Looking Glass Functionality

Greetings
Does anyone know of a off-the-self product that provides looking glass
functionality for a network ?

Many thanks,
-Optimistic

Follow-Ups:
- Looking Glass Functionality
  - From: pixitha.kyle at gmail.com (Kyle Duren)
- Looking Glass Functionality
  - From: eric at opticfusion.net (Eric Stockwell)
- Looking Glass Functionality
  - From: ray at oneunified.net (Raymond Burkholder)
- Looking Glass Functionality
  - From: packetjockey at gmail.com (Rafael Rodriguez)
- Looking Glass Functionality
  - From: ahebert at pubnix.net (Alain Hebert)