Cisco tacacs question

techlinden asked

on 2017-03-30

6 Comments

1 Solution

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Last Modified: 2017-04-03

I'm configuring a router with our acs. It's working fine but the fallback method is giving me a login as prompt. I'm using the line password as fallback. to test fallback i remove the ip address of the acs and it does work. but i still get a login as prompt and i can basically put in anything as the username and use the password on the vty line and get in. i would like to not see the login as prompt and just get a prompt for the password. i'm probably missing something real simple.

aaa authentication login default group tacacs+ line

line vty 0 4
exec-timeout 15 0
privilege level 15
password 7 141419031E11267836
transport input ssh
line vty 5 15
exec-timeout 15 0
privilege level 15
password 7 141419031E11267836

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Harold BowlinOwner/Network Architect

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Commented: 2017-03-30

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techlinden

Author

Commented: 2017-03-30

thanks for the heads up about the pw. didn't use any main pws.....also not internet facing. how would i change the AAA authentication so only the line password is asked for instead of the username in the case of a failover?

techlinden

Author

Commented: 2017-03-30

what's a little weird is that other devices that are on tacacs before i got here have the same config. I'm just adding some new devices to acs and using the config that's in the other devices. the other devices when they've lost contact with acs have only prompted for the password that's configured on the vty line and not the username.

aaa authentication login default group tacacs+ line
aaa authentication enable default group tacacs+ enable
aaa authorization exec default group tacacs+ none
aaa accounting exec default start-stop group tacacs+
aaa accounting commands 15 default start-stop group tacacs+

Harold BowlinOwner/Network Architect

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Commented: 2017-03-30

Correct, when they have lost contact however, have you tried it by removing the IP of the tacacs server?

techlinden

Author

Commented: 2017-03-30

yeah, just tried that. what's weird if i lab it in gsn3 it works fine. i just get the password prompt. maybe the router just needs to be rebooted. I'll also try adding another router to acs and see if the results are the same.

techlinden

Author

Commented: 2017-04-03

I figured it out. apparently ssh doesn't allow logging in via just a password prompt. going to change to failback local instead of line.

Cisco tacacs question

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