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.

 

Latest Articles

  • AMD Set Fan Speed and Other Powerplay Memory/CPU Timings with a Linux script
  • Ethereum Mining Claymore Nanopool Error
  • genisoimage errors with long filenames and deep directory structures
  • Linux Kernel USB Export Errors
  • How to download gajim 0.16.9 XMPP/Jabber client so you can use OMEMO encryption
  • HP DL385 G7 Linux BIOS Update Flash
  • hwloc-nox set CPU affinity in Linux
  • Firefox An error occurred during a connection to some-ip-or-domain. SSL peer reports incorrect Message Authentication Code. Error code: SSL_ERROR_BAD_MAC_ALERT Solution
  • Proxmox understanding the directory structure and why an NFS datastore appears to be missing files/isos
  • pandoc convert markdown to html
  • Proxmox error uploading an iso solution
  • Cannot install moodle
  • MySQL change for Antelope format to Barracuda error solution
  • vmkping -I vmk1 10.0.2.69 PING 10.0.2.69 (10.0.2.69): 56 data bytes sendto() failed (Host is down)
  • gvfs mount in /run/user cannot be accessed or displayed wrong permissions
  • VMWare vSphere 6.7 Errors Solution 503 Service Unavailable (Failed to connect to endpoint:
  • How To Enable Nested KVM so guests can virtualize with hardware extensions
  • vi error solution E166: Can't open linked file for writing
  • Supermicro IPMI / KVM / BMC Remote Console Screen Resizing Issue - Window Cut Off Solution
  • Linux bash shell doesn't show username, hostname or current path fix solution