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Event ID: 16 Source: IAS

Source
Level
Description
A packet with type <type>, which is not valid, was received on port <port> from client <client>.
Comments
 
As per Microsoft: "This event record indicates that the RADIUS port identified in the message received the wrong type of packet. There are two types of ports used by RADIUS—Authentication and Accounting. The packet type must match the port type being used". See MSW2KDB for details.

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