NOTE:
1. The number of the last field (mentioned 'd' field) of 'End IP' must be
greater than 'Start IP', and can not be the same as router's IP address.
2. The former three fields of IP address of 'Start IP', 'End IP', and 'IP
Address of 'LAN IP' section (mentioned 'a', 'b', and 'c' field) should be the same.
3. These settings will affect wireless clients too.
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