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Exchange 2000 synchronization with Outlook over VPN

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  • Exchange 2000 synchronization with Outlook over VPN

    Our VPN topology has changed from using a home-type router (linksys) to a proper linux-based solution. The implementation required changing the internal IP address of the Windows 2000 server/Exchange 2000 server from to, and opening up a number of ports to allow VPN and OWA. when we are in the office (laptop), we can synchronize fine (fixed IP address), but from home, we can establish VPN, work in folders, use Web Access Outlook, but cannot find the exchange server to synchronize. Open ports on the firewall are: 25, 53, 68, 80, 88, 110, 135, 137, 143, 389, 443, 465, 636, 993, 995 and 3268. This setup worked with the Linksys, which makes us suspect that there's a DNS or DHCP setting in the server that needs to be corrected. Thanks in advance for your help

  • #2
    Re: Exchange 2000 synchronization with Outlook over VPN

    If you have connected the VPN successfully, you shouldn't need to have the ports open.
    Make sure the 53, 68, 135, 137, 143, 389. well all the rest are closed from "Untrusted" to "Trusted" or Red to Green (smoothwall).
    If you have your VPN set up then you would require some of the those ports open ie 1723, 443, 500.
    The VPN should be moving the data throught the Firewall to the tunnel termination point then finding the machines.

    The definition you have given above indicates that you just "opened the firewall" up, not created a tunnel.
    Only 80 and/or 443 are required for OWA.

    If you haven't got this resolved post more where you are at currently at.