ircd-hybrid operator configuration

I know exactly what you mean about this. I struggled to figure it out myself for several hours before I figured this out:

operator {
    name = "root"; //Log in to oper with the name root
    user = "*@192.168.*.*";  //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 to 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.