Windows firewall rule for Open DHCP Server

The Windows firewall will normally block requests to the DHCP server, so an exception has to be added to the firewall fules.

Open Windows Defender Firewall with Advanced Security and go to Inbound Rules.

In General tab make sure the rule is enabled and Action is Allow the connection. In Programs and Services select the Open DHCP Server executable. In Protocols and Ports select UDP as Protocol type and enter 67, 68, 547, 546 as Specific Ports.  In the Advanced tab make sure the rule is selected for the current profile.