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post-auth - After it has been determined what action should be taken, this section takes care of any extra tasks required to be carried out, for example logging, and can also add/modify attributes to be sent back to the NAS as part of the Access-Accept/Access-Reject packet.

Sources

https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol

https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol#PEAP

https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol#EAP_Tunneled_Transport_Layer_Security_(EAP-TTLS)

Support / Knowledge places

Most documentation regarding FreeRADIUS and many modules, and some examples, can be found on the FreeRADIUS wiki:

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