MS-MPPE keys in proxy

[M Arif]

Hi,
I am having trouble understanding the EAP-TLS authentication when requests
are proxied.
I want to know how MS-MPPE-Send-Key and MS-MPPE-Recv-Keys are transferred
in proxy.. since these keys contain values calculated with EAP-Messages
exchanged hashed with shared secret bla bla. Does the proxy keep its own
EAP state and varialbe and calculates the Message Authenticator. or
free-radius ignores these keys when exchanging EAP messages.

regards
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