LAN Name Resolution different from Internet

Hi,


I have a Windows Server 2003 acting as a DNS, and an Exchange Server 2003. My Internet connection is through a standard ADSL Router.

My mail domain name - mail.company.com - has the correct internet MX records and this points to my router. The router has a Virtul Server setting which redirects packets to my Exchnge Server and everything works fine for any Internet traffic, OWA, ActiveSync etc.

However from my LAN mail.company.com points to the router and the router doesnt redirect the packets to the Exchange Server, and in fact IE will open up the router configuration pages. This makes logical sense as my DNS has no entry for mail.company.com so it redirects the request to the Internet DNS which returns the IP Address of the router etc.

I think that the solution is to add a DNS record to my LAN DNS pointing mail.company.com at the LAN IP Address of the Exchange Server, so any computers using this DNS, i.e. those on the LAN get the LAN IP Address of the Exchange Server and computers on the Internet get the IP Address of the router.

However when I set up mail.company.com on my LAN DNS the addresses ftp.company.com etc, IP Addresses that need to remain pointing to the Internet IP Addresses all get lost.

My question is therefore, what sort of DNS record do I need to add to my LAN DNS Server so that only mail.company.com is provided by the LAN DNS and and *.company.com lookups are redirrected to the Internet DNS.

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A.Rajesh Khanna