FIX: An HTTP Send to a Non-Standard HTTP Port Through a Proxy Server Fails (317079)

SYMPTOMS

Documents that are sent from BizTalk Server fail with a transport error if:

The HTTP transport is configured to use a proxy server.

-and-
The HTTP transport is configured to use an address with a non-standard port.

RESOLUTION

To resolve this problem, obtain the latest service pack for Microsoft BizTalk Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

299664 INFO: How to Obtain the Latest BizTalk Server 2000 Service Pack

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft BizTalk Server 2000 Service Pack 2.

CAUSE

The HTTP transport fails to deliver the document under the following conditions:

You configure a messaging port to use a primary transport of HTTP.
You configure the address with a non-standard port other than 80 (such as http://remoteserver:81/test.htm).
You subsequently configure the advanced properties of a channel that is bound to this port to Use HTTP proxy.

In this scenario, you receive an error from the proxy server that states that the connection fails when this Channel/Port combination is used to process documents.