Opnsense default password all covered in great detail below:
|User name||Password||Deafault IP|
OPNsense® is a FreeBSD based firewall and routing platform that is open source, simple to use, and simple to construct. High-end functions like forward caching proxy, traffic shaping, intrusion detection, and simple OpenVPN client configuration are included in OPNsense’s feature set.
OPNsense’s emphasis on security results in special features like a version based on HardenedBSD and the choice to use LibreSSL rather than OpenSSL (selectable in the GUI).