DHCP server not working, error messages from the router.

[Melissa Young]

Hello,

This DHCP/DDNS server was working, so the
configuration should be fine. After putting offline
for a couple of weeks, now it keeps getting errors
like this:

BOOTREQUEST from 00:20:49:48:7a:18 via dmfe0: BOOTP
from dynamic client and no dynamic leases

This "00:20:49:48:7a:18" is the MAC address of the
router connecting to the DHCP server. DHCP service is
not working and every client update is denied.

Please help. Thanks a lot in advance!

Melissa Young,
System Admin