Need to analysis the log of PPP authentication failure.

[syjeon]

Hi there,

I have log which failed to authenticate with other peers when it comes to dialing up with ISDN.

Following is debugging when the authentication failure event occurred between both ISDN routers.

What is the mostly possible cause of authentication failure?

017042: *Oct  6 05:29:24.476 GMT: BR0/2/0:1 LCP: MagicNumber 0x54620738 (0x050654620738)
017043: *Oct  6 05:29:24.476 GMT: BR0/2/0:1 LCP: Event[Receive ConfAck] State[ACKsent to Open]
017044: *Oct  6 05:29:24.500 GMT: BR0/2/0:1 PPP: Phase is AUTHENTICATING, by the peer
017045: *Oct  6 05:29:24.500 GMT: BR0/2/0:1 LCP: State is Open
017046: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 CHAP: I CHALLENGE id 1 len 29 from "mjdmro02" <<< mjdmro02 is peer device hostname?
017047: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 PPP: Sent CHAP SENDAUTH Request
017048: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 PPP: Received SENDAUTH Response FAIL
017049: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 CHAP: Unable to authenticate for peer
017050: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 PPP DISC: User failed CHAP authentication <<< possible cause is wrong password?
017051: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 PPP: Sending AAA radius abort
017052: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 PPP: Sending Acct Event[Down] id[19C]
017053: *Oct  6 05:29:24.540 GMT: PPP: NET STOP send to AAA.
017054: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 LCP: O TERMREQ [Open] id 2 len 4
017055: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 LCP: Event[CLOSE] State[Open to Closing]
017056: *Oct  6 05:29:24.540 GMT: BR0/2/0:1 PPP: Phase is TERMINATING
017057: *Oct  6 05:29:24.580 GMT: BR0/2/0:1 LCP: I TERMACK [Closing] id 2 len 4
017058: *Oct  6 05:29:24.580 GMT: BR0/2/0:1 PPP: No remote authentication for call-out
017059: *Oct  6 05:29:24.580 GMT: BR0/2/0:1 LCP: Event[Receive TermAck] State[Closing to Closed]
017060: *Oct  6 05:29:24.580 GMT: BR0/2/0:1 LCP: Event[DOWN] State[Closed to Initial]
017061: *Oct  6 05:29:24.580 GMT: BR0/2/0:1 PPP: Phase is DOWN
017062: *Oct  6 05:29:24.580 GMT: BR0/2/0:1 DDR: disconnecting call <<< Due to failure of authentication, Router disconnected the call.

[Mark Malone]

Hi

yes that looks like authentication/username and password is setup wrong so its disconnected the attempt due to that

[Richard Burts]

The most likely issue is that the password configured on your router does not match the password configured on the other device. It is also possible that the mismatch involves the ID used to authenticate. It is less likely but still possible that the issue is that your router is using CHAP and the other device is using some different authentication protocol.

HTH

Rick