Internal LAN

Subnet: 192.168.0.0/21 (192.168.0.0 thru 192.168.7.254)

Subnet mask: 255.255.248.0

Default gateway: 192.168.1.1

DNS: 192.168.1.15, 192.168.1.59 Forwarders: Neustar

DHCP range: 192.168.4.2 - 192.168.5.254

The main Windows server (.15) does DHCP. If it goes down for any significant length of time, enable DHCP on the Untangle box. It uses separate segments (.6 and .7) so won't eff up existing leases.