Canon iR3245 Network Manual page 70

If you want to restrict the IPv6 addresses of computers from which data (print/
fax/I-fax job) can be sent to the machine:
<Apply Settings> of [Permit IPv6 Address] for <RX/Print Range>: [On]
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Press [Register] → store only one IPv6 address or a range of IPv6 addresses that are to be
permitted. Also specify the prefix and prefix length for the IPv6 address.
<Apply Settings> of [Reject IPv6 Address] for <RX/Print Range>: [On]
Press [Register] → store only one IPv6 address or a range of IPv6 addresses that are to be
rejected. Also specify the prefix and prefix length for the IPv6 address.
If you do not want to restrict the IPv6 addresses of computers on which
themachine setting items can be set or browsed (using the Remote UI or a
utility):
<Apply Settings> of [Permit IPv6 Address] for <Setting/Browsing Range>: [Off]
<Apply Settings> of [Reject IPv6 Address] for <Setting/Browsing Range>: [Off]
3-18 TCP/IPv6 Settings