Q: What does the strange value in the qos_source of url_response relate to?

Document ID : KB000098128
Last Modified Date : 25/05/2018
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The url_response probe cfg file show entries for qos_source, in the profile section, which have strange values. What does this pattern signify?
The qos_source = @%&*-@%&* is related to a specific fix that was put into the probe at the 4.11 release which relate to the following from the probe release notes:
4.11 Added fix to Can’t get source field for QoS messages. January 2012

So it is related to handling of QoS Source Override value in a given profile.
If you were to add an override string in one of the probe profiles (via the GUI config) then the cfg entry for qos_source will reflect the string that you entered.
The default string @%&*-@%&* represents a blank line.