I have a sad network left behind by some careless admins - I am in process of figuring out exactly what services are running where, not excluding the possibility that some services are running from two places at once, which is tons of fun. There are 2 Windows 2003 servers, one Windows 2008 server with Exchange 2010 on it and a SonicWall TZ210 between the LAN and the WAN. Computers connected via DHCP reveal the gateway IP that corresponds to the SonicWall unit, however it doesn't have DHCP enabled.
Anyone have any ideas as to where and how I might discover what IS running DHCP so I could administer it? I am also concerned about internal DNS and Windows domain services as there appears to be confusing information on the network that conflicts with itself.