REPLY: 2:5020/545 61d92f73
MSGID: 2:5005/49 61d935b4
CHRS: CP866 2
TZUTC: 0700
TID: hpt/fbsd 1.9.0-cur 2019-12-05
Dear Alexey,

08 Jan 22 09:29, 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.

What do you mean by "properly configured"? You mean the out-of-the-box
configuration still does not allow this?

A Cisco router would not allow the same L2 network on two different L3
interfaces IMHO, even if one of the prefixes is more specific. If it would,
how should it know whether the destination is behind a gateway or can be
reached by ARP/NDP?

Victor Sudakov, VAS4-RIPE, VAS47-RIPN
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