File access slow with using key authentication.

File access slow with using key authentication.

[Maglinger, Paul]

Running CYGWIN_NT-6.1-WOW64 1.7.16(0.262/5/3) on Windows 2008R2 box.

When using SSH to come in through UNIX, we'd like to use public key authentication.  The problem is that when we do it can take up to 5 minutes to even pull down a directory listing on a Windows share using ls -l from the Cygwin terminal.  If we do without the key and enter the password manually, things speed up vastly, but we want to authenticate automatically and would prefer to use a key.   I believe I understand why it's happening, but I'm having trouble figuring how to work around this.  The goal is to have Unix kick off a Perl script residing on the Windows server, which will process files located on a CIFS share on a storage appliance.  The Perl script is using UNC to access the shared directories.  I've even tried various ways to mount the directories using fstab and that's not helping either.  I've only been working with Cygwin for less than a month and would appreciate some insight.

-Paul

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FW: File access slow with using key authentication.

[Maglinger, Paul]

Anyone?


Running CYGWIN_NT-6.1-WOW64 1.7.16(0.262/5/3) on Windows 2008R2 box.

When using SSH to come in through UNIX, we'd like to use public key authentication.  The problem is that when we do it can take up to 5 minutes to even pull down a directory listing on a Windows share using ls -l from the Cygwin terminal.  If we do without the key and enter the password manually, things speed up vastly, but we want to authenticate automatically and would prefer to use a key.   I believe I understand why it's happening, but I'm having trouble figuring how to work around this.  The goal is to have Unix kick off a Perl script residing on the Windows server, which will process files located on a CIFS share on a storage appliance.  The Perl script is using UNC to access the shared directories.  I've even tried various ways to mount the directories using fstab and that's not helping either.  I've only been working with Cygwin for less than a month and would appreciate some insight.

-Paul

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Re: FW: File access slow with using key authentication.

[Larry Hall (Cygwin)]

On 9/5/2012 4:47 PM, Maglinger, Paul wrote:
> Anyone?
>
>
> Running CYGWIN_NT-6.1-WOW64 1.7.16(0.262/5/3) on Windows 2008R2 box.
>
> When using SSH to come in through UNIX, we'd like to use public key
> authentication. The problem is that when we do it can take up to 5 minutes
> to even pull down a directory listing on a Windows share using ls -l from
> the Cygwin terminal. If we do without the key and enter the password
> manually, things speed up vastly, but we want to authenticate automatically
> and would prefer to use a key. I believe I understand why it's happening,
> but I'm having trouble figuring how to work around this. The goal is to have
> Unix kick off a Perl script residing on the Windows server, which will
> process files located on a CIFS share on a storage appliance. The Perl
> script is using UNC to access the shared directories. I've even tried
> various ways to mount the directories using fstab and that's not helping
> either. I've only been working with Cygwin for less than a month and would
> appreciate some insight.

I've read through your summary above at least twice now but I'm still
having trouble grokking the details of what you're doing.  Judging by the
lack of other responses, I'm guessing others are similarly stymied.
Perhaps you should back up and read the problem reporting guidelines
found at the link below:

> Problem reports:       http://cygwin.com/problems.html

Details are important.  Some pieces of information that may prove useful
include:

   1. Does sshing to the same server (presumably running Cygwin's sshd)
      from that or other Cygwin machine exhibit the same problem?

   2. How big is the directory you're running 'ls -l' on?  Do the results
      change if you instead use just '"ls"'?

   3. Who's the storage appliance's vendor?  Who has permissions to access
      it?  Keep in mind that public key authentication that's configured
      for you by default doesn't allow unfettered access to network shares.
      See <http://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-setuid-overview>
      for a detailed description of the authentication options and
      restrictions.


-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
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RE: FW: File access slow with using key authentication.

[Maglinger, Paul]

> 
> On 9/5/2012 4:47 PM, Maglinger, Paul wrote:
> > Anyone?
> >
> >
> > Running CYGWIN_NT-6.1-WOW64 1.7.16(0.262/5/3) on Windows 2008R2 box.
> >
> > When using SSH to come in through UNIX, we'd like to use public key
> > authentication. The problem is that when we do it can take up to 5 minutes
> > to even pull down a directory listing on a Windows share using ls -l from
> > the Cygwin terminal. If we do without the key and enter the password
> > manually, things speed up vastly, but we want to authenticate automatically
> > and would prefer to use a key. I believe I understand why it's happening,
> > but I'm having trouble figuring how to work around this. The goal is to have
> > Unix kick off a Perl script residing on the Windows server, which will
> > process files located on a CIFS share on a storage appliance. The Perl
> > script is using UNC to access the shared directories. I've even tried
> > various ways to mount the directories using fstab and that's not helping
> > either. I've only been working with Cygwin for less than a month and would
> > appreciate some insight.
> 
> I've read through your summary above at least twice now but I'm still
> having trouble grokking the details of what you're doing.  Judging by the
> lack of other responses, I'm guessing others are similarly stymied.
> Perhaps you should back up and read the problem reporting guidelines
> found at the link below:
> 
> > Problem reports:       http://cygwin.com/problems.html
> 
> Details are important.  Some pieces of information that may prove useful
> include:
> 
>    1. Does sshing to the same server (presumably running Cygwin's sshd)
>       from that or other Cygwin machine exhibit the same problem?
> 
>    2. How big is the directory you're running 'ls -l' on?  Do the results
>       change if you instead use just '"ls"'?
> 
>    3. Who's the storage appliance's vendor?  Who has permissions to access
>       it?  Keep in mind that public key authentication that's configured
>       for you by default doesn't allow unfettered access to network shares.
>       See <http://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-setuid-overview>
>       for a detailed description of the authentication options and
>       restrictions.
> 
> 
> --
> Larry
> 

Thanks for the reply.  I'm new to Cygwin and this list and wasn't sure what details I needed to include.  Let me gather some information and I'll get back with you.

-Paul

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