![]() When NGINX is acting as a proxy, each connection to an upstream. For more information, see Compare security groups and network ACLs.Īs mentioned above, it is better to solve it with SG if possible. AWS Network ACLs and ephemeral port ranges - Web10. However, you can use network ACLs if you want an additional layer of security. The web server accepts the requests, and 'borrows' an ephemeral port from the server. What happens is the client sends a request on the established port, like 80, for an initial HTTP request. In most cases, security groups can meet your needs. Ephemeral ports are really high numbered ports that are required for successful http or ssh connections. Network ACLs allow or deny inbound and outbound traffic at the subnet level. ![]() ** Security groups allow inbound and outbound traffic for associated resources, such as EC2 instances. ![]() You can replace this part with the connection port used between the WAS server and the web server. Therefore, the security group is supposed to open port 1433 between the web server and the DB. In this scenario, a database on a private subnet and a web server located on a public subnet communicate with each other and are connected to the Internet through NAT. It is expected that the situation in the official document at the link below is almost the same as what you inquired about. AWS Command Line Interface (AWS CLI) Provides commands for a broad set of AWS services, including Amazon VPC, and is supported on Windows, Mac, and Linux. Since you didn't specify which port to use, I'll give you a guide for general situations.
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