Subj : List of IPv6 nodes
To   : Victor Sudakov
From : Alexey Vissarionov
Date : Sun Jan 09 2022 09:21:00

Good ${greeting_time}, Victor!

08 Jan 2022 13:48:30, you wrote to me:

 TK>>>> I have a wireguard server running in my VPS (Ubuntu 20.04.3
 TK>>>> LTS). It is using a /112 of /64 for it's clients.
 VS>>> Do you mean to say you can have a /64 network on your VPS' main
 VS>>> interface and at the same time a /112 from the *same* *network*
 VS>>> on a wg0 interface? Is this even permitted by the OS?
 AV>> Yes - at least properly configured Linux allows this.
 VS> What do you mean by "properly configured"? You mean the
 VS> out-of-the-box configuration still does not allow this?

Obviously.

 VS> A Cisco router would not allow the same L2 network on two different
 VS> L3 interfaces IMHO, even if one of the prefixes is more specific.

That's a limitation of BSD-style IP stack.


--
Alexey V. Vissarionov aka Gremlin from Kremlin
gremlin.ru!gremlin; +vii-cmiii-ccxxix-lxxix-xlii

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