专利名称：Methods and systems for per-session
network address translation (NAT) learningsession下载
and firewall filtering in media gateway
发明人：San-Qi Li,Weijun Lee,David Z. Lu
申请号：US10676240
申请日：20031001
公开号：US07380011B2
公开日：
20080527
专利内容由知识产权出版社提供
专利附图：
摘要：Methods and systems for per-session NAT learning and firewall filtering are disclosed. Media packets associated with a call/session are received and processed at a
media gateway. For the first few received media packets associated with a session, the media gateway uses various unique methods to learn the actual source IP address and UDP port assigned to the remote communication terminal by its customer-premises Network Address Translators (NATs) to the media flows of the current session. After the remote IP and UDP are learned, the media gateway reconfigures its firewall filtering function to check both the dynamically learned remote IP and UDP and the locally assigned IP and UDP of the current session. The per-session NAT learning function removes reachability issues in VoIP deployment, and the per-session firewall filtering function enhances security protection in VoIP deployment.
申请人：San-Qi Li,Weijun Lee,David Z. Lu
地址：Plano TX US,Plano TX US,Dallas TX US
国籍：US,US,US
代理机构：Jenkins, Wilson, Taylor & Hunt, P.A.
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