I know exactly what you mean about this. I struggled to figure it out myself for several hours before I figured this out:
name = "root"; //Log in to oper with the name root
user = "*@192.*.*.*"; //Allow oper from any username on the local network
password = "YqvbpMDkkEhyY"; //hello encoded with /usr/bin/mkpasswd
With that config, you would use oper like this:
/oper (name) (password)
/oper root hello
If you get:
Only few of mere mortals may try to enter the twilight zone
Check and make sure that you are using the right name in the /oper command and the user field is including your client.
Also make sure you don't forget a semi-colon... It will not tell you, just give you the normal Password Incorrect response.