RHEL6 pam_tally2 lockouts
Johan Booysen
johan at matrixsolutions.co.uk
Tue Jan 11 13:11:44 UTC 2011
Paul - thanks very much for your reply.
My understanding was that it should go into the /etc/pam.d/system-auth
file, but I've tried it in the /etc/pam.d/sshd file and it seems to work
in terms of logging failed logon attempts in /var/log/tallylog, e.g.
Login Failures Latest failure
test 6 01/11/11 12:04:23
However, the account does not get locked out after the specified 3
number of logon attempts mentioned on the following line:
auth required pam_tally2.so deny=3 onerr=fail
The pam_tally2 man page mentions:
deny=n Deny access if tally for this user exceeds n.
Anyone have any idea why the account doesn't get locked?
Regards,
Johan
-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of Mr. Paul M. Whitney
Sent: 10 January 2011 17:50
To: General Red Hat Linux discussion list
Subject: Re: RHEL6 pam_tally2 lockouts
Have you tried putting the entries in /etc/pam.d/ssh instead of
system-auth?
Paul W.
On Jan 10, 2011, at 10:40, Johan Booysen <johan at matrixsolutions.co.uk>
wrote:
> I'm trying to set up a RHEL6 server for sftp access only. So far it
> works very well, but I can't seem to get pam_tally2 set up to lock
user
> accounts after so many unsuccessful login attempts.
>
>
>
> As far as I could find out, it should work if I add the following
lines
> to /etc/pam.d/system-auth:
>
>
>
> Last line in the auth section:
>
> auth required pam_tally2.so deny=3 onerr=fail
>
>
>
> Last line in the account section:
>
> account required pam_tally2.so
>
>
>
> According to the pam_tally2 man page this should log failed attempts
in
> /var/log/tallylog, but when I deliberately log in with nonsense
> usernames/password, I get absolutely nothing in the tallylog file.
> Hence running the pam_tally2 command with no options produces no
> results.
>
>
>
> /var/log/secure shows me entries such as:
>
>
>
> Jan 10 15:16:26 rhel6 sshd[1918]: Failed password for test from
> 192.x.x.x port 4467 ssh2
>
> Jan 10 15:16:29 rhel6 sshd[1918]: Failed password for test from
192.x.x.
> port 4467 ssh2
>
> Jan 10 15:16:29 rhel6 sshd[1919]: Disconnecting: Too many
authentication
> failures for test
>
> Jan 10 15:16:29 rhel6 sshd[1918]: PAM 1 more authentication failure;
> logname= uid=0 euid=0 tty=ssh ruser= rhost=mc23.xxxxx.int user=test
>
>
>
> In /etc/ssh/sshd_config I've got
>
>
>
> UsePAM yes
>
> PasswordAuthentication yes
>
> ChallengeResponseAuthentication no
>
>
>
> I might be missing something silly here, so I'd really appreciate any
> advice on getting this to work on Red Hat Enterprise Linux 6.
>
>
>
> Thanks.
>
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