What is the release / package version in use of systemd?
234-2ubuntu12.1
How is the networking configured: netplan, ifupdown, networkd, networkmanager?
networkmanager (I presume, ubuntu 17.10 default)
What is the contents of /etc/resolv.conf?
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.53
Where does the symlink of /etc/resolv.conf point to? (if it is a symlink)
../run/systemd/resolve/stub-resolv.conf
What is the contents of /etc/systemd/resolved.conf ?
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See resolved.conf(5) for details
What is the output of $ systemd-resolve --status ?
(if --status option is available)
Global
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 2 (wlp2s0b1)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 172.16.50.1
Is this a captive portal hostage situation with Ubuntu failing to get to the captive portal to enable internet?
Yes.
What is the release / package version in use of systemd?
234-2ubuntu12.1
How is the networking configured: netplan, ifupdown, networkd, networkmanager?
networkmanager (I presume, ubuntu 17.10 default)
What is the contents of /etc/resolv.conf? resolved( 8). Do not edit.
# This file is managed by man:systemd-
#
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.53
Where does the symlink of /etc/resolv.conf point to? (if it is a symlink) systemd/ resolve/ stub-resolv. conf
../run/
What is the contents of /etc/systemd/ resolved. conf ?
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See resolved.conf(5) for details
[Resolve] r=udp
#DNS=
#FallbackDNS=
#Domains=
#LLMNR=yes
#MulticastDNS=yes
#DNSSEC=no
#Cache=yes
#DNSStubListene
Is libnss-resolve package installed?
No.
What is the output of $ systemd-resolve --status ?
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
(if --status option is available)
Global
DNSSEC NTA: 10.in-addr.arpa
Link 2 (wlp2s0b1)
Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
LLMNR setting: yes
MulticastDNS setting: no
DNSSEC setting: no
DNSSEC supported: no
DNS Servers: 172.16.50.1
Is this a captive portal hostage situation with Ubuntu failing to get to the captive portal to enable internet?
Yes.