RFC 1918 addresses on source and destination networks.
If in transport mode, IPSec does not encrypt the original IP header, but instead leaves it exposed for routing purposes, is it then true that you cant run IPSec transport mode when you have private address on both ends? You cant route private addresses over the public Internet, of course...hence, my question.
In tunnel mode, the original IP packet is totally encapsulated by an IPSec packet and the IPSec tunnel endpoints are the address that are exposed and used for routing the user traffic. So, of course, tunnel mode is perfectly acceptable
So, if I understand you correctly, what you're saying is that the only way to use IPSec transport mode with private addresses is to NAT them to public addresses --- which makes perfect sense and is something I would have done. I was wondering if I understood the technology and its limitations correctly in the first place, though.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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