|I am having an issue with DHCP/DNS on a server (domain controller) I am currently configuring. The scenario is:|
Router connected to the Internet is on 192.168.100.254
Domain Controller is on 192.168.100.1
The domain controller has its default gateway set to 192.168.100.254 (the router) and DNS pointing to itself (DNS is installed with Active Directory and forwarders have been setup with web based DNS servers when local resolve fails). The domain controller has no issues with connecting to the Internet.
The domain controller is also running a DHCP server which is leasing IP addresses to clients in the LAN within the range 192.168.100.20 to 192.168.100.250, the default gateway for the DHCP is set to the domain controller's IP address (192.168.100.1).
The problem: Although clients on the LAN can obtain a valid IP configuration from the server and ping the domain controller and other computers in the LAN, they can not reach the Internet. Interestingly (or not) nslookup does resolve the domain name i.e. google.com [18.104.22.168] but pinging by DNS name or IP address does not work (host unreachable).
I have already switched off DHCP on the router and disabled the firewall on the router, LAN computer and the domain controller to no avail.
Any suggestions? If I am going about this the wrong way please let me know (or point me in the right direction, I'm happy to read/research further). Thanks.