[Samba] Windows 7 attempting to access Samba over port 80

simo idra at samba.org
Tue May 29 12:12:07 MDT 2012

IIRc I have seen Windows trying to use port 80 and webdav when no port
139/445 was available.
Only from the graphical shell though. This is not done at the redirector
level, but up the stack when the machine can't be found using SMB.


On Tue, 2012-05-29 at 14:02 -0400, Gaiseric Vandal wrote: 
> Since it is port 80, can you capture the contents of the packets? 
> It might be Outlook trying to autoconfigure a mail account?  Outlook
> will poke around on several ports trying to locate a mail server. 
> I believe Windows clients should try to connect on port 445 then fall
> back to 137-139.    The only way samba would use port 80 is if you were
> using an SSL tunnel BUT I don't think Windows client natively supports
> that. 
> On 05/29/12 11:15, Tom Noonan II wrote:
> > Good Morning:
> > 	I'm running a domain-joined Samba 3.6 server.  For the majority of
> > users it is working as expected; they can log in without issue using their
> > domain credentials and AD group ACLs are working.  However, I have one
> > Windows 7 user who is complaining he can't log in.  When I looked on the server
> > I see no logs for his machine.  I did a initial traffic sniff and I see his
> > machine is pinging the Samba server on port 80.
> > 	I want to clearly state I don't think this is a samba problem.  The
> > overall majority of users are not complaining about this server.  Based on the
> > information I have today, Samba doesn't even come into play as the Win7 box
> > pings the wrong port.  I do still need to verify that the client is starting
> > initially on port 80, and not trying 445, failing, caching the failure, and
> > then falling back to 80 on subsequent attempts.
> > 	So, I want to pose the following question to the list: has anyone seen
> > this?  I shoulder surfed and I don't believe it to be user error at this time.
> > I have a sit-down with the user tomorrow to try and resolve this.  However, I
> > currently believe this is a client side issue and I don't know what to check
> > client side.  (I'm a Linux admin, not Windows)  Can any of the Windows guys on
> > this list advise?
> > 	Thanks!
> >

Simo Sorce
Samba Team GPL Compliance Officer <simo at samba.org>
Principal Software Engineer at Red Hat, Inc. <simo at redhat.com>

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