[Zope] FTP access and ssh-Port-Forward

[sean.upton@uniontrib.com]

Most FTP clients (WS_FTP, Fetch, etc), though, support persisting a
user-preference to do passive transfers (single, client-initiated TCP
control socket; there is no data connnection), which is reported to do okay
through SSH TCP socket tunnels, though I have never tested this to Zope...

Sean

> -----Original Message-----
> From: Dieter Maurer [mailto:dieter@handshake.de]
> Sent: Wednesday, June 04, 2003 11:25 AM
> To: Andreas Pakulat
> Cc: zope@zope.org
> Subject: Re: [Zope] FTP access and ssh-Port-Forward
> 
> 
> Andreas Pakulat wrote at 2003-6-4 16:40 +0200:
>  > I've got a problem with zope on Solaris system. I can access the
>  > ftp-Port from within the LAN (being either there or using 
> ssh to connect
>  > to a server in the LAN) but not using a port forward for it. I can
>  > however use http-Portforwarding over ssh, but 
> ftp-Portforwarding only
>  > gives me the possibility to login, the ls command "hangs" 
> at entering
>  > Passive Mode. If I turn off passive mode I get error 425 
> Cant build data
>  > connection.
>  > 
>  > Has somebody a soluting how to get ssh-forwarded ftp 
> Access to Zope?
> 
> FTP is a very difficult protocol with respect to forwarding and
> FireWalls. That's because FTP uses two connections, a command
> connection and a data connection. The latter is created on demand.
> It is very difficult to forward the data connection.
> 
> Workarounds:
> 
>   Transfer your data from outside into your LAN (e.g. via "scp")
>   and then use a LAN FTP connection to Zope.
> 
>   Use WebDAV to directly transfer the content into Zope.
> 
>   Use "load_site.py" to import content (and something symmetrically
>   for the reverse direction).
> 
> 
> Dieter
> 
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