Getting issue while trying to access internet from private-subnet instance via nat intance in aws?

Question

I create a vpc with two subnets public and private.

In public subnet I used NAT instance for internet access. I trie to access internet which is in private subnet, but failed. I configured well for security groups and route tables. Is it necessary that NAT instance should be of m1.small type?

Answer 1

No nat box can have any instance type. However, in your private subnet's Route table, there should be an entry like this

Destination cidr: 0.0.0.0/0 Target:

If this is already in place, then check the security group. For testing try to open all traffic in all security groups that you have.

Answer 2

there might be chance you have not selected correct NAT instance while creating NAT instance in Step 1: Choose an Amazon Machine Image (AMI)
make sure you instance name contain "nat" ,

after clicking on Community AMIs and add filter for nat , it is not filtering correct name , make sure your instance name should contain "nat"

below are only nat Amazon Machine Image (AMI) available in community

• amzn-ami-vpc-nat-hvm-2018.03.0.20180811-x86_64-ebs
• amzn-ami-vpc-nat-hvm-2017.09.1-testlongids.20180307-x86_64-ebs
• amzn-ami-vpc-nat-hvm-2017.09.1.20180103-x86_64-ebs