-When using private link service, the source IP address of the packets coming from private endpoint is network address translated (NAT) on the service provider side using the NAT IP allocated from provider's virtual network. Hence the applications receive the allocated NAT IP address instead of actual source IP address of the service consumers. If your application needs actual source IP address from consumer side, you can enable Proxy protocol on your service and retrieve the information from the proxy protocol header. In addition to source IP address, proxy protocol header also carries the LinkID of the private endpoint. Combination of source IP address and LinkID can help service providers uniquely identify their consumers. For more information on Proxy Protocol, visit here.
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