I solved it.
was too easy. Sorry to bother you.
just startet my WAN interface using ifconfig, added a default route and then opnsense-bootstrap did the magic. It kept all configuration. I just had to reinstall some additional packges like wireguard.
was too easy. Sorry to bother you.
just startet my WAN interface using ifconfig, added a default route and then opnsense-bootstrap did the magic. It kept all configuration. I just had to reinstall some additional packges like wireguard.