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<p>This article describes main features of Ping An Cloud IGW, including Ethernet Connection Service<strong> </strong>(ECS) and DNAT.</p> <p><strong><span style="font-size:18px">Ethernet Connection Service (ECS) </span></strong><strong><span style="font-size:18px"> </span></strong></p> <p>Internet connection allocates an Internet IP to a cloud host instance and configures security policies for the IP address to realize interconnection between the cloud host and the Internet.</p> <p><span style="font-size:18px"><strong>DNAT</strong></span></p> <p>IGW provides DNAT service, which can map Internet IP applied in DNAT to the classic ELB instance of the intranet. In this way, the ELB instance can provide services for the Internet.</p> <p>DNAT supports IP mapping and port mapping.</p> <p>&bull;&nbsp;&nbsp;&nbsp;&nbsp; <strong>IP Mapping</strong></p> <p>IP mapping maps the intranet IP to Internet IP so that specified ELB instance uses the specified Internet IP to provide services to the Internet.</p> <p>&bull;&nbsp;&nbsp;&nbsp;&nbsp; <strong>Port Mapping</strong></p> <p>Port mapping maps a port of the Internet IP to the ELB instance of the intranet, so that the specified ELB instance provides services to the Internet via the specified Internet IP and port.</p>
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