dhcpd.conf how to secure so only known and allowed clients will be given dhcpd IP address leases -

dhcpd.conf how to secure so only known and allowed clients will be given dhcpd IP address leases

It's really simple and just a matter of the following line within the subnet declaration.

  deny unknown-clients;

See example below:

subnet 10.25.20.0 netmask 255.255.255.0 {
  range 10.25.20.11 10.25.20.254;
  deny unknown-clients;
  option routers 10.25.20.10;
  option domain-name-servers 208.67.222.222;

   host client05 {
   hardware ethernet aa:bb:cc:dd:ee:ff;

   }

}

 

After that only clients with a declared host statement will be able to get a DHCP lease increasing security a little bit.

 


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