rsync - Apr 2005 - [Bug 2583] New: rsync fails with "authentication failure"

https://bugzilla.samba.org/show_bug.cgi?id=2583

           Summary: rsync fails with "authentication failure"
           Product: rsync
           Version: 2.6.4
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P3
         Component: core
        AssignedTo: wayned@samba.org
        ReportedBy: hpa@zytor.com
         QAContact: rsync-qa@samba.org


On kernel.org, we have a upload system which consists of one server rsyncing to
another, using an rsync daemon with a very long, random password.

Since upgrading the server to an x86-64 machine running Fedora Core 3 and rsync
2.6.3 (also tried rsync 2.6.4) we have been getting the following errors.  The
client machine is a i386 tested with rsync 2.5.8 from RHEL3 as well as rsync
2.6.3 and 2.6.4:

[Note: this message is from rsync-2.6.4-2 from Fedora Development.]
@ERROR: auth failed on module pubupload
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(420)

There are a total of four upload modules, of which "pubupload" is the
largest
one by several orders of magnitude.  These errors *only* happen on the
"pubupload" module, and even then not consistently (fortunately.)

The command used on the client host is:

rsync -rlHtSpq --delete --timeout=3600 --exclude /mirrors/ --exclude lost+found/
--exclude '.#*' /pub/ korg@zeus2.kernel.org::pubupload/

Please contact me directly for a copy of the rsyncd.conf file, since I do not
want to post it publically.

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On Thu, 7 Apr 2005, <samba-bugs@samba.org> wrote:
>
> https://bugzilla.samba.org/show_bug.cgi?id=2583
(replying to the list for now...)

....
> Since upgrading the server to an x86-64 machine running Fedora Core 3 and
rsync
> 2.6.3 (also tried rsync 2.6.4) we have been getting the following errors. 
The
> client machine is a i386 tested with rsync 2.5.8 from RHEL3 as well as
rsync
> 2.6.3 and 2.6.4:
> 
> [Note: this message is from rsync-2.6.4-2 from Fedora Development.]
> @ERROR: auth failed on module pubupload
> rsync: connection unexpectedly closed (0 bytes received so far) [sender]
> rsync error: error in rsync protocol data stream (code 12) at io.c(420)
....
> The command used on the client host is:
> 
> rsync -rlHtSpq --delete --timeout=3600 --exclude /mirrors/ --exclude
lost+found/
> --exclude '.#*' /pub/ korg@zeus2.kernel.org::pubupload/
So there's yet another case of an upgrade to FC 3 causing an auth problem.

It looks like the client tries to contact the daemon to do the auth by
calling auth_server().  It fails, so the client prints the @ERROR message.

Wayne - is the 'connection unexpectedly closed' normal?  Or does that
indicate that the daemon child probably crashed like it's been doing
in other cases?

Here are some links to related issues that I've compiled:

  "connection unexpectedly closed error"
  http://www.mail-archive.com/rsync@lists.samba.org/msg12745.html

  "Re: rsync crashing under centos 4"
  http://www.mail-archive.com/rsync@lists.samba.org/msg12815.html

  "Re: Anonymous rsync + chroot + LDAP"
  http://www.mail-archive.com/rsync@lists.samba.org/msg12709.html

Hope that helps.

Maybe this issue needs to be added to the Current Issues page?
-- 
        John Van Essen  Univ of Minn. Alumnus  <vanes002@umn.edu>