This document examines common debugging problems for RADIUS when using Password Authentication Protocol (PAP) or Challenge Handshake Authentication Protocol (CHAP). Common PC settings for Microsoft Windows 95, Windows NT, Windows 98, and Windows 2000 are provided, as well as examples of configurations and examples of good and bad debugs.
For more information on document conventions, see the Cisco Technical Tips Conventions.
There are no specific prerequisites for this document.
The information in this document is based on Cisco IOS® Software Releases 11.2 and later.
The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If you are working in a live network, ensure that you understand the potential impact of any command before using it.
Follow the instructions provided below:
In the Dialup Networking window, select the connection name, then File > Properties.
On the Server Type tab, see if the Require Encrypted Password box beneath Type of Dial-up Server is checked.
If this box is checked, it means the PC accepts only CHAP authentication.
If this box is not checked, it means the PC accepts PAP or CHAP authentication.
Follow the instructions provided below:
In the Dial-Up Networking window, select the connection name, and then select File > Properties.
Check the settings on the Security tab:
If the Accept any authentication including clear text box is checked, this means the PC accepts PAP or CHAP.
If the Accept only encrypted authentication box is checked, the PC accepts only CHAP authentication.
Follow the instructions provided below:
In the Dial-Up Networking window, select the connection name, and then select Properties.
On the Server Types tab, check the settings in the Advanced Options area:
If the Require encrypted password box is unchecked, this means the PC accepts PAP or CHAP authentication.
If the Require encrypted password box is checked, this means the PC accepts only CHAP authentication.
Follow the instructions provided below:
In Network and Dial-Up Connections, select the connection name, and then select Properties.
On the Security tab, check the settings in the Advanced > Settings > Allow these protocols area:
If the Unencrypted password (PAP) box is checked, the PC accepts PAP.
If the Challenge Handshake Authentication Protocol (CHAP) box is checked, the PC accepts CHAP per RFC 1994.
If the Microsoft CHAP (MS-CHAP) box is checked, the PC accepts MS-CHAP version 1 and does not accept CHAP per RFC 1994.
Configuration - RADIUS and PAP |
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Current configuration: ! version 11.2 service timestamps debug uptime no service password-encryption service udp-small-servers service tcp-small-servers ! hostname rtpkrb ! aaa new-model ! !--- The following four command lines are specific to !--- Cisco IOS 11.2 and later, up until 11.3.3.T. !--- See below this configuration for commands !--- for other Cisco IOS releases. ! aaa authentication login default radius local aaa authentication ppp default if-needed radius local aaa authorization exec radius if-authenticated aaa authorization network radius if-authenticated ! enable secret 5 $1$pkX.$JdAySRE1SbdbDe7bj0wyt0 enable password ww ! username john password 0 doe username cse password 0 csecse ip host rtpkrb 10.31.1.5 ip domain-name RTP.CISCO.COM ip name-server 171.68.118.103 ! interface Loopback0 ip address 1.1.1.1 255.255.255.0 ! interface Ethernet0 ip address 10.31.1.5 255.255.0.0 no mop enabled ! interface Serial0 no ip address no ip mroute-cache shutdown ! interface Serial1 no ip address shutdown ! interface Async1 ip unnumbered Ethernet0 encapsulation ppp async mode dedicated peer default ip address pool async no cdp enable ppp authentication pap ! ip local pool async 15.15.15.15 ip classless ip route 0.0.0.0 0.0.0.0 10.31.1.1 ! snmp-server community public RW snmp-server host 171.68.118.100 traps public radius-server host 171.68.118.101 auth-port 1645 acct-port 1646 radius-server key cisco ! line con 0 line 1 session-timeout 20 exec-timeout 20 0 password ww autoselect during-login autoselect ppp modem InOut transport input all stopbits 1 speed 38400 flowcontrol hardware line 2 modem InOut speed 38400 flowcontrol hardware line 3 16 line aux 0 line vty 0 4 exec-timeout 0 0 password ww ! end |
Note: To use these commands, remove the highlighted commands from the above configuration and paste these commands in, as dictated by your Cisco IOS release.
aaa authen login default radius local aaa authen ppp default if-needed radius local aaa authorization exec default radius if-authenticated aaa authorization network default radius if-authenticated
aaa authen login default group radius local aaa authen ppp default if-needed group radius local aaa authorization exec default group radius if-authenticated aaa authorization network default group radius if-authenticated
Note: In the debug output, the bold text highlights problems in the debug. Plain text indicates a good debug.
rtpkrb# rtpkrb#sho deb General OS: AAA Authentication debugging is on AAA Authorization debugging is on PPP: PPP authentication debugging is on PPP protocol negotiation debugging is on Radius protocol debugging is on rtpkrb# 4d02h: As1 LCP: I CONFREQ [Closed] id 0 len 20 4d02h: As1 LCP: ACCM 0x00000000 (0x020600000000) 4d02h: As1 LCP: MagicNumber 0x00001F67 (0x050600001F67) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: Lower layer not up, discarding packet %LINK-3-UPDOWN: Interface Async1, changed state to up 4d02h: As1 PPP: Treating connection as a dedicated line 4d02h: As1 PPP: Phase is ESTABLISHING, Active Open 4d02h: As1 LCP: O CONFREQ [Closed] id 85 len 24 4d02h: As1 LCP: ACCM 0x000A0000 (0x0206000A0000) 4d02h: As1 LCP: AuthProto PAP (0x0304C023) 4d02h: As1 LCP: MagicNumber 0xF54252D5 (0x0506F54252D5) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) PC insists on doing chap ('accept encrypted authentication only'), but router is set up for pap: As1 LCP: I CONFNAK [REQsent] id 98 len 12 As1 LCP: AuthProto 0xC123 (0x0308C12301000001) As1 LCP: O CONFREQ [REQsent] id 99 len 24 As1 LCP: ACCM 0x000A0000 (0x0206000A0000) As1 LCP: AuthProto PAP (0x0304C023) As1 LCP: MagicNumber 0xF54D1AF8 (0x0506F54D1AF8) As1 LCP: PFC (0x0702) As1 LCP: ACFC (0x0802) As1 LCP: I CONFREJ [REQsent] id 99 len 8 As1 LCP: AuthProto PAP (0x0304C023) As1 PPP: Closing connection because remote won't authenticate 4d02h: As1 LCP: I CONFACK [REQsent] id 85 len 24 4d02h: As1 LCP: ACCM 0x000A0000 (0x0206000A0000) 4d02h: As1 LCP: AuthProto PAP (0x0304C023) 4d02h: As1 LCP: MagicNumber 0xF54252D5 (0x0506F54252D5) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: I CONFREQ [ACKrcvd] id 0 len 20 4d02h: As1 LCP: ACCM 0x00000000 (0x020600000000) 4d02h: As1 LCP: MagicNumber 0x00001F67 (0x050600001F67) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: O CONFACK [ACKrcvd] id 0 len 20 4d02h: As1 LCP: ACCM 0x00000000 (0x020600000000) 4d02h: As1 LCP: MagicNumber 0x00001F67 (0x050600001F67) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: State is Open 4d02h: As1 PPP: Phase is AUTHENTICATING, by this end 4d02h: As1 PAP: I AUTH-REQ id 14 len 19 from "ddunlap" 4d02h: As1 PAP: Authenticating peer ddunlap 4d02h: AAA/AUTHEN: create_user (0x15AD58) user='ddunlap' ruser='' port='Async1' rem_addr='async' authen_type=PAP service=PPP priv=1 4d02h: AAA/AUTHEN/START (1953436918): port='Async1' list='' action=LOGIN service=PPP 4d02h: AAA/AUTHEN/START (1953436918): using "default" list 4d02h: AAA/AUTHEN (1953436918): status = UNKNOWN 4d02h: AAA/AUTHEN/START (1953436918): Method=RADIUS 4d02h: RADIUS: Initial Transmit id 7 171.68.118.101:1645, Access-Request, len 77 4d02h: Attribute 4 6 0A1F0105 4d02h: Attribute 5 6 00000001 4d02h: Attribute 61 6 00000000 4d02h: Attribute 1 9 6464756E 4d02h: Attribute 2 18 7882E0A5 4d02h: Attribute 6 6 00000002 4d02h: Attribute 7 6 00000001 Radius server is down - produces ERROR - since user is not in local database, failover to local FAILs As1 PAP: I AUTH-REQ id 16 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=16 already in progress As1 PAP: I AUTH-REQ id 17 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=17 already in progress RADIUS: Retransmit id 9 As1 PAP: I AUTH-REQ id 18 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=18 already in progress As1 PAP: I AUTH-REQ id 19 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=19 already in progress As1 PAP: I AUTH-REQ id 20 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=20 already in progress RADIUS: Retransmit id 9 As1 PAP: I AUTH-REQ id 21 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=21 already in progress As1 PAP: I AUTH-REQ id 22 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=22 already in progress RADIUS: Retransmit id 9 As1 PAP: I AUTH-REQ id 23 len 19 from "ddunlap" As1 AUTH: Duplicate authentication request id=23 already in progress As1 LCP: I TERMREQ [Open] id 1 len 8 (0x000002CE) As1 LCP: O TERMACK [Open] id 1 len 4 As1 PPP: Phase is TERMINATING RADIUS: No response for id 9 %RADIUS-3-ALLDEADSERVER: No active radius servers found. Id 9. RADIUS: No response from server AAA/AUTHEN (3025998849): status = ERROR AAA/AUTHEN/START (3025998849): Method=LOCAL AAA/AUTHEN (3025998849): status = FAIL Key in router does not match that of server: RADIUS: Received from id 21 171.68.118.101:1645, Access-Reject, len 20 RADIUS: Reply for 21 fails decrypt NT client sends 'DOMAIN\user' and Radius server expects 'user': RADIUS: Received from id 11 171.68.118.101:1645, Access-Reject, len 20 AAA/AUTHEN (1406749115): status = FAIL As1 PAP: O AUTH-NAK id 25 len 32 msg is "Password validation failure" As1 PPP: Phase is TERMINATING As1 LCP: O TERMREQ [Open] id 108 len 4 AAA/AUTHEN: free_user (0xDA520) user='CISCO\ddunlap' ruser='' port='Async1' rem_addr='async' authen_type=PAP service=PPP priv=1 Radius server refuses user because user user enters bad password, or both userid & password are bad: RADIUS: Received from id 12 171.68.118.101:1645, Access-Reject, len 20 AAA/AUTHEN (733718529): status = FAIL As1 PAP: O AUTH-NAK id 26 len 32 msg is "Password validation failure" As1 PPP: Phase is TERMINATING As1 LCP: O TERMREQ [Open] id 111 len 4 AAA/AUTHEN: free_user (0x15B030) user='ddunlap' ruser='' ='Async1' rem_addr='async' authen_type=PAP service=PPP priv=1 User passes authentication (i.e. username/password is good) but fails authorization (profile not set up for Service-Type=Framed & Framed-Protocol=PPP): RADIUS: Received from id 13 171.68.118.101:1645, Access-Accept, len 20 RADIUS: saved authorization data for user 15AD58 at 15ADF0 AAA/AUTHEN (56862281): status = PASS AAA/AUTHOR/LCP As1: Authorize LCP AAA/AUTHOR/LCP: Async1: (959162008): user='cse' AAA/AUTHOR/LCP: Async1: (959162008): send AV service=ppp AAA/AUTHOR/LCP: Async1: (959162008): send AV protocol=lcp AAA/AUTHOR/LCP: Async1: (959162008): Method=RADIUS RADIUS: no appropriate authorization type for user. AAA/AUTHOR (959162008): Post authorization status = FAIL AAA/AUTHOR/LCP As1: Denied AAA/AUTHEN: free_user (0x15AD58) user='cse' ruser='' port='Async1' rem_addr='async' authen_type=PAP service=PPP priv=1 As1 PAP: O AUTH-NAK id 27 len 25 msg is "Authorization failed" 4d02h: RADIUS: Received from id 7 171.68.118.101:1645, Access-Accept, len 32 4d02h: Attribute 6 6 00000002 4d02h: Attribute 7 6 00000001 4d02h: RADIUS: saved authorization data for user 15AD58 at 16C7F4 4d02h: AAA/AUTHEN (1953436918): status = PASS 4d02h: AAA/AUTHOR/LCP As1: Authorize LCP 4d02h: AAA/AUTHOR/LCP: Async1: (2587233868): user='ddunlap' 4d02h: AAA/AUTHOR/LCP: Async1: (2587233868): send AV service=ppp 4d02h: AAA/AUTHOR/LCP: Async1: (2587233868): send AV protocol=lcp 4d02h: AAA/AUTHOR/LCP: Async1: (2587233868): Method=RADIUS 4d02h: AAA/AUTHOR (2587233868): Post authorization status = PASS_REPL 4d02h: AAA/AUTHOR/LCP As1: Processing AV service=ppp 4d02h: As1 PAP: O AUTH-ACK id 14 len 5 4d02h: As1 PPP: Phase is UP 4d02h: AAA/AUTHOR/FSM As1: (0): Can we start IPCP? 4d02h: AAA/AUTHOR/FSM: Async1: (423372862): user='ddunlap' 4d02h: AAA/AUTHOR/FSM: Async1: (423372862): send AV service=ppp 4d02h: AAA/AUTHOR/FSM: Async1: (423372862): send AV protocol=ip 4d02h: AAA/AUTHOR/FSM: Async1: (423372862): Method=RADIUS 4d02h: AAA/AUTHOR (423372862): Post authorization status = PASS_REPL 4d02h: AAA/AUTHOR/FSM As1: We can start IPCP 4d02h: As1 IPCP: O CONFREQ [Closed] id 17 len 10 4d02h: As1 IPCP: Address 10.31.1.5 (0x03060A1F0105) 4d02h: As1 IPCP: I CONFREQ [REQsent] id 1 len 34 4d02h: As1 IPCP: Address 0.0.0.0 (0x030600000000) 4d02h: As1 IPCP: PrimaryDNS 0.0.0.0 (0x810600000000) 4d02h: As1 IPCP: PrimaryWINS 0.0.0.0 (0x820600000000) 4d02h: As1 IPCP: SecondaryDNS 0.0.0.0 (0x830600000000) 4d02h: As1 IPCP: SecondaryWINS 0.0.0.0 (0x840600000000) 4d02h: AAA/AUTHOR/IPCP As1: Start. Her address 0.0.0.0, we want 0.0.0.0 4d02h: AAA/AUTHOR/IPCP As1: Processing AV service=ppp 4d02h: AAA/AUTHOR/IPCP As1: Authorization succeeded 4d02h: AAA/AUTHOR/IPCP As1: Done. Her address 0.0.0.0, we want 0.0.0.0 4d02h: As1 IPCP: Using pool 'async' 4d02h: As1 IPCP: Pool returned 15.15.15.15 4d02h: As1 IPCP: O CONFREJ [REQsent] id 1 len 22 4d02h: As1 IPCP: PrimaryWINS 0.0.0.0 (0x820600000000) 4d02h: As1 IPCP: SecondaryDNS 0.0.0.0 (0x830600000000) 4d02h: As1 IPCP: SecondaryWINS 0.0.0.0 (0x840600000000) 4d02h: As1 IPCP: I CONFACK [REQsent] id 17 len 10 4d02h: As1 IPCP: Address 10.31.1.5 (0x03060A1F0105) %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up 4d02h: As1 IPCP: I CONFREQ [ACKrcvd] id 2 len 16 4d02h: As1 IPCP: Address 0.0.0.0 (0x030600000000) 4d02h: As1 IPCP: PrimaryDNS 0.0.0.0 (0x810600000000) 4d02h: AAA/AUTHOR/IPCP As1: Start. Her address 0.0.0.0, we want 15.15.15.15 4d02h: AAA/AUTHOR/IPCP As1: Processing AV service=ppp 4d02h: AAA/AUTHOR/IPCP As1: Authorization succeeded 4d02h: AAA/AUTHOR/IPCP As1: Done. Her address 0.0.0.0, we want 15.15.15.15 4d02h: As1 IPCP: O CONFNAK [ACKrcvd] id 2 len 16 4d02h: As1 IPCP: Address 15.15.15.15 (0x03060F0F0F0F) 4d02h: As1 IPCP: PrimaryDNS 171.68.118.103 (0x8106AB447667) 4d02h: As1 IPCP: I CONFREQ [ACKrcvd] id 3 len 16 4d02h: As1 IPCP: Address 15.15.15.15 (0x03060F0F0F0F) 4d02h: As1 IPCP: PrimaryDNS 171.68.118.103 (0x8106AB447667) 4d02h: AAA/AUTHOR/IPCP As1: Start. Her address 15.15.15.15, we want 15.15.15.15 4d02h: AAA/AUTHOR/IPCP: Async1: (4204275250): user='ddunlap' 4d02h: AAA/AUTHOR/IPCP: Async1: (4204275250): send AV service=ppp 4d02h: AAA/AUTHOR/IPCP: Async1: (4204275250): send AV protocol=ip 4d02h: AAA/AUTHOR/IPCP: Async1: (4204275250): send AV addr*15.15.15.15 4d02h: AAA/AUTHOR/IPCP: Async1: (4204275250): Method=RADIUS 4d02h: AAA/AUTHOR (4204275250): Post authorization status = PASS_REPL 4d02h: AAA/AUTHOR/IPCP As1: Reject 15.15.15.15, using 15.15.15.15 4d02h: AAA/AUTHOR/IPCP As1: Processing AV service=ppp 4d02h: AAA/AUTHOR/IPCP As1: Processing AV addr*15.15.15.15 4d02h: AAA/AUTHOR/IPCP As1: Authorization succeeded 4d02h: AAA/AUTHOR/IPCP As1: Done. Her address 15.15.15.15, we want 15.15.15.15 4d02h: As1 IPCP: O CONFACK [ACKrcvd] id 3 len 16 4d02h: As1 IPCP: Address 15.15.15.15 (0x03060F0F0F0F) 4d02h: As1 IPCP: PrimaryDNS 171.68.118.103 (0x8106AB447667) 4d02h: As1 IPCP: State is Open 4d02h: As1 IPCP: Install route to 15.15.15.15 rtpkrb#
Configuration - RADIUS and CHAP |
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Current configuration: ! version 11.2 service timestamps debug uptime no service password-encryption service udp-small-servers service tcp-small-servers ! hostname rtpkrb ! aaa new-model ! !--- The following four command lines are specific to !--- Cisco IOS 11.2 and later, up until 11.3.3.T. !--- See below this configuration for commands !--- for other Cisco IOS releases. ! aaa authentication login default radius local aaa authentication ppp default if-needed radius local aaa authorization exec radius if-authenticated aaa authorization network radius if-authenticated ! enable secret 5 $1$pkX.$JdAySRE1SbdbDe7bj0wyt0 enable password ww ! username john password 0 doe username cse password 0 csecse ip host rtpkrb 10.31.1.5 ip name-server 171.68.118.103 ! interface Loopback0 ip address 1.1.1.1 255.255.255.0 ! interface Ethernet0 ip address 10.31.1.5 255.255.0.0 no mop enabled ! interface Serial0 no ip address no ip mroute-cache shutdown ! interface Serial1 no ip address shutdown ! interface Async1 ip unnumbered Ethernet0 encapsulation ppp async mode dedicated peer default ip address pool async no cdp enable ppp authentication chap ! ip local pool async 15.15.15.15 ip classless ip route 0.0.0.0 0.0.0.0 10.31.1.1 ! snmp-server community public RW snmp-server host 171.68.118.100 traps public radius-server host 171.68.118.101 auth-port 1645 acct-port 1646 radius-server key cisco ! line con 0 line 1 session-timeout 20 exec-timeout 20 0 password ww autoselect during-login autoselect ppp modem InOut transport input all stopbits 1 speed 38400 flowcontrol hardware line 2 modem InOut speed 38400 flowcontrol hardware line 3 16 line aux 0 line vty 0 4 exec-timeout 0 0 password ww ! end |
Note: To use these commands, remove the highlighted commands from the above configuration and paste these commands in, as dictated by your Cisco IOS release.
aaa authen login default radius local aaa authen ppp default if-needed radius local aaa authorization exec default radius if-authenticated aaa authorization network default radius if-authenticated
aaa authen login default group radius local aaa authen ppp default if-needed group radius local aaa authorization exec default group radius if-authenticated aaa authorization network default group radius if-authenticated
Note: In the debug output, the bold, italicized text highlights problems in the debug. Plain text indicates a good debug.
rtpkrb#show debug General OS: AAA Authentication debugging is on AAA Authorization debugging is on PPP: PPP authentication debugging is on PPP protocol negotiation debugging is on Radius protocol debugging is on rtpkrb# 4d02h: As1 LCP: I CONFREQ [Closed] id 0 len 20 4d02h: As1 LCP: ACCM 0x00000000 (0x020600000000) 4d02h: As1 LCP: MagicNumber 0x0000405F (0x05060000405F) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: Lower layer not up, discarding packet %LINK-3-UPDOWN: Interface Async1, changed state to up 4d02h: As1 PPP: Treating connection as a dedicated line 4d02h: As1 PPP: Phase is ESTABLISHING, Active Open 4d02h: As1 LCP: O CONFREQ [Closed] id 87 len 25 4d02h: As1 LCP: ACCM 0x000A0000 (0x0206000A0000) 4d02h: As1 LCP: AuthProto CHAP (0x0305C22305) 4d02h: As1 LCP: MagicNumber 0xF5445B55 (0x0506F5445B55) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: I CONFACK [REQsent] id 87 len 25 4d02h: As1 LCP: ACCM 0x000A0000 (0x0206000A0000) 4d02h: As1 LCP: AuthProto CHAP (0x0305C22305) 4d02h: As1 LCP: MagicNumber 0xF5445B55 (0x0506F5445B55) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: I CONFREQ [ACKrcvd] id 0 len 20 4d02h: As1 LCP: ACCM 0x00000000 (0x020600000000) 4d02h: As1 LCP: MagicNumber 0x0000405F (0x05060000405F) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: O CONFACK [ACKrcvd] id 0 len 20 4d02h: As1 LCP: ACCM 0x00000000 (0x020600000000) 4d02h: As1 LCP: MagicNumber 0x0000405F (0x05060000405F) 4d02h: As1 LCP: PFC (0x0702) 4d02h: As1 LCP: ACFC (0x0802) 4d02h: As1 LCP: State is Open 4d02h: As1 PPP: Phase is AUTHENTICATING, by this end 4d02h: As1 CHAP: O CHALLENGE id 11 len 27 from "rtpkrb" 4d02h: As1 CHAP: I RESPONSE id 11 len 28 from "chapadd" 4d02h: AAA/AUTHEN: create_user (0x15AD58) user='chapadd' ruser='' port='Async1' rem_addr='async' authen_type=CHAP service=PPP priv=1 4d02h: AAA/AUTHEN/START (575703226): port='Async1' list='' action=LOGIN service=PPP 4d02h: AAA/AUTHEN/START (575703226): using "default" list 4d02h: AAA/AUTHEN (575703226): status = UNKNOWN 4d02h: AAA/AUTHEN/START (575703226): Method=RADIUS 4d02h: RADIUS: Initial Transmit id 8 171.68.118.101:1645, Access-Request, len 78 4d02h: Attribute 4 6 0A1F0105 4d02h: Attribute 5 6 00000001 4d02h: Attribute 61 6 00000000 4d02h: Attribute 1 9 63686170 4d02h: Attribute 3 19 0B895D57 4d02h: Attribute 6 6 00000002 4d02h: Attribute 7 6 00000001 Radius server is down - produces ERROR - since user is not in local database, failover to local FAILs: As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress RADIUS: Retransmit id 15 As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress RADIUS: Retransmit id 15 As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress RADIUS: Retransmit id 15 As1 CHAP: I RESPONSE id 12 len 28 from "chapadd" As1 AUTH: Duplicate authentication request id=12 already in progress As1 LCP: I TERMREQ [Open] id 1 len 8 (0x000002CE) As1 LCP: O TERMACK [Open] id 1 len 4 As1 PPP: Phase is TERMINATING RADIUS: id 15, requester hung up. RADIUS: No response for id 15 RADIUS: No response from server AAA/AUTHEN (1866705040): status = ERROR AAA/AUTHEN/START (1866705040): Method=LOCAL AAA/AUTHEN (1866705040): status = FAIL As1 CHAP: Unable to validate Response. Username chapadd: Authentication failure As1 CHAP: O FAILURE id 12 len 26 msg is "Authentication failure" AAA/AUTHEN: free_user (0x1716B8) user='chapadd' ruser='' port='Async1' rem_addr='async' authen_type=CHAP service=PPP priv=1 Key in router does not match that of server: RADIUS: Received from id 21 171.68.118.101:1645, Access-Reject, len 20 RADIUS: Reply for 21 fails decrypt NT client sends 'DOMAIN\user' and Radius server expects 'user': RADIUS: Received from id 16 171.68.118.101:1645, Access-Reject, len 20 AAA/AUTHEN (2974782384): status = FAIL As1 CHAP: Unable to validate Response. Username CISCO\chapadd: Authentication failure As1 CHAP: O FAILURE id 13 len 26 msg is "Authentication failure" As1 PPP: Phase is TERMINATING As1 LCP: O TERMREQ [Open] id 131 len 4 AAA/AUTHEN: free_user (0x171700) user='CISCO\chapadd' ruser='' port='Async1' rem_addr='async' authen_type=CHAP service=PPP priv=1 Radius server refuses user because user is set up for pap, user enters bad password, or both userid & password are bad: RADIUS: Received from id 17 171.68.118.101:1645, Access-Reject, len 20 AAA/AUTHEN (3898168391): status = FAIL As1 CHAP: Unable to validate Response. Username ddunlap: Authentication failure As1 CHAP: O FAILURE id 14 len 26 msg is "Authentication failure" As1 PPP: Phase is TERMINATING As1 LCP: O TERMREQ [Open] id 134 len 4 AAA/AUTHEN: free_user (0x1716B8) user='ddunlap' ruser='' port='Async1' rem_addr='async' authen_type=CHAP service=PPP priv=1 User PASSes authentication (i.e. username/password is good) but FAILs authorization (profile not set up for Service-Type=Framed & Framed-Protocol=PPP): RADIUS: Received from id 19 171.68.118.101:1645, Access-Accept, len 20 AAA/AUTHEN (2006894701): status = PASS AAA/AUTHOR/LCP As1: Authorize LCP AAA/AUTHOR/LCP: Async1: (2370106832): user='noauth' AAA/AUTHOR/LCP: Async1: (2370106832): send AV service=ppp AAA/AUTHOR/LCP: Async1: (2370106832): send AV protocol=lcp AAA/AUTHOR/LCP: Async1: (2370106832): Method=RADIUS RADIUS: no appropriate authorization type for user. AAA/AUTHOR (2370106832): Post authorization status = FAIL AAA/AUTHOR/LCP As1: Denied 4d02h: RADIUS: Received from id 8 171.68.118.101:1645, Access-Accept, len 32 4d02h: Attribute 6 6 00000002 4d02h: Attribute 7 6 00000001 4d02h: AAA/AUTHEN (575703226): status = PASS 4d02h: AAA/AUTHOR/LCP As1: Authorize LCP 4d02h: AAA/AUTHOR/LCP: Async1: (4143416222): user='chapadd' 4d02h: AAA/AUTHOR/LCP: Async1: (4143416222): send AV service=ppp 4d02h: AAA/AUTHOR/LCP: Async1: (4143416222): send AV protocol=lcp 4d02h: AAA/AUTHOR/LCP: Async1: (4143416222): Method=RADIUS 4d02h: AAA/AUTHOR (4143416222): Post authorization status = PASS_REPL 4d02h: AAA/AUTHOR/LCP As1: Processing AV service=ppp 4d02h: As1 CHAP: O SUCCESS id 11 len 4 4d02h: As1 PPP: Phase is UP 4d02h: AAA/AUTHOR/FSM As1: (0): Can we start IPCP? 4d02h: AAA/AUTHOR/FSM: Async1: (1916451991): user='chapadd' 4d02h: AAA/AUTHOR/FSM: Async1: (1916451991): send AV service=ppp 4d02h: AAA/AUTHOR/FSM: Async1: (1916451991): send AV protocol=ip 4d02h: AAA/AUTHOR/FSM: Async1: (1916451991): Method=RADIUS 4d02h: AAA/AUTHOR (1916451991): Post authorization status = PASS_REPL 4d02h: AAA/AUTHOR/FSM As1: We can start IPCP 4d02h: As1 IPCP: O CONFREQ [Closed] id 19 len 10 4d02h: As1 IPCP: Address 10.31.1.5 (0x03060A1F0105) 4d02h: As1 IPCP: I CONFREQ [REQsent] id 1 len 34 4d02h: As1 IPCP: Address 0.0.0.0 (0x030600000000) 4d02h: As1 IPCP: PrimaryDNS 0.0.0.0 (0x810600000000) 4d02h: As1 IPCP: PrimaryWINS 0.0.0.0 (0x820600000000) 4d02h: As1 IPCP: SecondaryDNS 0.0.0.0 (0x830600000000) 4d02h: As1 IPCP: SecondaryWINS 0.0.0.0 (0x840600000000) 4d02h: AAA/AUTHOR/IPCP As1: Start. Her address 0.0.0.0, we want 0.0.0.0 4d02h: AAA/AUTHOR/IPCP As1: Processing AV service=ppp 4d02h: AAA/AUTHOR/IPCP As1: Authorization succeeded 4d02h: AAA/AUTHOR/IPCP As1: Done. Her address 0.0.0.0, we want 0.0.0.0 4d02h: As1 IPCP: Using pool 'async' 4d02h: As1 IPCP: Pool returned 15.15.15.15 4d02h: As1 IPCP: O CONFREJ [REQsent] id 1 len 22 4d02h: As1 IPCP: PrimaryWINS 0.0.0.0 (0x820600000000) 4d02h: As1 IPCP: SecondaryDNS 0.0.0.0 (0x830600000000) 4d02h: As1 IPCP: SecondaryWINS 0.0.0.0 (0x840600000000) 4d02h: As1 IPCP: I CONFACK [REQsent] id 19 len 10 4d02h: As1 IPCP: Address 10.31.1.5 (0x03060A1F0105) 4d02h: As1 IPCP: I CONFREQ [ACKrcvd] id 2 len 16 4d02h: As1 IPCP: Address 0.0.0.0 (0x030600000000) 4d02h: As1 IPCP: PrimaryDNS 0.0.0.0 (0x810600000000) 4d02h: AAA/AUTHOR/IPCP As1: Start. Her address 0.0.0.0, we want 15.15.15.15 4d02h: AAA/AUTHOR/IPCP As1: Processing AV service=ppp 4d02h: AAA/AUTHOR/IPCP As1: Authorization succeeded 4d02h: AAA/AUTHOR/IPCP As1: Done. Her address 0.0.0.0, we want 15.15.15.15 4d02h: As1 IPCP: O CONFNAK [ACKrcvd] id 2 len 16 4d02h: As1 IPCP: Address 15.15.15.15 (0x03060F0F0F0F) 4d02h: As1 IPCP: PrimaryDNS 171.68.118.103 (0x8106AB447667) 4d02h: As1 IPCP: I CONFREQ [ACKrcvd] id 3 len 16 4d02h: As1 IPCP: Address 15.15.15.15 (0x03060F0F0F0F) 4d02h: As1 IPCP: PrimaryDNS 171.68.118.103 (0x8106AB447667) 4d02h: AAA/AUTHOR/IPCP As1: Start. Her address 15.15.15.15, we want 15.15.15.15 4d02h: AAA/AUTHOR/IPCP: Async1: (1096193147): user='chapadd' 4d02h: AAA/AUTHOR/IPCP: Async1: (1096193147): send AV service=ppp 4d02h: AAA/AUTHOR/IPCP: Async1: (1096193147): send AV protocol=ip 4d02h: AAA/AUTHOR/IPCP: Async1: (1096193147): send AV addr*15.15.15.15 4d02h: AAA/AUTHOR/IPCP: Async1: (1096193147): Method=RADIUS 4d02h: AAA/AUTHOR (1096193147): Post authorization status = PASS_REPL 4d02h: AAA/AUTHOR/IPCP As1: Reject 15.15.15.15, using 15.15.15.15 4d02h: AAA/AUTHOR/IPCP As1: Processing AV service=ppp 4d02h: AAA/AUTHOR/IPCP As1: Processing AV addr*15.15.15.15 4d02h: AAA/AUTHOR/IPCP As1: Authorization succeeded 4d02h: AAA/AUTHOR/IPCP As1: Done. Her address 15.15.15.15, we want 15.15.15.15 4d02h: As1 IPCP: O CONFACK [ACKrcvd] id 3 len 16 4d02h: As1 IPCP: Address 15.15.15.15 (0x03060F0F0F0F) 4d02h: As1 IPCP: PrimaryDNS 171.68.118.103 (0x8106AB447667) 4d02h: As1 IPCP: State is Open %LINEPROTO-5-UPDOWN: Line protocol on Interface Async1, changed state to up 4d02h: As1 IPCP: Install route to 15.15.15.15 rtpkrb#
The following debug commands were used to produce the sample debug output in this document.
Note: Before issuing debug commands, please see Important Information on Debug Commands.
debug aaa authentication - Display information on AAA authentication.
debug aaa authorization - Display information on AAA authorization.
debug radius - Display detailed debugging information associated with the Remote Authentication Dial-In User Server (RADIUS).
debug ppp negotiation - Displays PPP packets transmitted during PPP startup, where PPP options are negotiated.
Revision | Publish Date | Comments |
---|---|---|
1.0 |
19-Jan-2006 |
Initial Release |