Ricoh AFICIO MP C305SP Manual page 378

If you select [Entire] or [Simple (All)], proceed to step 16.
If you select [Simple (Limitation)], proceed to step 13.
12. Press [Change Limitation Range].
13. Specify the range in which [Simple (Limitation)] is applied to "Printer Job Authentication".
Pressing [ ] allows you to display all items.
You can specify the IPv4 address range to which this setting is applied, and whether or not to apply
the setting to the parallel and USB interfaces.
14. Press [Exit].
15. Press [OK].
16. Press [Exit], and then press [OK].
17. Press the [Login/Logout] key.
A confirmation message appears.
If you press [Yes], you will be automatically logged out.
User Code Authentication
35