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Summary

Adds support for explicitly providing EIP allocation IDs for fallback NAT Gateways.

Changes

  • Introduced new input variable fallback_nat_eip_allocation_ids
  • Updated main.tf logic to skip EIP creation when explicit IDs are provided
  • Added corresponding documentation in README.md

Motivation

Allows users to reuse pre-allocated EIPs (e.g., allow-listed addresses) for fallback NAT Gateways, ensuring predictable IPs and avoiding unnecessary EIP creation or simplify whitelisting of new addressea, CIDR blocks.

@xenozauros xenozauros requested review from a team and bwhaley as code owners November 13, 2025 09:32
@xenozauros xenozauros changed the title Feat/custom ngw ips Feat: add support for fallback ngw IPs (BYOIP for fallback NGW) Nov 21, 2025
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