Canon VB-H43 Operation Manual page 72

IPv6 Host Access Restrictions
(1) [Apply Host Access Restrictions]
Set IPv6 host access restrictions to [Disable] or
[Enable].
(2) [Default Policy]
If IPv6 host access restrictions are applied, select
[Authorize Access] or [Prohibit Access] for the default
policy.
(3) [Prefix / Prefix Length]
Create a list of permitted hosts and restricted hosts
and set IPv6 address access for each host to [Yes] or
[No].
You can specify the prefix length and set access
restriction by network or host.
If access is prohibited, access to all ports is
restricted.
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