I’ll keep this post short and sweet, you have lost your PFsense firewall/router Admin login password and need back in. Quick.
There are two options available to you:
To reset PFSense Admin password
Plug a monitor and keyboard into the PFSense appliance/server or connect to console
You can then select ‘Option 3) to reset the webGUI password.
Should this fail, or you have set an admin password to even get this far, then follow below;
1, Reboot appliance
2, Select boot option for ‘Single User Mode’
3, Hit enter to start /bin/sh
mount -a -t ufs
/etc/rc.initial.password and follow the prompts to reset password
Depending on what version o PFSense you are using, you will have just specified the new password, or if you did not have that option, then it will have reset to the PFSense default password of: Admin | pfsense
Let me know in the comments if this helped you or was useful to you in any way!