[Freeipa-users] 14: No supported authentication methods available

[Simo Sorce]

On Thu, 2016-02-25 at 14:36 +0000, Terry John wrote:
> This turned out to be a setting in /etc/ssh/sshd_config which gets overridden by ipa-client-install. Needed to un-comment
> 
> PasswordAuthentication yes

This is disabled because we enable ChallengeResponseAuthentication which
is a superset of PasswordAuthentication.

PasswordAuthentication can't deal with PAM prompts, it is a oneshot only
option (ie fails if PAM asks you to make a pasword change), while
ChallengeResponseAuthentication is the more modern method that properly
deals with PAM prompts.

You should prefer ChallengeResponseAuthentication over
PasswordAuthentication.

HTH,
Simo.


> Terry
> 
> From: freeipa-users-bounces at redhat.com [mailto:freeipa-users-bounces at redhat.com] On Behalf Of Terry John
> Sent: 18 February 2016 11:41
> To: freeipa-users at redhat.com
> Subject: [Freeipa-users] 14: No supported authentication methods available
> 
> I have an AWS instance running Centos 6.7 correctly configured for freeipa but I needed to make a backup machine which would remain live.
> 
> I created a clone of the machine and changed the host name and the settings in /etc/hosts. When I tried to run ipa-client-install it told me to run the uninstall which I did. This had the worrying effect of not being able to log into my original live server but thankfully after a while it came good. I don't know why.
> 
> Back on the new server I ran 'ipa-client-install --enable-dns-updates -mkhomedir' and it seemed to run ok. The host was created on the freeipa GUI and I added it to the same host group as the original server. But when I try to log in via SSH I get the error 'No supported authentication methods available'. I do have root access via the AWS Key file.
> 
> As far as I can tell all the relevant settings seem the same between the two servers but one works and the other doesn't. I can kinit and klist using my freeipa account. 'getent netgroup my-servergroup' works fine.
> 
> I can't seem to find anything relevant in the sssd logs and /var/log/secure just give me the same error of no supported authentication methods available
> 
> I have noticed in /var/log/messages when I restart sssd and error which may be relevant but can't find anything useful so far
> 
> sssd[be[my.domain.net]]: dereference processing failed : Input/output error
> 
> Thanks
> 
> Terry
> 
> 
> 
> The Manheim group of companies within the UK comprises: Manheim Europe Limited (registered number: 03183918), Manheim Auctions Limited (registered number: 00448761), Manheim Retail Services Limited (registered number: 02838588), Motors.co.uk Limited (registered number: 05975777), Real Time Communications Limited (registered number: 04277845) and Complete Automotive Solutions Limited (registered number: 05302535). Each of these companies is registered in England and Wales with the registered office address of Central House, Leeds Road, Rothwell, Leeds LS26 0JE. The Manheim group of companies operates under various brand/trading names including Manheim Inspection Services, Manheim Auctions, Manheim Direct, Manheim De-fleet and Manheim Aftersales Solutions.
> 
> V:0CF72C13B2AC
> 
> 
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-- 
Simo Sorce * Red Hat, Inc * New York