[Jool-list] BIB-less NAT64

[Sander Steffann]

Hi,

> mhh looks for me wrong. What happens if the source will connect with
> more than one connectionat the same time to the same target and port:
> 
> IPv6 client:port         Public v4:port        Dest v4:port
> [2001:db8::1]:60000  ->  192.0.2.1:54321  ->   ebay.co.uk:443
> [2001:db8::1]:50000  ->  192.0.2.1:54321  ->   ebay.co.uk:443
> [2001:db8::1]:40000  ->  192.0.2.1:54321  ->   amazon.com:443
> [2001:db8::a]:40000  ->  192.0.2.1:43210  ->   amazon.com:443
> [2001:db8::a]:30000  ->  192.0.2.1:43210  ->   amazon.com:443
> [.................]  ->  192.0.2.1:54321  ->   [............]

If multiple connections from the same source to the same destination are used then the NAT64 needs to use a separate port. But using the same port in the cases where the destination is different would be a massive saving on ports, and therefore on expensive IPv4 addresses.

> From my point of view this will break connections.

If it was implemented as you show then it would indeed break.

Cheers,
Sander

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