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This article mainly explains how to solve the problem that EC2 in a private subnet cannot connect to the Internet using NAT gateway. Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's take you to learn how to solve the problem that EC2 in a private subnet cannot connect to the Internet using NAT gateway.

I created a NAT gateway to access the Internet through an EC2 instance in a private subnet, but my instance was unable to connect to the Internet. How do I fix this?

Analysis:

To troubleshoot instances that cannot connect to the Internet from private subnets using NAT gateways, check the following:

Verify that a destination is reachable by pinging it from another source using a public IP address.

Verify that the NAT gateway is available. If the NAT gateway is in the Failed state, follow the troubleshooting steps in NAT Gateway to enter the Failed state.

Note: After approximately one hour, NAT gateways in a failed state are automatically deleted.

Ensure that you have created NAT gateways in the public subnet and that the public routing table has default routes to the Internet gateway.

Ensure that the routing table for the private subnet has a default route to the NAT gateway.

Note: Make sure you are not using the same routing tables in both private and public subnets; this does not route traffic to the Internet.

Check that you allow the required protocols and ports for outbound traffic to the Internet.

Ensure that you have allowed Internet access on the security groups and network ACL associated with the VPC and that you do not have any rules blocking traffic. For example, if you are connecting to a server, consider allowing traffic on HTTP port 80 and HTTPS port 443 using the destination IP address 0.0.0/0.

At this point, I believe that everyone has a deeper understanding of "EC2 in the private subnet cannot use NAT gateway to connect to the Internet". Let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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