Paste your VPC ID, public subnet ID, and CIDR block into the parameters.
Ensure that your public subnet has Enable auto-assign public IPv4 address turned on. This can be found in the Console at VPC > > Subnets > Edit subnet settings > Auto-assign IP settings.
Add the default route to your route table on the subnet. It is best to do this manually so you can do a seamless cut over from your > existing nat gateway. Go to VPC > Route Tables > PUblic route table > Routes > Edit Routes Add a 0.0.0.0/0 route pointing to the network interface.
Maybe my configuration is different, but in my case, if you remove the internet-gateway route from the public route table you will no longer have access to the internet.
I believe this should be changed from Public route table to Private route table:
Go to VPC > Route Tables > PUblic route table > Routes > Edit Routes Add a 0.0.0.0/0 route pointing to the network interface.
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Go to VPC > Route Tables > Private route table > Routes > Edit Routes Add a 0.0.0.0/0 route pointing to the network interface of the FCK-NAT instance.
Maybe my configuration is different, but in my case, if you remove the internet-gateway route from the public route table you will no longer have access to the internet.
I believe this should be changed from Public route table to Private route table:
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