Brain fart. Getting old. Maybe no more a Guru?
Anyway question is:
Got a Windows 2003 Server 2003 R2 X64, 2 NIC's (Dell Server).
Got DSL, (Verizon router/modem combo), set one NIC to 192.168.1.149 with DSL modem/router 192.168.1.1. (Gateway and DNS set to 192.168.1.1) Goes to 3 PC's, Internet access.
Got the other NIC at 192.168.2.149 and no Gateway or DNS set in Properties. Goes to a switch feeding 5 PC's, all static.
Purpose here is to keep the subnets separate, meaning 3 PC's on 192.168.1.149 NIC that have Internet access should not be able to be compromised and have others see, ping, browse, etc., to anything on the 192.168.2.149 network (5 other PC's).
All seems to be A-OK, except that the "Internet PC's" can browse/see the other network (albeit they request login and password).
What am I doing wrong here, like I said, 2 NIC's, Server 2003, DSL on one NIC, LAN (Intranet) on other NIC... keep segregated.......diagrams work my brain is tired.