The BIS_TRACE_SUFFIX Environment Variable

On BIS/IIS, the BIS_TRACE_SUFFIX environment variable and, on BIS/Apache, the BISTraceSuffix configuration parameter allows trace parameters to be injected into every trace statement. While this requires administrative access to the web server, this is useful for globally providing specific clients access to trace information.

For example, if your trace statements look like this:

{{ trace(page, noip) }}

and you wish to view trace data from the machine at, and control such tracing with the MySecretTrace query parameter, place this into the server environment: