point to point VPN issue

[#1]

Hi, I am new to FortiGate and wonder is someone can help with the following issue: We have a point to point VPN setup (via the FotiGate firewall) form our overseas office to the London Office. The VPN tunnel is working without any issues and the clients PC’s are configured with static ip address with the DNS server pointing to the domain controller (also the DNS server) in the London office. However two PC’s which is configured exactly the same as the other PC’s in the overseas office cannot ping the DNS server via ip or host name in the London office -it responds back with the WAN IP of the overseas internet connection. The PC can ping all other servers in the London office without any problems apart form the DNS server. Furthermore if the DNS server on the two PC’s are changed to the internet connection on the overseas office then the pc is able to ping the DNS server in the London office without any problem. All the PC’s are configured in the same way; please note the following has been done on the every PC in the overseas office: 1. The host file has been modified with all eiib servers 2. The NIC have static ip address entry with, the DNS server pointing to the London office DNS server. Many Thanks

[rwpatterson]

In the DNS section on the Windows boxes, insure that the domain is correct. Also confirm that the default gateways and subnet masks are correct. These sound like Windows issues.

[#3]

Thank you for the replay. I have chcked all the settings and all seem correct, DNS suffix is also correct with the domain name.