IIS Agent

The IIS Agent monitors Microsoft Internet Information Services webservers. Depending on which agent platform you use, its architecture and functionality may differ. Find the detailed information below.

See Configure IIS Agent to learn how to configure the Agent.


The IIS Agents consists of two parts:

  • The IIS Agent Server Module (slave) is the module that is loaded by the web server. It gathers the information that is used for analysis on the AppMon Server.
  • The Web Server Master Agent is a separate process that collects data of all worker processes (slaves). It handles communication with the Collector and retrieves configuration data among other functions. See Web Server Maser Agent configuration to learn how to configure this master agent.


The IIS Agent communicates with the Master Agent through these channels:

  • A shared memory segment propagates configuration data, received from the Collector by the Master Agent, to the worker processes and to hold other information that must be shared across all worker processes. The shared memory segment is backed by a file in <DT_HOME>/agent/conf on all platforms where the worker processes and the Agent process must have read/write access.
  • The IIS Agents (slaves) send collected data to the Master Agent through a stateless UDP connection. The Master Agent collects the data, transforms it, and forwards it to the Collector (standalone or Server-embedded).


Sensor Classic Agent AppMon Agent
Webserver sensor Yes Yes
User Experience sensor Yes Yes