FTP site

  • Thread starter Thread starter Faram
  • Start date Start date
F

Faram

Hi,

when I use IP address I can save file in FTP site, but in command line when
I use the name and path to the FTP site after a while give me this message:
can't build data connection: connection timed out. any ideas?

Thanks in advance
Faram
 
Hi
You have to give more info about the location and method of the ftp
connection and what applications you are using.
Jack (MVP-Networking).
 
Faram said:
Hi,

when I use IP address I can save file in FTP site, but in command line
when
I use the name and path to the FTP site after a while give me this
message:
can't build data connection: connection timed out. any ideas?

Thanks in advance
Faram
Click to expand...


I doubt it's to do with using IP address versus name.

I think it's to do with the FTP mode ( active/PORT or PASV ) which your FTP
client is using.

FTP can operate in one of 2 fundamentally different ways: Active ( PORT )
mode, or PASV mode. This determines how the data connection is built. (
either from the outside in ( PORT ), or from the inside out (PASV) ) Active
mode can cause problems if you ( the FTP client ) are behind a NAT router or
firewall, because the inbound data connection may be bolcked as
un-solicited. PASV mode is designed for clients behind a NAT / firewall.

I suspect the method you are using with IP address is connecting using PASV
mode. The supplied command-line FTP client is poor, and does not support
PASV mode. It always uses PORT mode.

All 3-rd party FTP programs will support PASV mode.
Get a better one here:

ftp://ftp.gnu.org/old-gnu/emacs/windows/contrib/ftp-for-win32.zip


Do a ? at ths one, and see there are many more commands.
PASV is the one you need.
 
Back
Top