Canon VB150 User Manual page 54

Example 4: To prohibit access from hosts in a given address range while permitting access
Example 5:To prohibit access from hosts in a given address range while permitting access
c
Note
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from one host within that range
172.20.0.10
!172.20.0.0-172.20.0.20
Access from hosts with IP addresses from 172.20.0.0 to 172.20.0.20 is prohibited,
except for the host at 172.20.0.10, from which access is permitted.
from a range of hosts within that range
172.20.0.10-172.20.0.15
!172.20.0.0-172.20.0.20
Access from hosts with IP addresses from 172.20.0.0 to 172.20.0.20 is prohibited,
except for the hosts with addresses between 172.20.0.10 and 172.20.0.15, from
which access is permitted.
● If you do not make a list, access is permitted to all hosts.
● If the list provided prohibits access for all hosts, the Host Restriction
function is disabled and access is permitted to all hosts.
● To prohibit access over HTTP connection via a proxy server, the address of
the proxy server must be set.
● If you set the host restriction incorrectly, access to the settings page itself
may be denied. In this event, the problem can only be recovered by
restoring the factory default settings.