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The IPv6 prefix length to define the client subnet.
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The IPv4 network address that must be used as ECS for all outbound requests overriding client's actual subnet.
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The IPv6 network address that must be used as ECS for all outbound requests overriding client's actual subnet.
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Warning! EDNS Client Subnet (ECS) option when enabled will compromises user's privacy since the DNS server will send the user's public IP network subnet to name servers or forwarders when resolving requests. When not using encrypted DNS protocols, this information can also be read passively by anyone on the network.

Note! EDNS Client Subnet (ECS) option allows passing the user's client subnet information to name servers or forwarders so that the response may contain IP addresses of servers closer to the user's geographic region. EDNS Client Subnet (ECS) option thus is only useful when the DNS server is hosted in a geographically different region compared to the users that are configured to use it.

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Enable this option to allow DHCP server to find out if an IP address is already in use to prevent IP address conflict when some of the devices on the network have manually configured IP addresses.
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Enable this option to allow DHCP server to find out if an IP address is already in use to prevent IP address conflict when some of the devices on the network have manually configured IP addresses.
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Enable this option to allow the DHCP server to automatically update forward and reverse DNS entries for clients.
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Enable this option to allow the DHCP server to automatically update forward and reverse DNS entries for clients.
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Enable this option to automatically use this DNS Server.
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Enable this option to automatically use this DNS Server.
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Enable this option to stop dynamic IP address allocation and allocate only reserved IP addresses.
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Enable this option to stop dynamic IP address allocation and allocate only reserved IP addresses.
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Enable this option to stop dynamic IP address allocation for clients with locally administered MAC addresses. MAC address with 0x02 bit set in the first octet indicate a locally administered MAC address which usually means that the device is not using its original MAC address.
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This option when enabled will always use the client's MAC address as the identifier to allocate lease instead of the Client Identifier (Option 61) provided by the client in the request. Some Linux distros use a custom Client Identifier instead of the device's MAC Address which can cause issues when the Virtual Machine (VM) in which the OS is installed is cloned causing both the original and cloned clients to get same IP allocated. There can be issues too when the same client changes its Client Identifier and starts getting a different IP address lease. Enabling the Ignore Client Identifier option will fix such issues. Changing this option may cause the existing clients to get a different IP lease on renewal.
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Enable this option to stop dynamic IP address allocation for clients with locally administered MAC addresses. MAC address with 0x02 bit set in the first octet indicate a locally administered MAC address which usually means that the device is not using its original MAC address.
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Note! Dynamic updates should be allowed only to trusted IP addresses since they will be able to add/delete records in the zone. If no security policy is configured below then access will be provided only based on the options selected here. Thus setting up a security policy below is highly recommended.
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Security Policy