destination based on the record information in the DNS server table. Once the connection between the external host and the internal host is established, voice traffic is “cut-through” the firewall on this channel associate with the port designated by the RL record.
    • 建立并维护外部主机与网络(例如,VPN或LAN)内部并位于防火墙和/或启用NAT的设备后面的主机之间的连接。 使用与内部主机相关联的远程位置(RL)信息更新动态DNS服务器。 该信息包括拨打的号码(即分配给内部主机的号码),内部主机的物理地址,对应于内部主机的专用IP地址,与防火墙相对应的公共IP地址以及语音端口 数据将被传达。 每次内部主机的位置发生变化时,会将一个新的和更新的记录发送到动态DNS服务器。 由外部主机拨出的呼叫根据DNS服务器表中的记录信息到达其最终目的地。 一旦建立了外部主机和内部主机之间的连接,则该通道上的防火墙与RL记录指定的端口相关联,语音流量就被切断。