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I am creating a site-to-site vpn to make a request from aws to my on premises. Here, is the screenshot(AWS Console) of a VPN connection that I created. My question is: Is it mandatory to assign local ipv4 and remote ipv4 network cidr or I can just keep 0.0.0.0/0?

Peter
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By default, it is 0.0.0.0/0 as it states under your AWS Console when you are trying to create a connection.

aws-vpn-s2s-network-cidr-optional

I believe that it is optional, to be more secure, you should only input a fixed network range that you would like to maintain the least privileges access from on-premise and vice versa.

Binh Nguyen
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