The login-password authorization is set for ports 9000-9999 (1000 ports). It is usually being used for manual, quick integration and includes the following parameters:
Ports: from 9000 and up to 9999 (depends on the number of ports available for your package).
Protocols - HTTP or SOCKS5.
Take a look at the following video to learn how to connect via login/pass :)
IP authorization requires the following parameters:
Whitelisting your IP address
Port number - starting from 10000
Please keep your IP filters empty if you need to use the login/password authorization again.
This GIF will let you know how to create filters and export a proxy list: