man dhcp-options
option fqdn.no-client-update flag;
When the client sends this, if it is true, it means the client \\
will not attempt to update its A record.
When sent by the server to the client, it means that the client \\
should not update its own A record.
option fqdn.server-update flag;
When the client sends this to the server, it is requesting that the server update its A record. When sent by the
server, it means that the server has updated (or is about to update) the client's A record.
# # DHCP Server Config File #
ddns-update-style none; ignore client-updates;
lease-file-name "/var/lib/dhcpd/dhcpd.leases"; authoritative;
default-lease-time 86400; # 24 hours max-lease-time 172800; # 48 hours
subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.101 192.168.1.200;
ddns-domainname "home.lan";
option domain-name "home.lan";
option domain-name-servers 192.168.1.5;
option netbios-name-servers 192.168.1.5;
option netbios-dd-server 192.168.1.5;
option routers 192.168.1.5;
option ntp-servers 192.168.1.5;
ddns-update-style ad-hoc;
option netbios-node-type 8;
option ip-forwarding off;
option non-local-source-routing off;
option perform-mask-discovery off;
option router-discovery off;
option tcp-keepalive-garbage off;
}