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The Host Restriction function is to restrict hosts, in which viewers and other client
applications are running. Access restriction is available with a list including single or
multiple entries, described in the following format.
Listing Format
“ ! ” addr “ -addr2 ”
● “addr” is written in the standard IP address format.
● Because the IP addresses in “addr” and “addr2” define the range of IP addresses,
if an IP address A is higher than “addr” and lower than “addr2”, the IP address A is
included in the addr-addr2 range. The addr2 parameter can be omitted, in which
case it is taken to be the same value as addr.
● If the entry begins with “!”, then access will be denied. If not, access will be authorized.
● If an address of host corresponds to more than one entry, the settings for the first
corresponding entry from the top of the Host List are used for determining whether
access is authorized or restricted. Therefore, note that in the examples 3 to 5
given below the entry of addresses to be authorized must be specified before the
addresses to be restricted.
● Redundant or contradictory entries included in the list are automatically deleted.
● If the given address does not belong to any of the entries, access is authorized.
Example 1: To prohibit access from a host
!172.20.0.10
Access from the host with an IP address of 172.20.0.10 is prohibited.
Example 2: To prohibit access from hosts in a given address range
!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.
Example 3: To authorize access from hosts in a given address range while
prohibiting access from other hosts
172.20.0.10-172.20.0.12
!0.0.0.0-255.255.255.0
Access is only authorized from hosts with IP addresses from 172.20.0.10 to
172.20.0.12 is prohibited.
Example 4: To prohibit access from hosts in a given address range while
permitting access 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.
Example 5: To prohibit access from hosts in a given address range while
permitting access 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.
Set User Access Privileges (Access Control)