Client Receives Error When Resolving Fully Qualified Domain Name

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Article ID: 170316 - View products that this article applies to.
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Attempts to resolve fully qualified domain names (FQDN) for your internal domain fail, resulting in error messages from your applications similar to the following:
Host not found
Bad IP Address <host name>.


The Microsoft Proxy Client may cause this problem if it is incorrectly configured.


Edit the Mspclnt.ini file to add your internal domain suffixes as described in the Microsoft Proxy Client documentation using the LocalDomains entry.

Using a text editor, open the Mspclnt.ini file and add or edit the LocalDomains entry in the [Common] section and set it equal to any domain suffixes that exist on your internal network.

For example:
   LocalDomains =,


The Microsoft Proxy Client will, by default, forward all FQDN name queries to the proxy server on your network. The proxy server then forwards these queries to its DNS server, which is most likely on the Internet. Unless your internal domain name(s) are registered on the Internet, the name resolution for the internal domain name will fail when processed by an external DNS.


Article ID: 170316 - Last Review: February 21, 2014 - Revision: 3.0
  • Microsoft Windows NT Workstation 3.5
  • Microsoft Windows NT Workstation 3.51
  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 3.5
  • Microsoft Windows NT Server 3.51
  • Microsoft Windows NT Server 4.0 Standard Edition
kbnosurvey kbarchive kbinterop kbnetwork kbprb KB170316

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