Subj : IPv6 in R46
To   : Michiel van der Vlist
From : Alex Shuman
Date : Tue Jan 17 2023 05:44 pm


 x) Monday Jan 16, 2023, 16:22. Michiel van der Vlist ÄÄ Alex Shuman.

 MvdV>>> https://pulse.internetsociety.org/blog/ipv6-to-the-stars
 AS>> Indeed, Kyivstar introduced IPv6 mobile internet, with severe bugs
 AS>> though, they use DS-lite
 MvdV> Are you sure it is DS-Lite? My understanding is that DS-Lite is only
 MvdV> used on "fixed" networks and that mobile networks use IPv6 only with
 MvdV> IPv4 via DNS64/NAT64.

Yes, because they assign IPv4 over NAT (with 192.0.0.4 local IP and 46.x.x.x 
external IP), so IPv4-only networks are accessible this way.

 MvdV> Kyivstar deploys both mobile and fixed networks do they?
 AS>> and their DNS servers often resolve IPv4-only DNS into NAT64
 AS>> (64:ff9b::) addresses...
 MvdV> Which would be the usual way for IPv6 on;y mobile networks.

 AS>>  Using other DNS servers works, though.
 MvdV> Maybe they still need to iron out the theething problems.

Well, if they are actually providing IPv4 in form of DS-lite, they should 
resolve IPv4 hosts into their native IPv4.

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