[PLUG] ProFTPd error.

[Steve Bonds]

Shannon has the problem nailed dead-on.

They are using a braindead FTP client that does not allow passive FTP. (NT
default)

... and ...

They are behind a firewall which does not allow *incoming* (to
them) connections on port 20.

Solution:

Ask them to use an FTP client that supports passive FTP.

  -- Steve

On Fri, 28 Jun 2002, Shannon C. Dealy dealy at deatech.com XXXXXXXXXXXXXXXXXXX wrote:

> On 28 Jun 2002, Timothy Grant wrote:
> 
> [snip]
> > We're not seeing any indications of failure on our end but they get the
> > following...
> >
> >
> > ======================================
> > Connected to . 220 ProFTPD 1.2.4 Server (ftp.2rentrak.com)
> > [208.26.192.25]
> > User (:(none)):
> > 331 Password required for xxxx.
> >
> > 230 User xxxx logged in.
> > ftp> ftp>
> > bin
> > 200 Type set to I.
> > ftp> ftp> get /OUT/internal_xref_20020618.xml.gz
> > Not connected. ftp> get /OUT/internal_20020618.xml.gz
> > quit
> [snip]
> 
> This is fairly typical of a firewall that is not properly configured to
> allow the type of ftp connection being used.  The problem can be with the
> configuration of a firewall at either end of the link (or both ends).  I
> don't see anything here indicating if you are using passive or active ftp
> for the link, but you could try setting it both ways to see if either one
> works, though of course for either to work, the firewalls at both ends
> must be configured to specifically allow that mode of ftp to operate.
> Passive and active ftp independently require special rules in the
> firewall to allow them to work, so the firewalls must be configured
> specifically for each protocol used.
> 
> Shannon C. Dealy      |               DeaTech Research Inc.
> dealy at deatech.com     |          - Custom Software Development -
>                       |    Embedded Systems, Real-time, Device Drivers
> Phone: (800) 467-5820 | Networking, Scientific & Engineering Applications
>    or: (541) 451-5177 |                  www.deatech.com
> 
> 
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