In collaboration with Mike W. from WEIInc, (basically, they gave me the code and I tweaked it a little bit), here is a patch for enabling the ISC DHCP 3.0.1rc10 server to run in the Cygwin environment on WinNT/Win2K/WinXP. I've tested it on WinNT and WinXP. See the example-dhcpd.conf that gets created by the patch for how to limit responses to one interface on multihomed systems. The patch creates