We have a DNS server on local network which has some custom TLDs such as "local, dummy" etc. The domains ending with these TLDs resolves to test servers like *win2003test.dummy*.

The problem occures when a VPN connection is up. Windows tries to resolve these domain with another DNS server assigned by VPN server. This prevents dummy domain-to-ip translations.

Is there an easy setting somewhere with which I can overcome this issue?

PS: Remote gateway in VPN setting is disabled.