Network slow in one direction

[Ken & Joy Carr]

Rick Stevens wrote:
> Ken & Joy Carr wrote:
>> Rick Stevens wrote:
>> 
>>> Ken & Joy Carr wrote:
>>> 
>>>> We have a network with a Linux (FC2) server and several Windows
>>>> (XP and Win2K) workstations. Samba on the server provides shared
>>>> folders for the windows machines. 
>>>> 
>>>> Opening files that are in a Linux-shared folder from a windows
>>>> machine happens very quickly. However, saving files from the
>>>> windows machines to a shared folder takes an excessively long
>>>> time. For example, opening an 8 MB file (in a server shared
>>>> folder) using Power Point takes 1-2 seconds while saving the same
>>>> file takes over 5 minutes. 
>>>> 
>>>> The problem is present from any of the windows machines and happens
>>>> with any of the shared folders. Different applications, and copying
>>>> files using windows explorer exhibit the same problem.
>>> 
>>> Have you checked the Samba logs in /var/log/samba/hostname.log to
>>> see if that offers a clue? 
>>> 
>> 
>> There is no 'hostname.log' - here is a portion of smbd.log --
>> -- it begins with a reboot of the Linux server --
>> ***begin smbd.log fragment***
    < snip log fragment >
>> ***end smbd.log fragment***    
> 
> You have some serious DNS issues.  Those "getpeername" failures are
> not good.  Someone, somewhere is using bogus IPs (0.0.0.0).  Check
> your DNS configuration.  If you're not using DNS, then check the
> /etc/hosts file on your Linux machines and your
> c:\win32\system\lmhosts file on the Windows boxes.  Make sure all
> machines know the IPs of all the others.    
> 
>>> I suspect you either have an authentication problem or there's an
>>> issue with converting Windows-style permissions to Linux-style. 
>>> We'd need to see the share definition in your /etc/samba/smb.conf
>>> file as well as the authentication bits from the [global] section.
>> 
>> Here is smb.conf --
>> ***begin smb.conf***
   < snip smb.conf >
>> ***end smb.conf***> 

> It's not a good idea to have a "valid users =" line in a [homes]
> section, and it certainly should NOT have an "%S" in it (I'd even be
> suspicious of "%u" or "%U").  It'd be better to set up a global
> "invalid users =" list and remove this line entirely.   
> 
> 
> I think a large part of the problem here is DNS or the lack thereof.

You've given us a lot to think about - thanks. 
Vacation starts tomorrow so I'll get back to this when I return.

> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -        "More hay, Trigger?" "No thanks, Roy, I'm stuffed!"         -
> ----------------------------------------------------------------------
> 
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