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<p>This article describes&nbsp;scenarios of IGW.</p> <p><strong>Provide Services with a Single Cloud Host&nbsp; </strong></p> <p>If the user has only one application with small business scale, a single cloud host can meet the requirements. Users can deploy applications, databases, and files on the cloud host. Then purchase an IGW gateway to create an ECS and apply for an Internet IP. Bind this cloud host to the Internet IP to provide external services.</p> <p><strong>Provide Services to the Internet by Multiple Cloud Hosts</strong></p> <p>If multiple cloud hosts are needed to support large traffic, you can create classic ELB and add multiple cloud hosts to the server resources pool. Then, purchase an IGW and apply for a DNAT Internet IP. When you configure the ELB as the intranet IP, it can provide external services.</p> <p><strong>A Single Cloud Host Actively Accesses the Internet</strong></p> <p>If the cloud host needs to actively access the Internet, you can purchase an IGW gateway, create an ECS, apply for an Internet IP, and bind the cloud host to the Internet IP. Then, you can actively access the Internet.</p> <p>&nbsp;</p>
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