AWS VPC can t access Internet despite configuring NAT Internet Gateway according to rules

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I'm a bit lost on that one - I've followed AWS documentation and it seems that there is nothing more I can find. The situation summary is that I have an EC2 instance within a VPC and it can't reach the Internet despite following Amazon AWS instructions in setting up a NAT for the VPC

  1. I have a VPC with one subnet (CIDR 10.0.0.0/24) and one EC2 instance in (it has private IP address within VPC only, 10.0.0.168)

  2. I have created an Internet Gateway and attached it to the said VPC.

  3. I have created a Network ACL with All Traffic Allow for 0.0.0.0/0 for both Inbound and Outbound traffic and attached the ACL to the VPC's only subnet.

Mar 14, 2022 in Others by Edureka
• 13,630 points
290 views

1 answer to this question.

0 votes

You'll need two subnets. One is public, and the other is private.

Subnet that is open to the public

Public IP addresses can be enabled on a public network. It must have a NAT gateway as well as a route table:

Target Subnet 10.0.0.0/24
 local 0.0.0.0/0 internet-gateway private subnet

The private subnet should be used for your private instance. A route table should be present on the subnet:

10.0.0.0/24 is the local destination target.
0.0.0.0/0 nat-gateway-id \sNACL

It is preferable to leave the default NACLs alone. It's quite easy to make a mistake with these. Only security groups should be used to control access to and from your instance.

answered Mar 25, 2022 by Edureka
• 13,630 points

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