Below is the effective configuration (ie; everything that is commented is removed) of a Windows based open DHCP server installation. The installation issues leases to Macs and routers, but not to a windows64 v7 professional client I have. The Win7 client can get leases from routers it’s connected to, wired and wireless. Excerpt of the logs are also below. The lease request s being made by the client and received by the server, but no lease is being given out to the Win 7 client while it is for all other devices I have plugged in. The Win 7 client is taking leases from other devices and the firewall is off so it’s not an obvious issue like that. My question is what am I missing in the configuration that is causing this? Any ideas as to why this is happening? I am stumped at this point. It should be working.

Thanks,
Tom

[LISTEN_ON]
23.145.20.9

[LOGGING]
LogLevel=All

[REPLICATION_SERVERS]

[HTTP_INTERFACE]
HTTPServer=23.145.20.9:6789

[RANGE_SET]

DHCPRange=23.145.20.10-23.145.20.254

SubnetMask=255.255.255.0
Router=23.145.20.9
AddressTime=360

[RANGE_SET]

[RANGE_SET]

[GLOBAL_OPTIONS]

[30-Jan-14 08:54:55] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:54:58] Network changed, re-detecting Static Interfaces..
[30-Jan-14 08:54:58] Lease Status URL: http://23.145.20.9:6789
[30-Jan-14 08:54:58] Listening On: 23.145.20.9
[30-Jan-14 08:57:59] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:58:03] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:58:10] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:58:25] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:58:58] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:59:01] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:59:09] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 08:59:25] DHCPDISCOVER for a0:36:9f:18:6c:88 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:01:38] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:01:42] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:01:50] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:02:05] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:02:37] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:02:41] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:02:49] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received
[30-Jan-14 09:03:05] DHCPDISCOVER for f8:b1:56:b0:4d:51 (net-tester-PC) from interface 23.145.20.9 received

Working client leases that are not the win7 PC.
[30-Jan-14 08:29:21] DHCPDISCOVER for 58:b0:35:f9:23:48 (Tetra) from interface 23.145.20.9 received
[30-Jan-14 08:29:21] Host 58:b0:35:f9:23:48 (Tetra) offered 23.145.20.10
[30-Jan-14 08:29:22] DHCPREQUEST for 58:b0:35:f9:23:48 (Tetra) from interface 23.145.20.9 received
[30-Jan-14 08:29:22] Host 58:b0:35:f9:23:48 (Tetra) allotted 23.145.20.10 for 360 seconds

[30-Jan-14 12:18:50] DHCPDISCOVER for bc:ee:7b:ef:d4:20 () from interface 23.145.20.9 received
[30-Jan-14 12:18:50] Host bc:ee:7b:ef:d4:20 (Hostbcee7befd420) offered 23.145.20.11
[30-Jan-14 12:18:50] DHCPREQUEST for bc:ee:7b:ef:d4:20 () from interface 23.145.20.9 received
[30-Jan-14 12:18:50] Host bc:ee:7b:ef:d4:20 (Hostbcee7befd420) allotted 23.145.20.11 for 360 seconds
[30-Jan-14 12:22:12] DHCPREQUEST for bc:ee:7b:ef:d4:20 () from interface 23.145.20.9 received
[30-Jan-14 12:22:12] Host bc:ee:7b:ef:d4:20 (Hostbcee7befd420) renewed 23.145.20.11 for 360 seconds