Hi Ajay,
For external S-Tap you should just make sure the machine where you install this agent has enough compute to handle your db connections/load.
Also, you must be aware that External S-Tap works as a middleware between enduser/Application and Database so you have to update your connection string so everything goes through this agent and not directly to DB.
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Regards,
Rizwan Ali
Senior Guardium Consultant
Pakistan
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