plugins: dns/ddclient: no-ip broken

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Describe the bug IP address changes to WAN interface are not detected and sent to No-IP service, and ddclient logs the following messages:

ddclient[43123]	60634 - [meta sequenceId="2"] WARNING: unable to determine IP address	
ddclient[43123]	59557 - [meta sequenceId="1"] WARNING: found neither ipv4 nor ipv6 address

Doesn’t matter what combination of Check ip method and Interface to monitor I use:

Check ip method: Interface, Interface to monitor: WAN Check ip method: noip-ipv4, Interface to monitor: WAN Check ip method: noip-ipv4, Interface to monitor: none

I prefer the Interface/WAN method as this keeps detection local and only sends data to no-ip when there are changes.

The generated ddclient.conf is:

daemon=300
syslog=yes                  # log update msgs to syslog
pid=/var/run/ddclient.pid   # record PID in file.
verbose=yes
ssl=yes

use=if, if=vtnet1, \
protocol=noip, \
login=xxxx, \
password=yyyy \
my.no-ip-name.net

I started using ddclient late last year, and this has “always” been an issue for me.

To Reproduce Steps to reproduce the behavior:

1. Add a Noip service
2. Choose Check IP method = Interface
3. Choose Interface to monitor = WAN

As mentioned I have also tried using Check IP method = noip-ipv4, same result.

Expected behavior The public IP is correctly detected, change sent to No-IP service if update is needed.

Relevant log files

ddclient[43123]	60634 - [meta sequenceId="2"] WARNING: unable to determine IP address	
ddclient[43123]	59557 - [meta sequenceId="1"] WARNING: found neither ipv4 nor ipv6 address

Workaround Modifying the ddclient.conf as follows:

From:

use=if, if=vtnet1, \

To:

use=if, if=vtnet1

And restarting the service - but this only persists until next reboot or update.

Environment OPNsense 22.1.9 (amd64, OpenSSL) Proxmox VM Host CPU pass-through: Intel® Core™ i3-8109U CPU @ 3.00GHz (2 cores, 2 threads) Network: VirtIO