Re: NFS share - NtOpenFile() failed, c00000be

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

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Hi Andy,

in theory this is the wrong mailing list.  The right one for this type
of question is cygwin AT cygwin DOT com.  But see below.

On Oct 29 11:47, Andy O'Shaughnessy wrote:
> I am able to mount an NFS share from Linux but when I use Cygwin I get
> a stranger error:
> 
> $ mount //<server>/<share> /tmp/test1
> 
> $ ls -lrt /tmp
> ls: cannot access /tmp/test1: No such file or directory
> total 0
> d????????? ? ? ? ?            ? test1
> 
> But when I run the following I get :
> 
> $ /usr/lib/csih/getVolInfo /tmp/test1
> NtOpenFile(\??\UNC\<server>\<share>) failed, c00000be
> 
> Note : 0xC00000BE = STATUS_BAD_NETWORK_PATH
> 
> The mount happened but not properly.
> It might be linked to Windows McAfee Firewalls.
> I would guess this mailing list will readily know what is wrong

As Ryan indicated it may be related to firewall settings, but let's take
a step back first.

- Accessing NFS shares does not work out of the box on Windows.  You
  have to install the NFS feature in Windows first:

  Control Panel -> Programs and Features -> Turn Windows features on or off
  -> Services for NFS

  If the above doesn't exist on your machine, you're out of luck.  Since
  Windows 7 this feature is only available to Enterprise customers :(

- In an AD environment you also should make sure to have the required
  authentication as a UNIX user with the right UID/GID.  I urge you to
  read https://cygwin.com/cygwin-ug-net/ntsec.html, especially
  https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nfs and
  https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nsswitch-posix

- In the administrative "Services for NFS" dialog, make sure to disable
  the krb5 security flavors.  I had a lot of trouble with them, but
  there's a good chance I did something wrong, so take this with a grain
  of salt.

- NFSv4 is not support.  Export the shares with NFSv3.

- If you export a share on Unix/Linux like this (/etc/exports):

    /foo/bar/baz  ...

  there won't be a //server/foo share!  There won't be a //server/baz
  share either.  Rather you have to access the full path as in
  //server/foo/bar/baz.  And that sometimes fails for no good reason.
  Therefore, ideally construct your server paths to be exported with a
  single path component, e.g., symlink or bind mount /foo/bar/baz to
  /baz and then export /baz.
  

HTH,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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