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IPSEC Identification Payload with NAT-T

Hi All,

 I have a question which may seem a bit weird to you but it it stuck in my head. When we have PAT device in front of VPN gateway we have to use one of the workarounds which is NAT-T. But my question is in Message 5 and 6 of negotiations gateways send their interface IPs (If hostname not configured) and my gateway sitting behind PAT will put its private IP in payload. However other side is configured to receive connection from Public IP. Should not it create a problem for VPN upcoming?

 

Thanks in advance! 

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