If you just want to run a few SFTP transfers from Windows, the easiest way is to use Net::SFTP::Foreign with plink (from the PuTTY project), though plink is not very fast. Using the Net::SSH2 backend is usually faster, but that package requires a compiler to be installed or a precompiled package. Alternatively, if you are allowed to switch your perl, Strawberry Perl has it by default.

Finally, if your scripts are already written around Net::SFTP, you can switch them to use Net::SFTP::Foreign::Compat which provides a (mostly) compatible API on top of Net::SFTP::Foreign.

If you decide to stick to Net::SFTP, then you will have to install Net::SSH::Perl and all of its dependencies, including the daunting Math::PARI!

I don't see Net::SFTP listed in the ppm index for that repo, it does have Net-SFTP-Foreign and Net-SFTP-Foreign-Backend-Net_SSH2.

"Reading the doc, I found I should use ppm"

I don't see any mention of this in Net::SFTP, can you tell me where you see this? You may also want to look at the reviews/bugs for this module. Consider Net::SFTP::Foreign

OK, I might have not been very precise :
My goal is to be able to do SFTP from the Windows server, whatever module I use, I don't really mind (for now...).

Following your advice, I tried to install Net::SFTP::Foreign :

ppm> install Net::SFTP::Foreign
Downloading www.sisyphusion.tk packlist...redirect
Downloading Net-SFTP-Foreign-1.53...redirect
Downloading Net-SFTP-Foreign-1.53...redirect
Downloading Net-SFTP-Foreign-1.53...failed 500 Can't locate object met
+hod "new" via package "LWP::Protocol::https::Socket"
ppm install failed: 500 Can't locate object method "new" via package "
+LWP::Protocol::https::Socket"
ppm> install LWP::Protocol::https::Socket
ppm install failed: Can't find any package that provide LWP::Protocol:
+:https::Socket
[download]

I thought maybe the 2nd repo was a problem, so deleted it, and retried :

ppm> repo delete 2
Repo 2 deleted.
ppm> install Net::SFTP::Foreign
Downloading Net-SFTP-Foreign-1.53...redirect
Downloading Net-SFTP-Foreign-1.53...redirect
ppm install failed: 501 Protocol scheme 'https' is not supported (Cryp
+t::SSLeay not installed)
[download]

Same error, again
Any recommendation ?

ppm install failed: 501 Protocol scheme 'https' is not supported ...

Seems odd to me that https is being called on to download from a http site.
I've not seen this sort of error before with PPM.

UPDATE: Try running 'ppm log' (or just 'log' if you're in the ppm shell) immediately after the error has happened. That will hopefully give a better idea of what's going wrong.

There are, however, other problems with the sisyphusion repo at the moment. The hosts have messed with its accessibility again, so it looks like I'll have to contact them .... again.
I keep getting "403 forbidden" errors - even though all files are readily available via the browser.
Last time this happened they had to "whitelist one of ModSecurity rules", so I guess some dickhead has messed with those rules again.

You can still install Net-SSH2 on your perl-5.8.8 by grabbing http://www.sisyphusion.tk/ppm/x86/Net-SSH2-58.tar.gz.
Place that file in some directory along with the following file named Net-SSH2.ppd:

<?xml version="1.0" encoding="UTF-8" ?>
<SOFTPKG NAME="Net-SSH2" VERSION="0,56,0,0">
    <TITLE>Net-SSH2</TITLE>
    <ABSTRACT>Support for the SSH 2 protocol via libssh2</ABSTRACT>
    <AUTHOR>Rafael Kitover</AUTHOR>
    <PROVIDE NAME="Net::SSH2" VERSION="0.56" /> 
    <IMPLEMENTATION>
        <OS NAME="MSWin32" />
        <ARCHITECTURE NAME="MSWin32-x86-multi-thread-5.8" />
        <CODEBASE HREF="Net-SSH2-58.tar.gz" /> 
    </IMPLEMENTATION>
</SOFTPKG>
[download]

(Beware of line wrapping if you copy'n'paste that code.)

Then 'cd' to that directory and run:

ppm install Net-SSH2.ppd --force
[download]

Then go through the same rigmarole for Net-SFTP-Foreign and Net-SFTP-Foreign-Backend-Net_SSH2 .... yuk !!

Grab http://www.sisyphusion.tk/ppm/x86/Net-SFTP-Foreign-58.tar.gz and http://www.sisyphusion.tk/ppm/x86/Net-SFTP-Foreign-Backend-Net_SSH2-58.tar.gz.

Net-SFTP-Foreign.ppd needs to be:

<?xml version="1.0" encoding="UTF-8" ?>
<SOFTPKG NAME="Net-SFTP-Foreign" VERSION="1,77,0,0">
    <TITLE>Net-SFTP-Foreign</TITLE>
    <ABSTRACT>Secure File Transfer Protocol client</ABSTRACT>
    <AUTHOR>Salvador Fandino Garcia</AUTHOR>
    <PROVIDE NAME="Net::SFTP::Foreign" VERSION="1.77" /> 
    <IMPLEMENTATION>
        <OS NAME="MSWin32" />
        <ARCHITECTURE NAME="MSWin32-x86-multi-thread-5.8" />
        <CODEBASE HREF="Net-SFTP-Foreign-58.tar.gz" /> 
    </IMPLEMENTATION>
</SOFTPKG>
[download]

Net-SFTP-Foreign-Backend-Net_SSH2.ppd needs to be:

<?xml version="1.0" encoding="UTF-8" ?>
<SOFTPKG NAME="Net-SFTP-Foreign-Backend-Net_SSH2" VERSION="0,09,0,0">
    <TITLE>Net-SFTP-Foreign-Backend-Net_SSH2</TITLE>
    <ABSTRACT>Run Net::SFTP::Foreign on top of Net::SSH2</ABSTRACT>
    <AUTHOR>Salvador Fandino Garcia</AUTHOR>
    <PROVIDE NAME="Net::SFTP::Foreign::Backend::Net_SSH2" VERSION="0.0
+9" /> 
    <IMPLEMENTATION>
        <OS NAME="MSWin32" />
        <ARCHITECTURE NAME="MSWin32-x86-multi-thread-5.8" />
        <CODEBASE HREF="Net-SFTP-Foreign-Backend-Net_SSH2-58.tar.gz" /
+> 
    </IMPLEMENTATION>
</SOFTPKG>
[download]

(Again - beware of line wrapping if you copy'n'paste that code.)

I'll report back here once I've verified that accessibility to the sisyphusion repo has been restored. (I'm actually currently able to access it with the PPM that ships with StrawberryPerl, but not the one that ships with ActivePerl-5.8.9 .... strange.)

Cheers,
Rob

As side note, maybe you are happy to know that is possible and frequent to have such tools at disposal and, most important, working. strawberryperl release notes contains 34 external tools and among them binutils and make and dmake and gcc so that you can feel more comfortable while in shaggy environments.

During lasts yaers i had no problems with cpan or cpanp clients that sheep with StrawberryPerl.

Just for your info.

L*