I have a PDC running DNS that is behind a Sonicwall 2040 firewall. I have configured my Sonicwall to be the DHCP. This works very well (internet speeds are terrific and hardly any latency). However some of my computers on the network cannot access the PDC! The computers will logon and they do not get access to profiles, startup scripts, etc... After hours of playing with the settings and calling tech support I found that if I installed DHCP on the PDC and disabled the DHCP on the firewall all the clients have access to Active Directory. However... although this works it is extremly inefficient WAN-wise compared to the DHCP being on the Firewall. Browsing sites lag anywhere from 3-8 seconds to load, even on simple sites such as Google. We rely heavily on internet applications and although this setup works for now it is far from desired. Calling sonicwall tech support left me empty handed and scouring the web for answers has turned up empty. I'm thinking this could be a configuration error on either the firewall, DNS, or AD. I can ping all network adapters on the PDC using the IP address however when I try to ping the hostname it fails (when the DHCP is on the firewall). I have not been able to pinpoint the cause and the event logs are empty. Has anyone had experience with something like this or have any suggestions? I can post more technical info or screenshots if needed.
Many Thanks for those who help!