How to Assign Proxy to EC2 Instance

To assign a proxy to your EC2 instance, you have a few options depending on your specific needs and the services you're using. Since you're accessing the EC2 instance via Remote Desktop, I'll focus on Windows-based solutions.

1. For general system-wide proxy settings:

   You can configure the proxy settings through Internet Explorer, which will affect many Windows applications:

   • Open Internet Explorer
   • Click on the Tools button (or gear icon)
   • Select Internet Options
   • Go to the Connections tab
   • Click on LAN settings
   • Check the box for "Use a proxy server for your LAN"
   • Enter your proxy server address and port
   • If required, click on Advanced to enter username and password

2. For the EC2Config service:

   If you need the EC2Config service to communicate through the proxy:

   • Open the Local Group Policy Editor (type gpedit.msc in the Run dialog)
   • Navigate to Computer Configuration > Administrative Templates > Windows Components > Internet Explorer
   • Enable the "Make proxy settings per-machine (rather than per-user)" policy
   • Then follow the steps above to configure Internet Explorer proxy settings

3. For specific applications:

   Some applications may require you to configure proxy settings within their own configuration files or settings. You'll need to refer to the specific application's documentation for details.

4. For AWS services:

   If you're using AWS SDKs or CLI tools, you may need to set environment variables like HTTP_PROXY and HTTPS_PROXY with your proxy details.

Remember to include the protocol (http:// or https://) when entering your proxy server address. If your proxy requires authentication, you may need to include the username and password in the proxy address like this: http://username:password@proxy_ip:proxy_port

After configuring the proxy, you may need to restart your EC2 instance or specific services for the changes to take effect. Also, ensure that your security groups and network ACLs allow traffic to and from your proxy server.

Sources
Configure .NET proxy settings for the EC2Config service - Amazon Elastic Compute Cloud
Using an HTTP proxy for Amazon ECS Linux container instances - Amazon Elastic Container Service