Can you use transport mode with IPsec processing to provide confidentiality between two hosts in geographically separate private IP networks?
I have read somewhere that transport mode is the default mode to use to provide end to end confidentiality using IPsec processing which makes sense when the two end hosts have public IP addresses.
But what if the end hosts have private IP addresses? Surely the "use transport for end to end" doesn't apply in this case as private IP packets from private network X are tunnelled to private network Y?
I'm very confused. My question is...
how can IPsec be used to provide confidentiality for communications between two hosts A and B in geographically separate private IP networks