IP DVR SERVER
USER MANUAL
22
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Calculation method for Subnet mask value is based on the binary scale. Based on this,
255.255.255.255 would be 11111111.11111111.11111111.11111111 in binary scale and total
number of bit is 32 and 255.255.255.0 would be 11111111.11111111.11111111.0 in binary
scale and total number of bit would be 24.
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Access will be controlled only if the configured IP address and Subnet mask value’s bit value
match the IP address and Subnet mask value’s bit value are perfect match. Conditions will be
met from top to bottom (starts with 1 and ends with 10), and setting that meets all the
conditions will be granted an access or prohibited from access.
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For example, when IP address of IP DVR SERVER is 192.168.1.200 and user would like to deny
an access from group of IP address from 192.168.1.1~254, but only allow 192.168.1.254 to
granted an access, setting would be like the following example;
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If a user from blocked IP address tries to access the IP DVR SERVER, the following message
will be shown.
504 Service Protected.
Sorry, this site is protected. Your IP '192.168.1.21' is denied by filter rule.
