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Home › Forums › AWS › AWS Certified Advanced Networking – Specialty › NLB Client IP preservation vs Proxy protocol V2 › Reply To: NLB Client IP preservation vs Proxy protocol V2

  • jersyogg

    Member
    August 11, 2025 at 6:31 pm

    Client IP Preservation lets your backend see the real client IP without extra setup, and it works by default on AWS NLB for TCP targets. Proxy Protocol V2 adds a header with client info but requires your backend to support parsing it. Use Client IP Preservation when possible and enable Proxy Protocol only if needed (e.g., cross-VPC).

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