Microsoft KB Archive/196268

= SBS: LAN Clients Lose Connectivity After Dialing into ISP =

Article ID: 196268

Article Last Modified on 11/19/2003

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APPLIES TO


 * Microsoft BackOffice Small Business Server 4.0
 * Microsoft BackOffice Small Business Server 4.0a
 * Microsoft BackOffice Small Business Server 4.5

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This article was previously published under Q196268



SYMPTOMS
When the Small Business Server (SBS) dials through Proxy or Exchange to the ISP, the LAN clients lose IP connectivity to the server. They cannot ping the server, connect to shares, use Outlook, or download Web pages from the Internet. When the server disconnects from the ISP, connectivity returns.



CAUSE
Connectivity on the local network is disrupted while the SBS server is connected to an ISP that gives the server an IP address that is on the same logical subnet as the network card.



RESOLUTION
Make sure that the IP address given by the ISP and the IP address on the SBS server's network card are in different logical subnets.



MORE INFORMATION
Routes will be dynamically added to the server's route table, which would redirect Internet traffic destined for the LAN back out the modem to the ISP.

Additional query words: smallbiz

Keywords: kbnetwork kbprb KB196268

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