At 18:54 27/02/00 -0500, you wrote:
>At 10:43 PM 2/27/00 +0000, James Lewis wrote:
>
>>I have 3 NT workstations on an internal LAN, going through ipmasq (on 
>>2.2.13) which is providing NAT. General services such as web browsing, 
>>FTP etc, are working fine but we are experiencing very annoying problems 
>>with Microsoft Outlook 2000 (running in 'Corporate Workgroup mode) 
>>running on the 'Internal' machines connecting to an External Exchange 
>>server with a public IP.
>>
>>The problems seem to be because the exchange server is seeing requests 
>>from 3 different machines coming from the single IP address of the NAT 
>>machine (the problems more or less go away when there is only one machine 
>>running internally). The same problem is arising with Visual Interdev 
>>running internally, connecting to an external SQL server.
>>
>>Anyone had the same problem? Is there a way around it, that doesn't 
>>involve moving the exchange server to the Internal LAN?
>
>This is peculiar.  I have a client who is doing the same thing (well, the 
>NAT is being done by a cisco router between internal and external LANs), 
>and they have no problems getting to the exchange server.  Can you be more 
>specific about what the problems are?
>

The Outlook clients, and the Interdev Clients work for a few minutes, then 
report constant time outs, or 'Network Unavailable' type errors - (however 
other utils such as Internet explorer carry on working fine). Outlook 
starts working again after a few retries, and Interdev must be closed and 
reopened before it works again.

It seems like ports are being held open, or not closed properly or 
something like that - although thats just a random uneducated guess.

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