Error message v 9.1 - metastorm/metastorm/default.aspx does not exist - reverse proxy rewriting

The following was introduced in 9.0.1.1 (which will be included in 9.0.1.2) and might have an impact:

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Clearing the browser’s temporary files and cookies causes the Web Client to be accessed through the real BPM Web Client address although a reverse proxy is configured to access the Web Client. (Metastorm# SR-03232011-0003, SR-08102011-0004, DEF18521, DEF18381)

        To overcome the issue, new entries ReverseProxyHost, ReverseProxyPort, and ReverseProxyScheme settings have been added to the Web Client’s web.config file:

where:

ReverseProxyHost should specify the reverse proxy URL without the "http://" string preceding the URL.

proxy-url should specify the proxy server URL. 

where:

ReverseProxyPort should specify the reverse proxy port. The port can be left empty or disabled. In this case, the port number will be taken from the request.

proxyport should specify the proxy server port.

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where:

ReverseProxyScheme should specify either HTTP or HTTPS as the value depending on the type of protocol of the proxy server.

proxy-url-schema should specify the reverse proxy URL scheme.

By default these new settings are disabled.