FTP client cannot open data connection



The FTP Client is installed on a brand new Windows 2003 computer hosted by
an ISP.
As you can see from the dialog below it cannot open data connection. This
happens with all FTP sites I tried to contact.
Could you help?
Thanks and Best regards,

! Connecting to ftp.microsoft.com...
< 220 Microsoft FTP Service
USER anonymous
< 331 Anonymous access allowed, send identity (e-mail name) as password.
PASS (hidden)
< 230-This is FTP.Microsoft.Com.
< 230 Anonymous user logged in.
SYST < 215 Windows_NT
< 257 "/" is current directory.
< 227 Entering Passive Mode (207,46,133,140,62,22).
< 425 Can't open data connection.
< 257 "/" is current directory.
< 227 Entering Passive Mode (207,46,133,140,62,26).
< 425 Can't open data connection.
! Unable to connect to ftp.microsoft.com! (425 Can't open data connection.)
< 421 Timeout (30 seconds): closing control connection.
< 421 Terminating connection.

Gerry Voras

I ran into this recently. It turns out that there is one of two solutions:

(1) use a passive FTP client like ws_ftp instead of an active client like
the traditional command line. (BTW, I haven't figured out why this works,
only that it does. And PASV never seemed to work for me either.)

(2) your ISP feed has some sort of FTP proxy installed (usually found if you
have some sort of DSL or cable feed and the ISP provides you with the
router). Find it in the router config and turn it off.


Problem Solved!

In IPSec console | IP Security Policies on local computer | Packet Filter
Properties | Block All was checked.

I unchecked it and... magic!


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