Joshtronic 3/1/2026

Whitelisting AWS NAT Gateway IP Addresses

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A technical blog post detailing a DevOps challenge with AWS NAT Gateways. The author explains that whitelisting only the 'Primary public IPv4 address' can cause failures after deployments, as each subnet associated with the gateway has its own IP. The article provides a practical solution for correctly identifying and whitelisting all necessary IP addresses in external services.

Whitelisting AWS NAT Gateway IP Addresses

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