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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Strange. It seems like it is not using the /etc/pam.d/vsftpd file. Or it is exiting early due to the current stack; i.e. required, sufficient directives that may exist in the /etc/pam.d/common-session
file.<br>
<br>
That is why I suggested to place it in the common-session to trigger the pam_exec.so for all services. Perhaps place it higher in the stack vs. the end.<br>
<br>
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<div style="direction: ltr;" id="divRpF316997"><font face="Tahoma" size="2" color="#000000"><b>From:</b> pam-list-bounces@redhat.com [pam-list-bounces@redhat.com] on behalf of Chip [jeffschips@gmail.com]<br>
<b>Sent:</b> Thursday, December 25, 2014 9:27 AM<br>
<b>To:</b> Pluggable Authentication Modules<br>
<b>Subject:</b> Re: PAM not playing nicely with vsftpd and pam_exec.so<br>
</font><br>
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<div class="moz-cite-prefix">On 12/25/2014 10:02 AM, Jason Gerfen wrote:<br>
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<blockquote type="cite">
<div>Correct. I have to apologize for my short and totally incoherent response. I received the question at near midnight and know better than to respond to a fairly technical question right before retiring for the evening.<br>
<br>
My assumption is that your /etc/pam.d/vsftpd matches /etc/pam.d/sshd line for line except the line for session triggering the pam_exec.so module.<br>
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</blockquote>
<br>
I originally thought of that idea but didn't invoke it out of fear that it could cause security issues since sshd is built for sshd and vsftpd is built for vsftpd -- and not being very well versed in pam didn't want to take any risks. Are you sure it's a good
idea to copy over the sshd to vsftpd?<br>
<blockquote type="cite">
<div><br>
Does the user you are testing with have a valid shell directive within the /etc/passwd file? I.E. /bin/bash, /bin/sh etc?<br>
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</blockquote>
etc/passwd for the specified user contains: <br>
specifieduser:x:1000:1000:specifieduser,,,:/home/specifieduser:/bin/bash<br>
<br>
<blockquote type="cite">
<div><br>
And if so, does pam_shells.so exist anywhere within the common includes for the /etc/pam.d/vsftpd file? I ask these questions due to this particular configuration
<a class="moz-txt-link-freetext" href="http://unix.stackexchange.com/questions/37539/vsftpd-fails-pam-authentication" target="_blank">
http://unix.stackexchange.com/questions/37539/vsftpd-fails-pam-authentication</a>.<br>
<br>
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</blockquote>
only exists in chsh which I believe is not referenced in any of this work<br>
<br>
<blockquote type="cite">
<div>Can you add a debug directive to the line; i.e. 'session optional pam_exec.so debug'? According to the documentation for pam_exec.so at
<a href="http://linux.die.net/man/8/pam_exec" target="_blank">http://linux.die.net/man/8/pam_exec</a> you can also add a log directive and monitor that during your tests.<br>
</div>
</blockquote>
<br>
When I tail auth.log after inserting "session optional pam_exec.so" at the end of the sshd file (which properly triggers the executable) I see this:<br>
<br>
Dec 25 11:16:06 specifieduser sshd[6699]: Accepted password for specifieduser from xx.xx.xx.xx port 50393 ssh2<br>
Dec 25 11:16:06 specifieduser sshd[6699]: pam_unix(sshd:session): session opened for user specifieduser by (uid=0)<br>
Dec 25 11:16:09 specifieduser sshd[6699]: pam_exec(sshd:session): No path given as argument<br>
Dec 25 11:16:09 specifieduser sshd[6699]: lastlog_openseek: Couldn't stat /var/log/lastlog: No such file or directory<br>
Dec 25 11:16:09 specifieduser sshd[6699]: lastlog_openseek: Couldn't stat /var/log/lastlog: No such file or directory<br>
<br>
However, inserting "session optional pam_exec.so" into the vsftpd file at the end, produces no output. . . is pam not seeing vsftpd or vica versa?<br>
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<blockquote type="cite">
<div><br>
Those should help you further diagnose the actual problem when it works for the sshd service.<br>
<div>
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<div id="divRpF711942"><b>From:</b> <a class="moz-txt-link-abbreviated" href="mailto:pam-list-bounces@redhat.com" target="_blank">
pam-list-bounces@redhat.com</a> [<a class="moz-txt-link-abbreviated" href="mailto:pam-list-bounces@redhat.com" target="_blank">pam-list-bounces@redhat.com</a>] on behalf of Jeffrey Starin [<a class="moz-txt-link-abbreviated" href="mailto:jeffschips@gmail.com" target="_blank">jeffschips@gmail.com</a>]<br>
<b>Sent:</b> Thursday, December 25, 2014 12:48 AM<br>
<b>To:</b> Pluggable Authentication Modules<br>
<b>Subject:</b> Re: PAM not playing nicely with vsftpd and pam_exec.so<br>
<br>
</div>
<div>
<p dir="ltr">Okay. I need a bit more explanation. Glad to hear there might be hope but don't completely understand "always that directive to common session" . I think you mean place the statement:</p>
<blockquote>
<p dir="ltr">session optional pam_exec.so </p>
<p dir="ltr">Inside the common session file?</p>
<p dir="ltr">If so what is the theory behind why that could work -- trying to teach myself the reasons why that could be a solution.
</p>
<p dir="ltr">Thank you. <br>
</p>
</blockquote>
<div class="gmail_quote">On Dec 25, 2014 2:24 AM, "Jason Gerfen" <<a href="mailto:jason.gerfen@utah.edu" target="_blank">jason.gerfen@utah.edu</a>> wrote:<br type="attribution">
<blockquote class="gmail_quote">
<div dir="auto">
<div>You could always that directive to common-session and try. <br>
<br>
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<div><br>
On Dec 24, 2014, at 11:01 PM, "Chip" <<a href="mailto:jeffschips@gmail.com" target="_blank">jeffschips@gmail.com</a>> wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<p>I've researched this feature extensively and need help. PAM is a difficult authentication program for me to thoroughly understand although I'm learning.</p>
<p>Running Debian Wheezy.<br>
</p>
<p>Have pam setup to trigger off an email when users login using sshd -- that works fine. No problem using this command in the /etc/pam.d/sshd file:<br>
</p>
<p>session optional pam_exec.so /usr/local/bin/notify.sh<br>
</p>
<p>However, I need it to work with vsftpd and getting it to work with sshd was just a test. However, I can't get it to work with vsftpd, the contents of /etc/pam.d/vsftpd are:<br>
</p>
<p><br>
auth required pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed<br>
@include common-account<br>
@include common-session<br>
@include common-auth<br>
session optional pam_exec.so /usr/local/bin/notify-login.sh</p>
<p>What am I missing here? Is pam even designed to work with vsftpd? Running the following command indicates it's hooked into vsftpd, but pam_exec.so doesn't seem to want to play nicely with vsftpd.<br>
</p>
<p>$ ldd /{,usr/}{bin,sbin}/* | grep -B 5 libpam | grep '^/'<br>
/bin/login:<br>
/bin/su:<br>
/sbin/mkhomedir_helper:<br>
/sbin/pam_tally2:<br>
/usr/bin/chfn:<br>
/usr/bin/chsh:<br>
/usr/bin/c_rehash:<br>
/usr/bin/crontab:<br>
/usr/bin/passwd:<br>
/usr/sbin/aspell-autobuildhash:<br>
/usr/sbin/atd:<br>
/usr/sbin/chpasswd:<br>
/usr/sbin/cron:<br>
/usr/sbin/newusers:<br>
/usr/sbin/sshd:<br>
/usr/sbin/vsftpd:<br>
<br>
</p>
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<pre>_______________________________________________
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