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Hi from Bavaria,
I have some strange behavior after years without problems.

I'm not sure if there is a connection between the latest update or not.
Current version: OPNsense 23.7.11-amd64

I found a very similar issue in the legacy discussion board: https://forum.opnsense.org/index.php?topic=37244.0

Please allow me to summarize the behavior of ddclient (checked on the CLI):

Provider: No-IP
OPNsense on APU4 with Vigor 165

Getting information from interface

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usev4=ifv4, ifv4=pppoe0,

causes:

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root@router:~ # ddclient -file /usr/local/etc/ddclient.conf -foreground
WARNING:  '' is not a valid IPv4 or IPv6 address
WARNING:  found neither IPv4 nor IPv6 address
WARNING:  <domain>.DDNS.NET: unable to determine IP address with strategy use=ip
WARNING:  Could not determine an IP for <domain>.DDNS.NET

Using noip-ipv4 via GUI

causes:

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root@router:~ # ddclient -file /usr/local/etc/ddclient.conf -foreground
WARNING:  '' is not a valid IPv4 or IPv6 address
WARNING:  found neither IPv4 nor IPv6 address
WARNING:  <domain>.DDNS.NET: unable to determine IP address with strategy use=ip
WARNING:  Could not determine an IP for <domain>.DDNS.NET

but a manual start of the command delivers the correct IP:

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root@router:~ # /usr/local/opnsense/scripts/ddclient/checkip -i pppoe0 -t 0 -s noip-ipv4 --timeout 10
217.238.xxx.yyy
root@router:~ #


The final solution was:

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use=web, web=freemyip.com/checkip,

With this IP-determination-technology everything works fine and the records was updated.

But as far as i remember this change is not "restart resistant".


Regards