I'm trying to geta fresh installation of WIndows Server 2008 R2 64bit to allow internet access to my LAN computers.
I've wiped the machine and started again several times. The first time I tried, it worked no problem. I started again because MS Exchange went awry - that's a different story. I know - it's a bad idea to have Exchange on a DC - I'm testing stuff out.
The configuration is ADSL router>Server 2008>switch>LAN
The WAN nic is set to 192.168.1.1, subnet 255.255.255.0, gateway 192.168.1.254 (router IP), DNS 127.0.0.1
LAN nic is set to 192.168.16.1, subnet 255.255.255.0, no gateway, DNS 127.0.0.1.
When everything is set up, IPCONFIG /ALL confirms this - the server can access the internet, and also see LAN computers.
The DNS server has the forwarders of my ISP - that's all good.
The DHCP server has the router enabled in both "server options" and "scope options".
RRAS is installed and working as a NAT router - it knows which nic connects to the internet.
The LAN computers can see the server, browse it, ping it, whatever.
IPCONFIG /ALL when run on a LAN machine is fine - all present and correct. They have the gateway of the server (192.168.16.1), and the DNS server is the same...BUT...they cannot ping the router at 192.168.1.254.
Surely this is a DNS problem?
I'm moving to Server 2008 as an upgrade from 2003 - I know that like the back of my hand and never had this problem.
What am I doing wrong? Someone help me please before my heads explodes.