| SIP穿越防火墙/NAT(-PT)的探讨和设计 |
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| 引用本文： | 李卿,乔元松,郑慧.SIP穿越防火墙/NAT(-PT)的探讨和设计[J].计算机工程与设计,2005,26(5):1294-1298. |
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| 作者姓名： | 李卿 乔元松 郑慧 |
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| 作者单位： | 中国科学院,软件研究所多媒体中心,北京,100080;中国科学院,软件研究所多媒体中心,北京,100080;中国科学院,软件研究所多媒体中心,北京,100080 |
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| 摘 要： | SIP协议作为NGN的重要协议，广泛地应用于视频会议和IP电话中，但是由于SIP本身不支持穿越防火墙和地址翻译，大大限制了SIP的进一步发展。参照当前的SIP穿越技术，结合对SIP协议本身的分析，提出了一种采用应用层网关配合MidCom协议，能够透明地支持SIP穿越带防火墙的NAT和NAT—PT的方案。方案能够简单而有效地控制防火墙，透明地支持NAT和NAT-PT两边的互相呼叫，并拥有部署的灵活性。
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| 关 键 词： | SIP 应用层网关 防火墙 NAT NAT_PT |
| 文章编号： | 1000-7024(2005)05-1294-05 |
Discussion and design of SIP traversing firewall/NAT (-PT) |
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| LI Qing,QIAO Yuan-song,ZHENG Hui.Discussion and design of SIP traversing firewall/NAT (-PT)[J].Computer Engineering and Design,2005,26(5):1294-1298. |
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| Authors: | LI Qing QIAO Yuan-song ZHENG Hui |
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| Abstract: | SIP is the important protocol of NGN, which is used in the net meeting and VoIP widely. But the limitation of SIP cannot traverse Firewall/NAT blocks the development of SIP. With the state-of-the-art techniques and the SIP protocol, a schema is proposed to support SIP traversing Firewall/NAT (-PT) transparently with the cooperation of SIP ALG and MidCom protocol. The schema can simply, effectively control firewall, and support bi-directional call traversing NAT (-PT) transparently. The schema also has the ability of deploy agility. |
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| Keywords: | SIP ALG firewall NAT NAT_PT |
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