I wonder if the issue has anything to do with the fact that the VPN
creates a new network link that disappears when the VPN goes down - note
that the purestorage.com domains are listed for tun0 when the VPN is up.
When I turn off the VPN, tun0 disappears but the purestorage.com domains
stay in the Global part of the status output:
$ systemd-resolve --status
Global
DNS Domain: home.digitalvampire.org
purestorage.com
dev.purestorage.com
DNSSEC NTA: 10.in-addr.arpa
16.172.in-addr.arpa
168.192.in-addr.arpa
17.172.in-addr.arpa
18.172.in-addr.arpa
19.172.in-addr.arpa
20.172.in-addr.arpa
21.172.in-addr.arpa
22.172.in-addr.arpa
23.172.in-addr.arpa
24.172.in-addr.arpa
25.172.in-addr.arpa
26.172.in-addr.arpa
27.172.in-addr.arpa
28.172.in-addr.arpa
29.172.in-addr.arpa
30.172.in-addr.arpa
31.172.in-addr.arpa
corp
d.f.ip6.arpa
home
internal
intranet
lan
local
private
test
Link 17 (tun0)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 10.231.255.252
10.230.255.252
DNS Domain: purestorage.com\032dev.purestorage.com
purestorage.com
dev.purestorage.com
Link 3 (wlp4s0)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 2001:470:1f05:221::1
10.1.0.1
DNS Domain: home.digitalvampire.org
Link 2 (enp0s31f6)
Current Scopes: none
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
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https://bugs.launchpad.net/bugs/1717995
Title:
extra domains not removed from resolv.conf when VPN disconnects
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