Hi, I have server 2008 configured as DC running AD DS, DNS, DHCP. NIC1 - Static IP - 10.0.0.1, Subnet - 255.0.0.0, Primary DNS - 10.0.0.1 NIC2 - Conntected to my DSL modem/router Cleints can log-in, I can ping to each computer server can connect to internet BUT the xp clients can NOT. IPCONFIG of XP clients shows NO Deafualt Gateway. What to do and in what way? Any ideas.

You should never multihome a DC (SBS is the only exception). And Active Directory is not compatible with the way DNS works in AD. You will need to run the DC with one NIC and have all machines (including the DC) use the DSL router as the gateway. You will need to disable DHCP on the router and change the way DNS works. All machines use the DC for DNS and the local DNS (on the DC) is set to forward to a public DNS service. The other option is to run some other machine as a router between the DSL nework/subnet and the domain network/subnet (and make this router the default gateway for the domain network). A Internet | DSL 192.68.0.1 | DC 192.168.0.11 dg 192.168.0.1 | dns 192.168.0.11 | clients 192.168.0.x dg 192.168.0.1 dns 192.168.0.11 B Internet | DSL 192.168.0.1 | 192.168.0.154 dg 192.168.0.1 NAT router 10.0.0.1 dg blank | DC 10.0.0.11 dg 10.0.0.1 | dns 10.0.0.11 | clients 10.0.0.x dg 10.0.0.1 dns 10.0.0.11Bill

You should never multihome a DC (SBS is the only exception). And Active Directory is not compatible with the way DNS works in AD. You will need to run the DC with one NIC and have all machines (including the DC) use the DSL router as the gateway. You will need to disable DHCP on the router and change the way DNS works. All machines use the DC for DNS and the local DNS (on the DC) is set to forward to a public DNS service. The other option is to run some other machine as a router between the DSL nework/subnet and the domain network/subnet (and make this router the default gateway for the domain network). A Internet | DSL 192.68.0.1 | DC 192.168.0.11 dg 192.168.0.1 | dns 192.168.0.11 | clients 192.168.0.x dg 192.168.0.1 dns 192.168.0.11 B Internet | DSL 192.168.0.1 | 192.168.0.154 dg 192.168.0.1 NAT router 10.0.0.1 dg blank | DC 10.0.0.11 dg 10.0.0.1 | dns 10.0.0.11 | clients 10.0.0.x dg 10.0.0.1 dns 10.0.0.11Bill

Hi ArshadJB, Thanks for posting here. We will never recommend to multihomed a domain controller and will not suggest to set it as a NAT server at edge either like what Bill mentioned , please consider to use a dedicate server with two NICs and set it as the NAT server . Here are the examples for reference : Deploying network address translation http://technet.microsoft.com/en-us/library/cc776872(WS.10).aspx Enable RRAS as a VPN Server and a NAT Router http://technet.microsoft.com/en-us/library/dd458971.aspx Thanks. Tiger Li Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.