The Dynamic Host Configuration Protocol (DHCP) is used to control vital networking parameters of hosts (running clients) with the help of a server.
To modify the following setting for DHCP, enter a new value in the Current column, and then click Apply:
Check If Client Source Port is 68: Allows you to set the device to verify that the client’s source port is 68. This feature is disabled by default (0). Set the value to 1 to enable this feature.