Hi folks, I have OS X server (5.4) running on a mac mini, running High Sierra 10.13.2. I have configured DHCP server with start, end, subnet, interface, gateway and DNS settings, and configured a couple of static leases for some clients. Too easy, although I wish you could just cut and paste MAC addresses when configuring static leases! (is there a way to bulk load them?) I then turn on the DHCP server. I turn off the DHCP server on my router. Request a new DHCP lease from a client ... and ... nothing. I then checked access settings on the OS X server and configured Access for any user, from any network for ports UDP 67 and 68 for the DHCP service. Still ... nothing. I then turned off firewall altogether, ... and ... nothing. I checked that pf was not active, still ... nothing. Any further suggestions, please? kind regards, Dave.