connectivity check

[Bojan Pogacar]

Hi!

This is my 20-connectivity.conf file:

[connectivity]
uri=http://network-test.debian.org/nm
interval=60

When testing with iptables to disable WAN connectivity like this: 
iptables -I OUTPUT -o eth1 -j DROP

connection on first attempt switches over to LTE. Then I reenable WAN 
and disable again. Then I get LIMITED connectivity because of this:

Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.1602] connectivity: (wwan0,IPv4,95) start request to 
'http://network-test.debian.org/nm' (try resolving 
'network-test.debian.org' using systemd-resolved)
Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.1677] connectivity: (wwan0,IPv6,96) skip connectivity check 
due to no IP address configured
Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.1684] connectivity: (wwan0,IPv6,96) check completed: NONE; 
no IP address configured
Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.2590] connectivity: (wwan0,IPv4,95) can't resolve a name via 
systemd-resolved: GDBus.Error:org.freedesktop.DBus.Error.Timeout: All 
attempts to contact name servers or networks failed
Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.2619] connectivity: (wwan0,IPv4,95) start request to 
'http://network-test.debian.org/nm' (try resolving 
'network-test.debian.org' using system resolver)
Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.2765] connectivity: (wwan0,IPv4,95) failure to resolve name: 
Error resolving “network-test.debian.org”: Temporary failure in name 
resolution
Jun 07 14:31:09 10-0-0-5 NetworkManager[12389]: <debug> 
[1717770669.2770] connectivity: (wwan0,IPv4,95) check completed: 
LIMITED; resolve-error

wwan0 has internet connection, but DNS resolver is not working, because 
default route is on WAN, which I blocked.

I tried this setting: uri=http://1.1.1.1 <- IP instead of domain, but it 
still tries to resolve http://1.1.1.1 and it doesn't succeed. It does 
not recognise, that resolver is not needed.

How can I resolve the issue? I have compiled into NetworkManager these 
plugins: modemmanager ppp concheck

Full config:

# NetworkManager configuration: /etc/NetworkManager/NetworkManager.conf 
(etc: 20-connectivity.conf)

[main]
# plugins=
# rc-manager=auto
# migrate-ifcfg-rh=false
# auth-polkit=true
# dhcp=internal
# iwd-config-path=
dns=systemd-resolved
configure-and-quit=no

[connectivity]
uri=http://network-test.debian.org/nm
interval=60

[logging]
# backend=journal
# audit=false
level=DEBUG

[device]
# wifi.backend=wpa_supplicant

Lep pozdrav / best regards,

Bojan Pogacar
+386 31 262 535

On 1. 06. 24 17:07, Andrei Borzenkov wrote:
> On 01.06.2024 10:34, Bojan Pogacar wrote:
>> Hi!
>>
>> Trace logs at the bottom:
>>
>>   > busctl get-property org.freedesktop.NetworkManager
>> /org/freedesktop/NetworkManager org.freedesktop.NetworkManager
>> ConnectivityChe
>> ckEnabled
>> b false
>>
>>   > busctl get-property org.freedesktop.NetworkManager
>> /org/freedesktop/NetworkManager org.freedesktop.NetworkManager
>> ConnectivityCh
>> eckAvailable
>> b true
>>
>>   > sudo busctl set-property org.freedesktop.NetworkManager
>> /org/freedesktop/NetworkManager org.freedesktop.NetworkManager
>> ConnectivityCheckEnabled b true
>>
>>   > busctl get-property org.freedesktop.NetworkManager
>> /org/freedesktop/NetworkManager org.freedesktop.NetworkManager
>> ConnectivityChe
>> ckEnabled
>> *b false ---> why?
>> *
>>
>
> Is your NetworkManager compiled with connection check enabled at all?