Why do I receive an error message when not being able to connect?

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GPO Cataloging

Tuesday, 04 March 2008
You may be experiencing firewall problems with your computer. Check with your network administrator whether relevant ports (i.e. CGP Z39.50 server port #9991, and/or whatever Z39_gate port you use to access the GPO Z39.50 server) need to be opened to enable connection.
Last Updated ( Wednesday, 05 March 2008 )

Catalog of U.S. Government Publications (CGP)