[Jool-list] Node-based translation with LTE

[Alberto Leiva]

I'm just a developer so these networking hacks struggle to stay in my
memory, but I understand this problem is typical of services
implemented as virtual interfaces (which we're emulating by enclosing
the translator in a separate namespace).

So... I can't give you any details, but I hope I can kick-start you by
mentioning that I have seen people do this in two different ways:

1. proxy-nd: https://github.com/NICMx/Jool/issues/177#issuecomment-144648229
2. Give some private IPv6 address to Jool, then once the packet
reaches the host, IPv6 NAT (NAT66) it into the proper public IPv6
address.

A lot of people dislike NAT66 as a concept, so maybe try option 1 first.

And I'm not sure if proxy-nd is the same as "bridging the two
interfaces," but if not, that would be another option.

This mailing list doesn't see much traffic. Nowadays we have a chat
going on at https://matrix.ungleich.ch/#/room/#jool:ungleich.ch, and
you can probably find much more knowledgeable people there. In fact,
we recently touched the subject last Friday.

On Tue, Feb 6, 2024 at 6:44 AM Mosbeck Martin via Jool-list
<jool-list at nic.mx> wrote:
>
> Hello everyone,
>
> thanks for this great tool and the amazingly good documentation!
>
> I have a question regarding node-based translation (as described in
> https://nicmx.github.io/Jool/en/node-based-translation.html). I would
> like to
> use this for a router which has a public IPv6 LTE connection and clients
> connected to it via a private IPv4 LAN. Both router and clients have
> applications with hardcoded IPv4 addresses.
>
> I’m wondering what to choose as the "proxy address for the private Jool's
> traffic" (2001:db8:1::3 in the example). From first experiments - which
> worked
> nicely - I understand, this address is not really private, but used in
> packets
> sent via the Internet. From my LTE provider I get an IPv6 address with a /64
> prefix. Can I just pick any address inside this /64 subnet without risking
> address collisions with someone else? Can I be sure that any IPv6 LTE
> provider
> always offers me some range of addresses rather than only a single one?
>
> Thank You & Best
>
> Martin
>
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