DNS setting so external dns resolves to the internal dns server

Discussion in 'DNS Server' started by Gee, Aug 11, 2007.

  1. Gee

    Gee Guest

    I have a SBS 2003 server running ISA server. The external address to the
    server is like smtp.server.com. My internal DNS is like server.local (AD).
    Smtp.server.com which is a A record located on an external DNS server. I
    need to have the local server resolve smtp.server.com to the local server
    rather than the external IP address.

    Is the best way to do this to create a new primary zone on the internal DNS
    server for smtp.server.com? This certainly works but appears to cause a few
    other issues such as VPN not working correctly (You can connect but not
    connect to resources). The other thing I thought of was to create a primary
    to just
    server.com and then create an A for smtp. Does the same thing from what I
    can see but then I need to add other records for other A records I still
    want to resolve externally.
    Gee, Aug 11, 2007
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  2. Gee

    Anthony Guest

    Essentially you want the mail server to have an internal address as well as
    an external, so internal clients go direct to it rather than out over the
    internet and back. So you need to set up a server.com zone on your internal
    DNS, and add a record for smtp.server.com with the internal address of the
    Because you now have an internal zone for server.com, you need to provide a
    record for any host in that zone, because internal requests for that zone
    will no longer be forwarded to an external DNS.
    Hope that helps,
    Anthony -
    Anthony, Aug 11, 2007
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