Zte ZXR10 5250-52TC - Figure 5-20 Using PAP Mode for Identity Authentication

ZXR105250SeriesCongurationGuide
TheEAPprotocolisusedbetweentheswitchandthesubscriber.Threetypesofidentity
authenticationmethodsareprovidedbetweentheRADIUSservers:PAP ,CHAP ,and
EAP-MD5.Anyofthemethodscanbeusedaccordingtodifferentserviceoperation
requirements.
lPasswordAuthenticationProtocol(PAP)
PAPisasimpleplaintextauthenticationmode.NASrequiresthesubscriberto
providetheusernameandpasswordandthesubscriberreturnsthesubscriber
informationintheformofplaintext.Theservercheckswhetherthissubscriber
isavailableandwhetherthepasswordiscorrectaccordingtothesubscriber
congurationandreturnsdifferentresponses.Thisauthenticationmodefeatures
poorsecurityandtheusernameandpasswordtransferredmaybeeasilystolen.
FortheprocessofusingthePAPmodeforidentityauthentication,seeFigure5-20.
Figure5-20UsingPAPModeforIdentityAuthentication
lChallengeHandshakeAuthenticationProtocol(CHAP)
CHAPisanencryptedauthenticationmodeandavoidsthetransmissionoftheuser’s
realpassworduponconnectionsetup.NASsendsarandomlygeneratedChallenge
stringtotheuser.TheuserencryptstheChallengestringbyusingtheuser’s
passwordandMD5algorithmandreturnstheusernameandencryptedChallenge
string(encryptedpassword).
TheserverusestheuserpassworditstoresandtheMD5algorithmtoencryptthe
Challengestring.ThenitcomparesthisChallengestringwiththeencryptedpassword
oftheserverandreturnsaresponseaccordingly.
FortheprocessofusingtheCHAPmodeforidentityauthentication,seeFigure5-21.
5-72
SJ-20131111172707-002|2013-11-27(R1.0)ZTEProprietaryandCondential