>принцип помощи блять! спс пупсики((( Не надо оскорблять. Непонятный термин спрашиваете.
man pppd на предмет EAP MD5-Challenge
Pppd stores secrets for use in authentication in secrets files
(/etc/ppp/pap-secrets for PAP, /etc/ppp/chap-secrets for CHAP, MS-CHAP,
MS-CHAPv2, and EAP MD5-Challenge, and /etc/ppp/srp-secrets for EAP
SRP-SHA1). All secrets files have the same format. The secrets files
can contain secrets for pppd to use in authenticating itself to other
systems, as well as secrets for pppd to use when authenticating other
systems to itself.
eap-interval n
If this option is given and pppd authenticates the peer with EAP
(i.e., is the server), pppd will restart EAP authentication
every n seconds. For EAP SRP-SHA1, see also the srp-interval
option, which enables lightweight rechallenge.
eap-max-rreq n
Set the maximum number of EAP Requests to which pppd will
respond (as a client) without hearing EAP Success or Failure.
(Default is 20.)
eap-max-sreq n
Set the maximum number of EAP Requests that pppd will issue (as
a server) while attempting authentication. (Default is 10.)
eap-restart n
Set the retransmit timeout for EAP Requests when acting as a
server (authenticator). (Default is 3 seconds.)
eap-timeout n
опции заносятся в /etc/ppp/options или в аргументы kppp (если ей пользуетесь)