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Proxy and Exchange

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7 replies

by maddiuex

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Hi
Here are the facts.
1. Server=NT4.0 service 6a, exhange server 5, Formatted and reinstalled with no proxy service.
2. Workstations with 98. and outlook 98

Customer use to have a proxy server, and cleints with one modem shared, Now they are on a deticated ISDN, with Sonic Wall. The question is, when the Isdn is down, no one can receive their internal email, There is no external mail. As soon as the Web is back up, the email is normal, and does not lock up. They are using Outlook 98. I have uninstalled Proxy Cleint and looked through the registry for the client and found nothing, But 2 of the machines that has been rebuilt, does not have this problem. I do not want to rebuild 50 machines, or ghost them. Should be a simple answer ( Hope )
Thanks

7 replies

by curlergirl

Does Outlook freeze or is it unable to find the server? It would be helpful to know if there is some sort of error message that appears. If it's a case where Outlook 98 is saying that it is unable to connect to the server, try putting a HOSTS fileon the workstations with the IP address of the Exchange server in it. If you look in the C:\Windows folder on the workstation, you'll see a file called HOSTS.SAM - this is a sample HOSTS file that gives you the format of the command you need in thefile. If you open this file in Notepad, go to the last line and add a line with the IP address and host name of the Exchange Server. Then save the file as HOSTS with NO EXTENSION. See if this helps. Otherwise, if you're getting a different errormessage or other behavior, please post additional info and I'll try to help further. I doubt this has anything to do with the proxy server, though, since Outlook 98 does not have any connection with a proxy server or firewall - it only looks for the IP address or host name of its Exchange Server. Hope this helps!

by jayanth

From your problem statement I assume that you are no longer using the proxy server, but Sonic Wall is doing a NAT for your private IP's, for Internet access.

Now does your ISDN link give you a static IP address? If so, and if in the Outlook Client configuration, you have pointed to the Exchange Server with this static IP, then when the ISDN line goes down, you will be unable to access this IP (This IP forms the External Interface for your NT machine).

Make sure that all your workstationshave their Outlook settings pointing to the private IP (internal interface) of your Exchange Server. Also when the ISDN line goes down, try to ping the Exchange Server to its internal and external interfaces. You may also try a 'telnet 25' to further troubleshoot the problem.

Hope this helps you. If you need any more info, please post it here.

by maddiuex

I will try the lmhostd file, and Outlook just sits there, Not frozen, but at the splash screen.

by maddiuex

I can ping everything on the network, except the Internet. All workstations have a static IP, and are pointing to the correct exchang server, I can open anything on the network, except outlook.

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