> use DNSStubListenerExtra=
It's indeed this directive I'm using on the downstream interface. Maybe
I should have mentioned that.
Configuration / results (MACs etc. obfuscated, but all correct on the
running system):
# head -n-0 /etc/systemd/network/linux-dummy_local0.{netdev,network}
==> /etc/systemd/network/linux-dummy_local0.netdev <==
[NetDev]
Description=[...]
Kind=dummy
Name=local0
==> /etc/systemd/network/linux-dummy_local0.network <==
[Match]
Name=local0
[Network]
Description=[...]
Address=<static IPv6>/64
Address=<static IPv4>/24
DNSSEC=false
Domains=~home.example.org
LLMNR=false
MulticastDNS=false
# networkctl status local0
5: local0
Link File: /usr/lib/systemd/network/99-default.link
Network File:
/etc/systemd/network/linux-dummy_local0.network
Type: ether
State: routable (configured)
Online state: online
Driver: dummy
Hardware Address: <MAC>
MTU: 1500
QDisc: noqueue
IPv6 Address Generation Mode: eui64
Queue Length (Tx/Rx): 1/1
Address: <static IPv4 as configured in *.network>
<static IPv6 as configured in
*.network>
fe80::[...]
Route Domains: home.example.org
Activation Policy: up
Required For Online: yes
DHCP6 Client DUID: DUID-EN/Vendor:[...]
Mai 08 23:08:07 rpi3b-router systemd-networkd[378]: local0: netdev ready
Mai 08 23:08:07 rpi3b-router systemd-networkd[378]: local0: Link UP
Mai 08 23:08:07 rpi3b-router systemd-networkd[378]: local0: Gained carrier
Mai 08 23:08:07 rpi3b-router systemd-networkd[378]: local0: Gained IPv6LL
# ip address show local0
5: local0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default qlen 1000
link/ether [...] brd ff:ff:ff:ff:ff:ff
inet [...]/24 brd [...] scope global local0
valid_lft forever preferred_lft forever
inet6 [...]/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::[...]/64 scope link
valid_lft forever preferred_lft forever
# resolvectl status local0
Link 5 (local0)
Current Scopes: none
Protocols: -DefaultRoute -LLMNR -mDNS -DNSOverTLS
DNSSEC=no/unsupported
DNS Domain: ~home.example.org
And with all these results a querying a DNS server on local0 e. g. by
"drill @<IP of local0> home.example.org" works but "resolvectl query
home.example.org" fails.
